{ "$schema_version": "5.3", "review_mode": "fresh", "claim_restatement": { "index_wording": "Antimicrobial Amyloid Hypothesis", "entry_form": "phenomenon", "gradeable_restatement": "Amyloid-beta is an innate antimicrobial effector, and amyloid plaque deposition in Alzheimer disease is a protective pathogen-entrapment response rather than a primary pathological lesion.", "restatement_required": true, "split_into": [], "parent_claim": null, "scope_qualifiers": [ { "qualifier": "Pathogen strain, route, host age/sex/genotype, peptide species and dose fixed before outcomes; human early-AD trial entry and observation horizon retained", "determinable_before_outcome": true, "determined_from": "Enrollment and experimental design, before results; no responder-defined scope.", "action": "retained" } ] }, "hypothesis": { "name": "Antimicrobial Amyloid Hypothesis", "central_claim": "Amyloid-beta is an innate antimicrobial effector, and amyloid plaque deposition in Alzheimer disease is a protective pathogen-entrapment response rather than a primary pathological lesion.", "proposed_mechanism": "Amyloid-beta is an innate antimicrobial effector, and amyloid plaque deposition in Alzheimer disease is a protective pathogen-entrapment response rather than a primary pathological lesion.", "claimed_scope": "Amyloid-beta is an innate antimicrobial effector, and amyloid plaque deposition in Alzheimer disease is a protective pathogen-entrapment response rather than a primary pathological lesion.", "claimed_level": [ "response", "maintenance", "progression" ], "is_conjunctive": true, "conjunctive_note": "Register all six index subclaims; the full conjunction is gated by its weakest link. Forced infection and APP transgenes are not evidence that endogenous A-beta is necessary for human CNS immunity or that sporadic AD plaques are net protective. This is a fresh rank42 review; earlier antimicrobial-amyloid work is preserved and overlap will be disclosed." }, "rubric_routing": { "primary_rubric": "01-neurodegeneration.md", "secondary_rubrics": [ "05-immunology-inflammation.md" ], "index_notes_applied": [ "Register all six index subclaims; the full conjunction is gated by its weakest link. Forced infection and APP transgenes are not evidence that endogenous A-beta is necessary for human CNS immunity or that sporadic AD plaques are net protective. This is a fresh rank42 review; earlier antimicrobial-amyloid work is preserved and overlap will be disclosed." ], "rubric_fit_note": "Exact archived v5.3 framework. Any stale index empirical framing is rechecked against primary results." }, "subclaim_matrix": { "subclaims": [ { "id": "SC1", "statement": "A-beta binds and agglutinates microbes through a peptide-specific mechanism.", "subclaim_type": "mechanism", "scope": "microbe, peptide preparation, concentration and binding controls", "claimed_scope": "microbe, peptide preparation, concentration and binding controls", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Binding-deficient peptide controls and matched antimicrobial assays", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Sequence controls, immunodepletion, binding and structural assays support a real peptide-associated interaction. These experiments remain concentrated or engineered assays; the native CNS mechanism is not established." }, { "id": "SC2", "statement": "A-beta expression protects infected animals.", "subclaim_type": "sufficiency", "scope": "infection challenge and genotype prospectively defined", "claimed_scope": "infection challenge and genotype prospectively defined", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Controlled survival and pathogen burden after expression perturbation", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Salmonella and one HSV study show survival advantages with 5XFAD expression, whereas two HSV approaches and roseolovirus challenge limit generalization. Constitutive transgenes and APP changes do not isolate native peptide causality." }, { "id": "SC3", "statement": "Wild-type endogenous A-beta has antimicrobial function at physiological concentrations.", "subclaim_type": "mechanism", "scope": "wild-type host, native abundance and infective burden", "claimed_scope": "wild-type host, native abundance and infective burden", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Selective endogenous perturbation and matched native-level rescue", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Transformed-cell media show low-nanomolar or reported CSF-range activity, stronger than synthetic MIC alone. No selective wild-type in vivo loss with native-dose rescue establishes the corresponding physiological CNS function." }, { "id": "SC4", "statement": "Endogenous A-beta is necessary for CNS innate antimicrobial defence.", "subclaim_type": "necessity", "scope": "baseline host genotype and CNS infection context", "claimed_scope": "baseline host genotype and CNS infection context", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "A-beta-specific loss and rescue separating other APP functions", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "APP-null Salmonella mortality is nonsignificant and APP-null Zika mortality reflects a decoy-receptor function. APP-fragment activity and synaptic Aβ rescue cannot be transferred to Aβ-specific infection necessity." }, { "id": "SC5", "statement": "Microbial exposure causes amyloid deposition in relevant models.", "subclaim_type": "sufficiency", "scope": "infection, inoculum and APP status set before outcomes", "claimed_scope": "infection, inoculum and APP status set before outcomes", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Infection/sham and pathogen-clearance contrasts", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Some infection experiments increase amyloid, while HSV, roseolovirus and BALB/c replication studies are null and Toxoplasma promotes clearance. Biomarker deposition alone does not establish disease-relevant protective dependency." }, { "id": "SC6", "statement": "Human Alzheimer plaques form around real pathogens as a net protective response.", "subclaim_type": "primacy", "scope": "biomarker-defined sporadic AD, infection ascertainment and clinical horizon", "claimed_scope": "biomarker-defined sporadic AD, infection ascertainment and clinical horizon", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Contamination-controlled spatial evidence plus infection-specific intervention and functional endpoint", "hsef_level": "Β", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Human pathogen/DNA colocalization and culture observations provide association, with null detections and processing effects. No examined human study establishes that plaque entrapment improves clinical or tissue outcomes; anti-amyloid clinical benefit challenges uniformly net-protective deposition." } ], "aggregation_rule": "weakest-link", "aggregation_preregistered": true, "aggregation_rationale": "Register all six index subclaims; the full conjunction is gated by its weakest link. Forced infection and APP transgenes are not evidence that endogenous A-beta is necessary for human CNS immunity or that sporadic AD plaques are net protective. This is a fresh rank42 review; earlier antimicrobial-amyloid work is preserved and overlap will be disclosed.", "primary_subclaim_id": "SC6", "aggregation_derivation": "The preregistered weakest-link rule yields Β from SC6. Direct human support for net protective pathogen-centered plaques is localization and ex vivo activity, without functional necessity, temporal demonstration or infection-stratified benefit. SC1–5 have mechanistic or simplified-model support (Γ); neither APP receptor immunity nor clinical antibody efficacy proves the nominal protective mechanism. This grade does not deny in vitro activity or refute all pathogen contributions.", "aggregation_alternatives": { "weakest_link_would_return": "Β", "primary_subclaim_would_return": "Β", "scope_matched_would_return": "Β", "note": "Separate narrow successes do not replace the preregistered gate." }, "index_rule_deviation": "" }, "competing_models": { "models_evaluated": [ { "rank_in_tournament": 1, "model_id": "M3", "is_nominal": false, "name": "Sterile innate alarm and injury amplification", "core_claim": "Aβ-associated inflammation and deposition can participate in injury without microbial necessity.", "explains_what_nominal_does_not": "Aβ-associated inflammation and deposition can participate in injury without microbial necessity.", "strongest_supporting_evidence": [ "NLRP3/Casp1 loss protects memory and increases clearance; Dectin1 mediates infused Aβ inflammation (PMID23254930,37416769)." ], "strongest_contradictory_evidence": [ "Engineered disease/infused-peptide contexts do not establish every sporadic case; antimicrobial effects remain real." ], "hsef_level_for_this_model": "Ε", "rationale": "NLRP3/Casp1 loss protects memory and increases clearance; Dectin1 mediates infused Aβ inflammation (PMID23254930,37416769). Engineered disease/infused-peptide contexts do not establish every sporadic case; antimicrobial effects remain real." }, { "rank_in_tournament": 2, "model_id": "M4", "is_nominal": false, "name": "Physiological neuromodulation with aggregation-dependent dysfunction", "core_claim": "Native Aβ can support synapses while aggregate states are injurious.", "explains_what_nominal_does_not": "Native Aβ can support synapses while aggregate states are injurious.", "strongest_supporting_evidence": [ "Picomolar memory effects and Aβ rescue of APP-null synaptic plasticity discriminate physiology from total peptide loss (PMID19318468,33926999); controlled human neurons show aggregate-dependent duality (PMID41026542)." ], "strongest_contradictory_evidence": [ "Most tests are ex vivo or applied peptide; not a complete human AD initiating model." ], "hsef_level_for_this_model": "Δ", "rationale": "Picomolar memory effects and Aβ rescue of APP-null synaptic plasticity discriminate physiology from total peptide loss (PMID19318468,33926999); controlled human neurons show aggregate-dependent duality (PMID41026542). Most tests are ex vivo or applied peptide; not a complete human AD initiating model." }, { "rank_in_tournament": 3, "model_id": "M5", "is_nominal": false, "name": "Pathogen-triggered pathology with harmful amyloid", "core_claim": "Some infections induce Aβ and injury rather than necessarily protective plaques.", "explains_what_nominal_does_not": "Some infections induce Aβ and injury rather than necessarily protective plaques.", "strongest_supporting_evidence": [ "Recurrent HSV, oral P.gingivalis and C.pneumoniae models show pathology after infection (PMID30870531,30746447,15013562)." ], "strongest_contradictory_evidence": [ "Null HSV/MRV and Toxoplasma clearance constrain universal microbial triggering (PMID38143354,35033173,26984535)." ], "hsef_level_for_this_model": "Γ", "rationale": "Recurrent HSV, oral P.gingivalis and C.pneumoniae models show pathology after infection (PMID30870531,30746447,15013562). Null HSV/MRV and Toxoplasma clearance constrain universal microbial triggering (PMID38143354,35033173,26984535)." }, { "rank_in_tournament": 4, "model_id": "M2", "is_nominal": false, "name": "Nonspecific amphipathic aggregation", "core_claim": "Concentrated aggregation can bind complex surfaces without an evolved native defence role.", "explains_what_nominal_does_not": "Concentrated aggregation can bind complex surfaces without an evolved native defence role.", "strongest_supporting_evidence": [ "Concentration/state dependence and engineered assays leave a physical aggregation explanation open (PMID27225182,37594661)." ], "strongest_contradictory_evidence": [ "Scrambled/reverse controls, immunodepletion and curli-null differences constrain a wholly nonspecific account (PMID20209079,38438446)." ], "hsef_level_for_this_model": "Γ", "rationale": "Concentration/state dependence and engineered assays leave a physical aggregation explanation open (PMID27225182,37594661). Scrambled/reverse controls, immunodepletion and curli-null differences constrain a wholly nonspecific account (PMID20209079,38438446)." }, { "rank_in_tournament": 5, "model_id": "M1", "is_nominal": true, "name": "Protective antimicrobial amyloid in human AD", "core_claim": "Aβ is an endogenous CNS antimicrobial effector and plaques are net protective pathogen traps.", "explains_what_nominal_does_not": "Aβ is an endogenous CNS antimicrobial effector and plaques are net protective pathogen traps.", "strongest_supporting_evidence": [ "Specific assays, low-dose medium, engineered survival and human DNA localization form its strongest case (PMID20209079,27225182,18973185)." ], "strongest_contradictory_evidence": [ "Native necessity and human net protection lack matched loss/rescue; conflicting HSV assays and clinical benefit from amyloid removal remain unresolved (PMID34052228,37459141,36449413)." ], "hsef_level_for_this_model": "Β", "rationale": "Specific assays, low-dose medium, engineered survival and human DNA localization form its strongest case (PMID20209079,27225182,18973185). Native necessity and human net protection lack matched loss/rescue; conflicting HSV assays and clinical benefit from amyloid removal remain unresolved (PMID34052228,37459141,36449413)." } ], "tournament_summary": "Descriptive comparison; does not modify the nominal score. Aβ-selective conditional manipulation crossed with live infection versus sterile injury, with native-dose rescue and interaction/aggregation-matched controls, would separate protective immunity from generic aggregation and physiological signalling. No examined study completes that discrimination.", "study_separating_rank1_from_rank2": "Aβ-selective conditional manipulation crossed with live infection versus sterile injury, with native-dose rescue and interaction/aggregation-matched controls, would separate protective immunity from generic aggregation and physiological signalling. No examined study completes that discrimination.", "nominal_wins_only_by_funding_artifact": false, "level_unchanged_by_tournament": true }, "evidence_inventory": [ { "n": 1, "pmid": "20209079", "title": "The Alzheimer's disease-associated amyloid beta-protein is an antimicrobial peptide.", "citation": "Soscia SJ, Kirby JE, Washicosky KJ et al. The Alzheimer's disease-associated amyloid beta-protein is an antimicrobial peptide. PloS one. 2010.", "doi": "10.1371/journal.pone.0009505", "pmcid": "PMC2831066", "url": "https://pubmed.ncbi.nlm.nih.gov/20209079/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/20209079/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID20209079", "access_depth": "full_text_partial", "access_note": "Complete primary abstract and linked-status metadata examined. Selected body sections: 3:Materials and Methods:paragraph5, 3:Materials and Methods:paragraph10, 3:Materials and Methods:paragraph12, 1:Results. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3", "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "in vitro and ex vivo human brain", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Synthetic Aβ inhibits multiple microbes; homogenate activity correlates with Aβ and falls after immunodepletion.", "what_it_does_not_show": "Disrupted postmortem homogenate is not native extracellular concentration, living CNS defence or net protective plaques.", "confounders_present": [ "Disrupted postmortem homogenate is not native extracellular concentration, living CNS defence or net protective plaques." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 2, "pmid": "27225182", "title": "Amyloid-β peptide protects against microbial infection in mouse and worm models of Alzheimer's disease.", "citation": "Kumar DK, Choi SH, Washicosky KJ et al. Amyloid-β peptide protects against microbial infection in mouse and worm models of Alzheimer's disease. Science translational medicine. 2016.", "doi": "10.1126/scitranslmed.aaf1059", "pmcid": "PMC5505565", "url": "https://pubmed.ncbi.nlm.nih.gov/27225182/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/27225182/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID27225182", "access_depth": "full_text_partial", "access_note": "Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph1, 1:Results:paragraph6, 1:Results:paragraph7, 1:Results:paragraph9, 1:Results:paragraph10, 1:Results:paragraph16. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC4", "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "engineered mouse worm and cell models", "decisive_perturbation": true, "endogenous": false, "direction": "supports", "what_it_shows": "5XFAD resists Salmonella; transformed-cell conditioned medium at reported CSF-range 2–20 ng/ml inhibits adhesion and agglutinates Candida, reduced by Aβ immunodepletion.", "what_it_does_not_show": "APP-null mortality is only a trend (P=0.10), with no native-dose rescue in examined Results. Engineered secretion, inoculation and APP pleiotropy do not establish adult CNS Aβ necessity.", "confounders_present": [ "APP-null mortality is only a trend (P=0.10), with no native-dose rescue in examined Results. Engineered secretion, inoculation and APP pleiotropy do not establish adult CNS Aβ necessity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [ "Related 5XFAD and H4/CHO platforms recur in PMID30001512." ] }, { "n": 3, "pmid": "30001512", "title": "Alzheimer's Disease-Associated β-Amyloid Is Rapidly Seeded by Herpesviridae to Protect against Brain Infection.", "citation": "Eimer WA, Vijaya Kumar DK, Navalpur Shanmugam NK et al. Alzheimer's Disease-Associated β-Amyloid Is Rapidly Seeded by Herpesviridae to Protect against Brain Infection. Neuron. 2018.", "doi": "10.1016/j.neuron.2018.06.030", "pmcid": "PMC6075814", "url": "https://pubmed.ncbi.nlm.nih.gov/30001512/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/30001512/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "ErratumIn: PMID30571943" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID30001512", "access_depth": "full_text_partial", "access_note": "Complete primary abstract and linked-status metadata examined. Selected body sections: 1:RESULTS:paragraph1, 1:RESULTS:paragraph2, 1:RESULTS:paragraph7, 1:RESULTS:paragraph8, 6:METHOD DETAILS:paragraph0, 6:METHOD DETAILS:paragraph1, 6:METHOD DETAILS:paragraph4, 6:METHOD DETAILS:paragraph6. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "engineered mouse and 3D human neural culture", "decisive_perturbation": true, "endogenous": false, "direction": "supports", "what_it_shows": "Herpesvirus glycoprotein binding accelerates deposition and protective entrapment in model systems.", "what_it_does_not_show": "Female 5XFAD overexpression and engineered cultures constrain inference. Examined PMC Methods contain conflicting injection units; correction PMID30571943 metadata is verified but body unavailable, so exact inoculum is not asserted. HSV protection is contradicted elsewhere.", "confounders_present": [ "Female 5XFAD overexpression and engineered cultures constrain inference. Examined PMC Methods contain conflicting injection units; correction PMID30571943 metadata is verified but body unavailable, so exact inoculum is not asserted. HSV protection is contradicted elsewhere." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": true, "supporting_count": 23, "mentioning_count": 600, "contrasting_count": 14, "notable_contrasting_statements": [], "note": "Provider-indexed aggregate citation counts and selected outgoing references, not an incoming contradiction-body audit or quality score." }, "shared_components": [ "5XFAD and transformed H4/CHO platforms also used in PMID27225182; shared overexpression failure mode." ] }, { "n": 4, "pmid": "25376108", "title": "β-Amyloid peptides display protective activity against the human Alzheimer's disease-associated herpes simplex virus-1.", "citation": "Bourgade K, Garneau H, Giroux G et al. β-Amyloid peptides display protective activity against the human Alzheimer's disease-associated herpes simplex virus-1. Biogerontology. 2015.", "doi": "10.1007/s10522-014-9538-8", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/25376108/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/25376108/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID25376108", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "cell culture and cell-free virus assays", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Aβ inhibits HSV entry with pre- or co-treatment but not later dosing; adenovirus is not inhibited.", "what_it_does_not_show": "Applied peptides and timing constrain generalization; no endogenous infection-rescue test or plaque outcome.", "confounders_present": [ "Applied peptides and timing constrain generalization; no endogenous infection-rescue test or plaque outcome." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 5, "pmid": "26836158", "title": "Protective Effect of Amyloid-β Peptides Against Herpes Simplex Virus-1 Infection in a Neuronal Cell Culture Model.", "citation": "Bourgade K, Le Page A, Bocti C et al. Protective Effect of Amyloid-β Peptides Against Herpes Simplex Virus-1 Infection in a Neuronal Cell Culture Model. Journal of Alzheimer's disease : JAD. 2016.", "doi": "10.3233/JAD-150652", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/26836158/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/26836158/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID26836158", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "neuroglioma glioblastoma coculture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HSV-induced conditioned medium confers Aβ-dependent protection against secondary replication.", "what_it_does_not_show": "Transformed cell secretion and conditioned-medium transfer cannot establish wild-type CNS necessity or physiological brain concentration.", "confounders_present": [ "Transformed cell secretion and conditioned-medium transfer cannot establish wild-type CNS necessity or physiological brain concentration." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 6, "pmid": "20683212", "title": "Acyclovir or Aβ42 peptides attenuate HSV-1-induced miRNA-146a levels in human primary brain cells.", "citation": "Lukiw WJ, Cui JG, Yuan LY et al. Acyclovir or Aβ42 peptides attenuate HSV-1-induced miRNA-146a levels in human primary brain cells. Neuroreport. 2010.", "doi": "10.1097/WNR.0b013e32833da51a", "pmcid": "PMC2953363", "url": "https://pubmed.ncbi.nlm.nih.gov/20683212/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/20683212/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID20683212", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "primary neural-glial culture and viral plaque assay", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Soluble Aβ42 attenuates HSV-associated miR146a and infection readouts.", "what_it_does_not_show": "Applied peptide response does not identify native dose, unique sequestration mechanism or protective plaques.", "confounders_present": [ "Applied peptide response does not identify native dose, unique sequestration mechanism or protective plaques." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 7, "pmid": "22249992", "title": "Antimicrobial activity of peptides derived from human ß-amyloid precursor protein.", "citation": "Papareddy P, Mörgelin M, Walse B et al. Antimicrobial activity of peptides derived from human ß-amyloid precursor protein. Journal of peptide science : an official publication of the European Peptide Society. 2012.", "doi": "10.1002/psc.1439", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/22249992/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/22249992/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID22249992", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC4" ], "favors_models": [], "evidence_class": "Weak", "system": "synthetic APP-fragment and membrane assays", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Cationic peptides from an APP heparin-binding region kill microbes and disrupt membranes.", "what_it_does_not_show": "These APP-derived fragments are not Aβ; APP antimicrobial function cannot automatically be credited to Aβ.", "confounders_present": [ "These APP-derived fragments are not Aβ; APP antimicrobial function cannot automatically be credited to Aβ." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 8, "pmid": "36127711", "title": "Effects and mechanism of Aβ1-42 on EV-A71 replication.", "citation": "Zhong M, Wang H, Yan H et al. Effects and mechanism of Aβ1-42 on EV-A71 replication. Virology journal. 2022.", "doi": "10.1186/s12985-022-01882-3", "pmcid": "PMC9485788", "url": "https://pubmed.ncbi.nlm.nih.gov/36127711/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36127711/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID36127711", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3" ], "favors_models": [], "evidence_class": "Weak", "system": "neural and other cell cultures", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Applied Aβ42 inhibits EV-A71 early entry with capsid/receptor binding and agglutination.", "what_it_does_not_show": "Culture doses and receptor effects do not establish native mammalian CNS protection; contrast with adenovirus shows pathogen specificity.", "confounders_present": [ "Culture doses and receptor effects do not establish native mammalian CNS protection; contrast with adenovirus shows pathogen specificity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 9, "pmid": "37594661", "title": "Alzheimer's Progenitor Amyloid-β Targets and Dissolves Microbial Amyloids and Impairs Biofilm Function.", "citation": "Ali SA, Chung KHK, Forgham H et al. Alzheimer's Progenitor Amyloid-β Targets and Dissolves Microbial Amyloids and Impairs Biofilm Function. Advanced science (Weinheim, Baden-Wurttemberg, Germany). 2023.", "doi": "10.1002/advs.202301423", "pmcid": "PMC10582422", "url": "https://pubmed.ncbi.nlm.nih.gov/37594661/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37594661/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID37594661", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3", "SC5" ], "favors_models": [], "evidence_class": "Weak", "system": "biophysical cell and zebrafish injection systems", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Aβ remodels bacterial amyloids and impairs adhesion; tail-injected fibrils colocalize with Aβ in fish.", "what_it_does_not_show": "Injected peripheral fibrils are distinct from CNS plaques; remodeled FapC remains toxic to SH-SY5Y cells.", "confounders_present": [ "Injected peripheral fibrils are distinct from CNS plaques; remodeled FapC remains toxic to SH-SY5Y cells." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 10, "pmid": "38438446", "title": "Mechanistic insights into the role of amyloid-β in innate immunity.", "citation": "Prosswimmer T, Heng A, Daggett V. Mechanistic insights into the role of amyloid-β in innate immunity. Scientific reports. 2024.", "doi": "10.1038/s41598-024-55423-9", "pmcid": "PMC10912764", "url": "https://pubmed.ncbi.nlm.nih.gov/38438446/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38438446/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID38438446", "access_depth": "full_text_partial", "access_note": "Complete primary abstract and linked-status metadata examined. Selected body sections: 4:Materials and methods:paragraph3, 4:Materials and methods:paragraph5, 4:Materials and methods:paragraph7, 1:Results. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3", "SC5" ], "favors_models": [], "evidence_class": "Weak", "system": "E. coli and biochemical cell systems", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "At 7.5 µM, Aβ oligomers shift bacteria from biofilm to planktonic phase without significant total-density loss and increase gentamicin susceptibility; curli-null control lacks these effects.", "what_it_does_not_show": "The neuronal oligomer reduction with curli deletion is nonsignificant (P=0.07). Redistribution is not direct killing; applied micromolar peptide and antibiotic synergy do not establish native CNS necessity.", "confounders_present": [ "The neuronal oligomer reduction with curli deletion is nonsignificant (P=0.07). Redistribution is not direct killing; applied micromolar peptide and antibiotic synergy do not establish native CNS necessity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 11, "pmid": "40731182", "title": "Human amylin is a potent antimicrobial peptide that exhibits antimicrobial synergism with the amyloid beta protein.", "citation": "Vijaya Kumar DK, Mitchell TA, Tailor BA et al. Human amylin is a potent antimicrobial peptide that exhibits antimicrobial synergism with the amyloid beta protein. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2025.", "doi": "10.1002/alz.70490", "pmcid": "PMC12307129", "url": "https://pubmed.ncbi.nlm.nih.gov/40731182/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40731182/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID40731182", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "synthetic and cell-derived peptides in culture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Amylin and Aβ interact synergistically against bacteria including in 3D neural cultures.", "what_it_does_not_show": "Amylin is the main tested effector; no endogenous mammalian CNS Aβ loss/rescue or human plaque outcome.", "confounders_present": [ "Amylin is the main tested effector; no endogenous mammalian CNS Aβ loss/rescue or human plaque outcome." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 12, "pmid": "33028637", "title": "Amyloid precursor protein is a restriction factor that protects against Zika virus infection in mammalian brains.", "citation": "Lingel A, Lin H, Gavriel Y et al. Amyloid precursor protein is a restriction factor that protects against Zika virus infection in mammalian brains. The Journal of biological chemistry. 2020.", "doi": "10.1074/jbc.RA120.015165", "pmcid": "PMC7863900", "url": "https://pubmed.ncbi.nlm.nih.gov/33028637/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33028637/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID33028637", "access_depth": "full_text_partial", "access_note": "Complete primary abstract and linked-status metadata examined. Selected body sections: Scite linear original body offset0 length8000: Introduction and first Results, truncated at next paragraph. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Strong", "system": "APP knockout neonatal mice and human progenitor cells", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "APP loss or blockade increases Zika replication and neonatal mouse mortality; APP acts as a decoy receptor.", "what_it_does_not_show": "APP extracellular receptor function is distinct from cleaved Aβ antimicrobial activity; neonatal Zika cannot establish Aβ necessity in adult AD.", "confounders_present": [ "APP extracellular receptor function is distinct from cleaved Aβ antimicrobial activity; neonatal Zika cannot establish Aβ necessity in adult AD." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": true, "supporting_count": 0, "mentioning_count": 12, "contrasting_count": 0, "notable_contrasting_statements": [], "note": "Provider-indexed aggregate citation counts and selected outgoing references, not an incoming contradiction-body audit or quality score." }, "shared_components": [] }, { "n": 13, "pmid": "34052228", "title": "Alzheimer's disease-associated β-amyloid does not protect against herpes simplex virus 1 infection in the mouse brain.", "citation": "Bocharova O, Pandit NP, Molesworth K et al. Alzheimer's disease-associated β-amyloid does not protect against herpes simplex virus 1 infection in the mouse brain. The Journal of biological chemistry. 2021.", "doi": "10.1016/j.jbc.2021.100845", "pmcid": "PMC8214219", "url": "https://pubmed.ncbi.nlm.nih.gov/34052228/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34052228/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID34052228", "access_depth": "full_text_partial", "access_note": "Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Results:paragraph0, 0:Results:paragraph2, 0:Results:paragraph13, 0:Results:paragraph14, 0:Results:paragraph15, 0:Results:paragraph16, 0:Results:paragraph18, 0:Results:paragraph20, 0:Results:paragraph23. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC5" ], "favors_models": [], "evidence_class": "Strong", "system": "5XFAD mice across ages strains and doses", "decisive_perturbation": true, "endogenous": false, "direction": "contradicts", "what_it_shows": "5XFAD fails to protect against HSV; abundant plaques lack viral particles, and aged survival differences are nonsignificant.", "what_it_does_not_show": "Anti-gB T111 cross-reacts with plaques in uninfected controls; anti-gD/H do not show viral entrapment. Model and acute route constrain scope, but sex-only and dose/age analyses also fail significant survival protection.", "confounders_present": [ "Anti-gB T111 cross-reacts with plaques in uninfected controls; anti-gD/H do not show viral entrapment. Model and acute route constrain scope, but sex-only and dose/age analyses also fail significant survival protection." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 14, "pmid": "38143354", "title": "Herpes Simplex Virus 1 Infection Does Not Increase Amyloid-β Pathology in APP/PS1 Mice.", "citation": "Lapeyre L, Piret J, Rhéaume C et al. Herpes Simplex Virus 1 Infection Does Not Increase Amyloid-β Pathology in APP/PS1 Mice. Journal of Alzheimer's disease : JAD. 2024.", "doi": "10.3233/JAD-230746", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/38143354/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38143354/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID38143354", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC5" ], "favors_models": [], "evidence_class": "Strong", "system": "APP/PS1 intranasal HSV mouse model", "decisive_perturbation": true, "endogenous": false, "direction": "contradicts", "what_it_shows": "HSV infection does not increase plaque number or volume, with similar disease and survival across genotypes.", "what_it_does_not_show": "One strain route and baseline model do not refute all infection-triggered amyloidosis; negative result constrains generality.", "confounders_present": [ "One strain route and baseline model do not refute all infection-triggered amyloidosis; negative result constrains generality." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 15, "pmid": "32413239", "title": "Virulent Pseudomonas aeruginosa infection converts antimicrobial amyloids into cytotoxic prions.", "citation": "Voth S, Gwin M, Francis CM et al. Virulent Pseudomonas aeruginosa infection converts antimicrobial amyloids into cytotoxic prions. FASEB journal : official publication of the Federation of American Societies for Experimental Biology. 2020.", "doi": "10.1096/fj.202000051RRR", "pmcid": "PMC7383673", "url": "https://pubmed.ncbi.nlm.nih.gov/32413239/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32413239/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID32413239", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "lung endothelial bacterial infection culture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Pseudomonas effectors shift host amyloids from antimicrobial to cytotoxic activity.", "what_it_does_not_show": "Peripheral endothelial amyloids include Aβ and tau; no CNS Aβ-specific necessity or uniformly protective response.", "confounders_present": [ "Peripheral endothelial amyloids include Aβ and tau; no CNS Aβ-specific necessity or uniformly protective response." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 16, "pmid": "33098544", "title": "Identification of Microbiota within Aβ Plaque in APP/PS1 Transgenic Mouse.", "citation": "Cao J, Wang M, Gong C et al. Identification of Microbiota within Aβ Plaque in APP/PS1 Transgenic Mouse. Journal of molecular neuroscience : MN. 2021.", "doi": "10.1007/s12031-020-01715-4", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/33098544/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33098544/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID33098544", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Weak", "system": "APP/PS1 mouse brain sequencing", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Aβ-positive tissues contain more bacterial sequence relative abundance alongside barrier permeability changes.", "what_it_does_not_show": "Low-biomass contamination and barrier failure can explain association; sequence presence does not show viable entrapment or survival benefit.", "confounders_present": [ "Low-biomass contamination and barrier failure can explain association; sequence presence does not show viable entrapment or survival benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 17, "pmid": "31907335", "title": "Dysregulation of antimicrobial peptide expression distinguishes Alzheimer's disease from normal aging.", "citation": "Wang M, Peng IF, Li S et al. Dysregulation of antimicrobial peptide expression distinguishes Alzheimer's disease from normal aging. Aging. 2020.", "doi": "10.18632/aging.102650", "pmcid": "PMC6977672", "url": "https://pubmed.ncbi.nlm.nih.gov/31907335/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31907335/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID31907335", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Weak", "system": "Drosophila aging and Aβ42 model", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "AMP expression and Aβ42 covary with age differently in AD flies.", "what_it_does_not_show": "AMP transcription is not Aβ antimicrobial function; correlations do not identify infection initiation or protection.", "confounders_present": [ "AMP transcription is not Aβ antimicrobial function; correlations do not identify infection initiation or protection." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 18, "pmid": "30746447", "title": "Porphyromonas gingivalis in Alzheimer's disease brains: Evidence for disease causation and treatment with small-molecule inhibitors.", "citation": "Dominy SS, Lynch C, Ermini F et al. Porphyromonas gingivalis in Alzheimer's disease brains: Evidence for disease causation and treatment with small-molecule inhibitors. Science advances. 2019.", "doi": "10.1126/sciadv.aau3333", "pmcid": "PMC6357742", "url": "https://pubmed.ncbi.nlm.nih.gov/30746447/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/30746447/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID30746447", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5", "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human postmortem and oral infection mice", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Gingipains associate with AD pathology; infection induces Aβ and inhibition reduces bacterial load, inflammation and neuronal injury.", "what_it_does_not_show": "Human association is postmortem; lowering Aβ after pathogen treatment does not establish Aβ entrapment as protective or necessary.", "confounders_present": [ "Human association is postmortem; lowering Aβ after pathogen treatment does not establish Aβ entrapment as protective or necessary." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 19, "pmid": "30870531", "title": "Recurrent herpes simplex virus-1 infection induces hallmarks of neurodegeneration and cognitive deficits in mice.", "citation": "De Chiara G, Piacentini R, Fabiani M et al. Recurrent herpes simplex virus-1 infection induces hallmarks of neurodegeneration and cognitive deficits in mice. PLoS pathogens. 2019.", "doi": "10.1371/journal.ppat.1007617", "pmcid": "PMC6417650", "url": "https://pubmed.ncbi.nlm.nih.gov/30870531/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/30870531/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID30870531", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "repeated HSV reactivation mice", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Repeated thermal reactivation produces Aβ, tau changes and progressive cognitive deficits.", "what_it_does_not_show": "Stress, inflammation and direct viral injury remain alternatives; no Aβ-specific perturbation separates mediator from response.", "confounders_present": [ "Stress, inflammation and direct viral injury remain alternatives; no Aβ-specific perturbation separates mediator from response." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 20, "pmid": "31866416", "title": "HHV-6A infection dysregulates autophagy/UPR interplay increasing beta amyloid production and tau phosphorylation in astrocytoma cells as well as in primary neurons, possible molecular mechanisms linking viral infection to Alzheimer's disease.", "citation": "Romeo MA, Gilardini Montani MS, Gaeta A et al. HHV-6A infection dysregulates autophagy/UPR interplay increasing beta amyloid production and tau phosphorylation in astrocytoma cells as well as in primary neurons, possible molecular mechanisms linking viral infection to Alzheimer's disease. Biochimica et biophysica acta. Molecular basis of disease. 2020.", "doi": "10.1016/j.bbadis.2019.165647", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/31866416/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31866416/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID31866416", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "HHV6A astrocytoma and primary neuron cultures", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Infection disrupts autophagy and UPR with increased Aβ and tau phosphorylation.", "what_it_does_not_show": "Stress pathways offer an indirect deposition mechanism; no native host survival or plaque benefit test.", "confounders_present": [ "Stress pathways offer an indirect deposition mechanism; no native host survival or plaque benefit test." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 21, "pmid": "35530117", "title": "Intracerebral Infection with E. coli Impairs Spatial Learning and Induces Necrosis of Hippocampal Neurons in the Tg2576 Mouse Model of Alzheimer's Disease.", "citation": "Schütze S, Döpke A, Kellert B et al. Intracerebral Infection with E. coli Impairs Spatial Learning and Induces Necrosis of Hippocampal Neurons in the Tg2576 Mouse Model of Alzheimer's Disease. Journal of Alzheimer's disease reports. 2022.", "doi": "10.3233/ADR-210049", "pmcid": "PMC9028720", "url": "https://pubmed.ncbi.nlm.nih.gov/35530117/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35530117/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID35530117", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "intracerebral E. coli aged Tg2576 mice", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Infection worsens learning and neuronal necrosis in transgenic mice without altered Aβ concentrations.", "what_it_does_not_show": "Acute inoculation plus ceftriaxone is distinct from chronic human infection; deposition is not an obligatory accompaniment.", "confounders_present": [ "Acute inoculation plus ceftriaxone is distinct from chronic human infection; deposition is not an obligatory accompaniment." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 22, "pmid": "20863379", "title": "Immunohistological detection of Chlamydia pneumoniae in the Alzheimer's disease brain.", "citation": "Hammond CJ, Hallock LR, Howanski RJ et al. Immunohistological detection of Chlamydia pneumoniae in the Alzheimer's disease brain. BMC neuroscience. 2010.", "doi": "10.1186/1471-2202-11-121", "pmcid": "PMC2949767", "url": "https://pubmed.ncbi.nlm.nih.gov/20863379/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/20863379/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID20863379", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Weak", "system": "human postmortem small case-control", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Chlamydial antigens occur near AD pathology but Thioflavin overlays show no direct plaque colocalization.", "what_it_does_not_show": "Small sample and antibody specificity limits; regional proximity is not entrapment or protective action.", "confounders_present": [ "Small sample and antibody specificity limits; regional proximity is not entrapment or protective action." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 23, "pmid": "18829386", "title": "Initial characterization of Chlamydophila (Chlamydia) pneumoniae cultured from the late-onset Alzheimer brain.", "citation": "Dreses-Werringloer U, Bhuiyan M, Zhao Y et al. Initial characterization of Chlamydophila (Chlamydia) pneumoniae cultured from the late-onset Alzheimer brain. International journal of medical microbiology : IJMM. 2009.", "doi": "10.1016/j.ijmm.2008.07.002", "pmcid": "PMC2730674", "url": "https://pubmed.ncbi.nlm.nih.gov/18829386/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18829386/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID18829386", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "two human brain isolates and culture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Culturable PCR-confirmed C. pneumoniae isolates were obtained from two AD brains.", "what_it_does_not_show": "Small selected samples and earlier laboratory series do not establish population frequency, timing or plaque protective function.", "confounders_present": [ "Small selected samples and earlier laboratory series do not establish population frequency, timing or plaque protective function." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [ "Same Chlamydia laboratory programme as PMID9749980; exact donor overlap is not established." ] }, { "n": 24, "pmid": "15998578", "title": "The load of Chlamydia pneumoniae in the Alzheimer's brain varies with APOE genotype.", "citation": "Gérard HC, Wildt KL, Whittum-Hudson JA et al. The load of Chlamydia pneumoniae in the Alzheimer's brain varies with APOE genotype. Microbial pathogenesis. 2005.", "doi": "10.1016/j.micpath.2005.05.002", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/15998578/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/15998578/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID15998578", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Weak", "system": "human postmortem APOE-stratified tissue", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "C. pneumoniae load is higher in APOE4-bearing AD tissue.", "what_it_does_not_show": "Cross-sectional genotype association cannot distinguish impaired clearance, susceptibility or protective amyloid function.", "confounders_present": [ "Cross-sectional genotype association cannot distinguish impaired clearance, susceptibility or protective amyloid function." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [ "Related Chlamydia laboratory brain series; independence of all tissue samples is unconfirmed." ] }, { "n": 25, "pmid": "15013562", "title": "Chlamydia pneumoniae induces Alzheimer-like amyloid plaques in brains of BALB/c mice.", "citation": "Little CS, Hammond CJ, MacIntyre A et al. Chlamydia pneumoniae induces Alzheimer-like amyloid plaques in brains of BALB/c mice. Neurobiology of aging. 2004.", "doi": "10.1016/S0197-4580(03)00127-1", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/15013562/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/15013562/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID15013562", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "nontransgenic BALB/c intranasal infection", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "C. pneumoniae infection precedes increased Aβ42-immunoreactive deposits, some Thioflavin-positive.", "what_it_does_not_show": "Biomarker deposition is distinct from AD neurodegeneration and antimicrobial benefit; strain and histology specificity matter.", "confounders_present": [ "Biomarker deposition is distinct from AD neurodegeneration and antimicrobial benefit; strain and histology specificity matter." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 26, "pmid": "9749980", "title": "Identification and localization of Chlamydia pneumoniae in the Alzheimer's brain.", "citation": "Balin BJ, Gérard HC, Arking EJ et al. Identification and localization of Chlamydia pneumoniae in the Alzheimer's brain. Medical microbiology and immunology. 1998.", "doi": "10.1007/s004300050071", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/9749980/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/9749980/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID9749980", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human postmortem PCR microscopy culture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Multiple assays detect viable transcriptionally active C. pneumoniae in a small AD series versus controls.", "what_it_does_not_show": "Other laboratories report null detections; no prospective chronology or plaque-specific benefit measurement.", "confounders_present": [ "Other laboratories report null detections; no prospective chronology or plaque-specific benefit measurement." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 27, "pmid": "41571675", "title": "Identification of Chlamydia pneumoniae and NLRP3 inflammasome activation in Alzheimer's disease retina.", "citation": "Gaire BP, Koronyo Y, Vit JP et al. Identification of Chlamydia pneumoniae and NLRP3 inflammasome activation in Alzheimer's disease retina. Nature communications. 2026.", "doi": "10.1038/s41467-026-68580-4", "pmcid": "PMC12827417", "url": "https://pubmed.ncbi.nlm.nih.gov/41571675/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41571675/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "UpdateOf: PMID40667156", "UpdateOf: PMID40678205" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "Chlamydia-retina-final-publication", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5", "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human retina brain and engineered mouse/culture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "C. pneumoniae associates with Aβ42 and inflammation; infection worsens cognition in a model.", "what_it_does_not_show": "Disease-amplifying association and model effect do not identify protective Aβ; linked update records are not independent reports.", "confounders_present": [ "Disease-amplifying association and model effect do not identify protective Aβ; linked update records are not independent reports." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [ "Updates preprints PMID40667156 and PMID40678205; not additional primary counted reports." ] }, { "n": 28, "pmid": "26984535", "title": "Chronic Toxoplasma gondii infection enhances β-amyloid phagocytosis and clearance by recruited monocytes.", "citation": "Möhle L, Israel N, Paarmann K et al. Chronic Toxoplasma gondii infection enhances β-amyloid phagocytosis and clearance by recruited monocytes. Acta neuropathologica communications. 2016.", "doi": "10.1186/s40478-016-0293-8", "pmcid": "PMC4793516", "url": "https://pubmed.ncbi.nlm.nih.gov/26984535/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/26984535/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID26984535", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Strong", "system": "5XFAD Toxoplasma infection and monocyte ablation", "decisive_perturbation": true, "endogenous": true, "direction": "contradicts", "what_it_shows": "Infection reduces plaque burden through recruited monocytes; monocyte ablation increases Aβ.", "what_it_does_not_show": "Immune clearance can oppose deposition, showing pathogen specificity; plaque reduction alone does not measure net cognitive protection.", "confounders_present": [ "Immune clearance can oppose deposition, showing pathogen specificity; plaque reduction alone does not measure net cognitive protection." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 29, "pmid": "41547853", "title": "Toxoplasma gondii drives myeloid immune cell recruitment to amyloid plaques in Alzheimer's model mice.", "citation": "Yanes KJO, Bui CT, Tomasello J et al. Toxoplasma gondii drives myeloid immune cell recruitment to amyloid plaques in Alzheimer's model mice. Journal of neuroinflammation. 2026.", "doi": "10.1186/s12974-025-03666-2", "pmcid": "PMC12896096", "url": "https://pubmed.ncbi.nlm.nih.gov/41547853/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41547853/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID41547853", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "5XFAD infection and marrow lineage tracing", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Toxoplasma infection reduces plaques and recruits activated myeloid cells and T cells.", "what_it_does_not_show": "Shares infection/5XFAD paradigm with earlier work; lineage tracing is not Aβ-specific necessity or human causation.", "confounders_present": [ "Shares infection/5XFAD paradigm with earlier work; lineage tracing is not Aβ-specific necessity or human causation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 30, "pmid": "1649907", "title": "Latent herpes simplex virus type 1 in normal and Alzheimer's disease brains.", "citation": "Jamieson GA, Maitland NJ, Wilcock GK et al. Latent herpes simplex virus type 1 in normal and Alzheimer's disease brains. Journal of medical virology. 1991.", "doi": "10.1002/jmv.1890330403", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/1649907/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/1649907/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID1649907", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Weak", "system": "human postmortem PCR", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "HSV DNA is found in both AD and normal brains with controls for amplification.", "what_it_does_not_show": "Latent DNA presence does not distinguish active infection, etiologic timing or protective plaques.", "confounders_present": [ "Latent DNA presence does not distinguish active infection, etiologic timing or protective plaques." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 31, "pmid": "18973185", "title": "Herpes simplex virus type 1 DNA is located within Alzheimer's disease amyloid plaques.", "citation": "Wozniak MA, Mee AP, Itzhaki RF. Herpes simplex virus type 1 DNA is located within Alzheimer's disease amyloid plaques. The Journal of pathology. 2009.", "doi": "10.1002/path.2449", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/18973185/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18973185/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID18973185", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human postmortem in situ PCR histology", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HSV DNA is plaque-associated in AD and aged normal tissue, with greater plaque association in AD.", "what_it_does_not_show": "DNA localization does not measure viable trapped viruses, temporal initiation or protective tissue outcomes; aged normals also show plaque-associated DNA.", "confounders_present": [ "DNA localization does not measure viable trapped viruses, temporal initiation or protective tissue outcomes; aged normals also show plaque-associated DNA." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 32, "pmid": "27664135", "title": "HSV presence in brains of individuals without dementia: the TASTY brain series.", "citation": "Olsson J, Lövheim H, Honkala E et al. HSV presence in brains of individuals without dementia: the TASTY brain series. Disease models & mechanisms. 2016.", "doi": "10.1242/dmm.026674", "pmcid": "PMC5117234", "url": "https://pubmed.ncbi.nlm.nih.gov/27664135/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/27664135/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID27664135", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "584 human autopsy brains PCR", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "HSV is detected in a small minority of brains, and most Aβ-positive brains lack detected HSV.", "what_it_does_not_show": "Regional sampling and low burden affect sensitivity; presence or absence alone does not test Aβ antimicrobial function.", "confounders_present": [ "Regional sampling and low burden affect sensitivity; presence or absence alone does not test Aβ antimicrobial function." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 33, "pmid": "31983538", "title": "Human Herpesvirus 6 Detection in Alzheimer's Disease Cases and Controls across Multiple Cohorts.", "citation": "Allnutt MA, Johnson K, Bennett DA et al. Human Herpesvirus 6 Detection in Alzheimer's Disease Cases and Controls across Multiple Cohorts. Neuron. 2020.", "doi": "10.1016/j.neuron.2019.12.031", "pmcid": "PMC7182308", "url": "https://pubmed.ncbi.nlm.nih.gov/31983538/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31983538/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID31983538", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human repositories RNA sequencing and PCR", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "HHV6 lacks AD specificity across multiple brain repositories and assays.", "what_it_does_not_show": "Negative detection constrains common pathogen association; cannot exclude other pathogens, remote cleared infection or restricted subgroups.", "confounders_present": [ "Negative detection constrains common pathogen association; cannot exclude other pathogens, remote cleared infection or restricted subgroups." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 34, "pmid": "35033173", "title": "Murine roseolovirus does not accelerate amyloid-β pathology and human roseoloviruses are not over-represented in Alzheimer disease brains.", "citation": "Bigley TM, Xiong M, Ali M et al. Murine roseolovirus does not accelerate amyloid-β pathology and human roseoloviruses are not over-represented in Alzheimer disease brains. Molecular neurodegeneration. 2022.", "doi": "10.1186/s13024-021-00514-8", "pmcid": "PMC8760754", "url": "https://pubmed.ncbi.nlm.nih.gov/35033173/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35033173/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID35033173", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC5", "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "murine roseolovirus infection and human brain sequencing", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Aβ-virus interaction inhibits infection in vitro but infection does not increase plaques; human roseoloviruses are not overrepresented.", "what_it_does_not_show": "In vitro binding need not produce endogenous deposition; murine virus is an analogue and cohort sequencing shares assay limits.", "confounders_present": [ "In vitro binding need not produce endogenous deposition; murine virus is an analogue and cohort sequencing shares assay limits." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 35, "pmid": "32336252", "title": "Reanalysis of Alzheimer's brain sequencing data reveals absence of purported HHV6A and HHV7.", "citation": "Chorlton SD. Reanalysis of Alzheimer's brain sequencing data reveals absence of purported HHV6A and HHV7. Journal of bioinformatics and computational biology. 2020.", "doi": "10.1142/S0219720020500122", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/32336252/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32336252/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "Readhead-sequencing-series-reanalysis", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "reanalysis of human brain sequencing", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Alternative sequence analysis finds very few HHV6A reads and no HHV7, identifying specificity problems.", "what_it_does_not_show": "Same underlying data as Readhead; a methodological challenge rather than an independent biological cohort.", "confounders_present": [ "Same underlying data as Readhead; a methodological challenge rather than an independent biological cohort." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [ "Reanalysis of PMID29937276 underlying sequence data; distinct analysis, not independent samples." ] }, { "n": 36, "pmid": "29937276", "title": "Multiscale Analysis of Independent Alzheimer's Cohorts Finds Disruption of Molecular, Genetic, and Clinical Networks by Human Herpesvirus.", "citation": "Readhead B, Haure-Mirande JV, Funk CC et al. Multiscale Analysis of Independent Alzheimer's Cohorts Finds Disruption of Molecular, Genetic, and Clinical Networks by Human Herpesvirus. Neuron. 2018.", "doi": "10.1016/j.neuron.2018.05.023", "pmcid": "PMC6551233", "url": "https://pubmed.ncbi.nlm.nih.gov/29937276/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29937276/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "Readhead-sequencing-series", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human postmortem multiomics cohorts", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Original pipeline reports increased HHV6A/7 and networks involving APP metabolism in AD.", "what_it_does_not_show": "Postmortem networks do not establish infection timing; specificity is directly challenged by reanalysis and subsequent detection studies.", "confounders_present": [ "Postmortem networks do not establish infection timing; specificity is directly challenged by reanalysis and subsequent detection studies." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 37, "pmid": "41853978", "title": "Herpesvirus genome integration in whole-genome sequences of dementia and control cohorts.", "citation": "Piotrowski SL, Allnutt MA, Johnson K et al. Herpesvirus genome integration in whole-genome sequences of dementia and control cohorts. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2026.", "doi": "10.1002/alz.71047", "pmcid": "PMC13093769", "url": "https://pubmed.ncbi.nlm.nih.gov/41853978/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41853978/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID41853978", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human dementia and control whole genomes", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Partial HHV6 integration signals are more prevalent in synucleinopathy cohorts rather than broadly across dementias.", "what_it_does_not_show": "Integrated segments do not establish active AD infection or plaque entrapment; cohort and ancestry effects remain possible.", "confounders_present": [ "Integrated segments do not establish active AD infection or plaque entrapment; cohort and ancestry effects remain possible." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 38, "pmid": "9014911", "title": "Herpes simplex virus type 1 in brain and risk of Alzheimer's disease.", "citation": "Itzhaki RF, Lin WR, Shang D et al. Herpes simplex virus type 1 in brain and risk of Alzheimer's disease. Lancet (London, England). 1997.", "doi": "10.1016/S0140-6736(96)10149-5", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/9014911/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/9014911/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID9014911", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human postmortem and APOE case-control", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HSV-positive APOE4 carriers show an AD association in a small case-control series.", "what_it_does_not_show": "Large odds ratio with wide interval is not a plaque protection measurement, prospective cause or population necessity.", "confounders_present": [ "Large odds ratio with wide interval is not a plaque protection measurement, prospective cause or population necessity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 39, "pmid": "35177758", "title": "Chlamydia pneumoniae can infect the central nervous system via the olfactory and trigeminal nerves and contributes to Alzheimer's disease risk.", "citation": "Chacko A, Delbaz A, Walkden H et al. Chlamydia pneumoniae can infect the central nervous system via the olfactory and trigeminal nerves and contributes to Alzheimer's disease risk. Scientific reports. 2022.", "doi": "10.1038/s41598-022-06749-9", "pmcid": "PMC8854390", "url": "https://pubmed.ncbi.nlm.nih.gov/35177758/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35177758/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID35177758", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "intranasal C. pneumoniae mice and glial culture", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Live organisms traverse olfactory/trigeminal paths and Aβ accumulates near inclusions.", "what_it_does_not_show": "Adjacency after experimental exposure is not entrapment-mediated protection or spontaneous human AD.", "confounders_present": [ "Adjacency after experimental exposure is not entrapment-mediated protection or spontaneous human AD." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 40, "pmid": "17581756", "title": "Detection of amyloid beta aggregates in the brain of BALB/c mice after Chlamydia pneumoniae infection.", "citation": "Boelen E, Stassen FR, van der Ven AJ et al. Detection of amyloid beta aggregates in the brain of BALB/c mice after Chlamydia pneumoniae infection. Acta neuropathologica. 2007.", "doi": "10.1007/s00401-007-0252-3", "pmcid": "PMC2039821", "url": "https://pubmed.ncbi.nlm.nih.gov/17581756/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/17581756/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID17581756", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Strong", "system": "BALB/c intranasal infection replication", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Extracellular Aβ immunoreactivity also occurs in mock and untouched animals and differs from transgenic plaques.", "what_it_does_not_show": "Assay and strain differences require reconciliation; these data do not unequivocally support infection-induced AD-like plaques.", "confounders_present": [ "Assay and strain differences require reconciliation; these data do not unequivocally support infection-induced AD-like plaques." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 41, "pmid": "25538615", "title": "Detection of bacterial antigens and Alzheimer's disease-like pathology in the central nervous system of BALB/c mice following intranasal infection with a laboratory isolate of Chlamydia pneumoniae.", "citation": "Little CS, Joyce TA, Hammond CJ et al. Detection of bacterial antigens and Alzheimer's disease-like pathology in the central nervous system of BALB/c mice following intranasal infection with a laboratory isolate of Chlamydia pneumoniae. Frontiers in aging neuroscience. 2014.", "doi": "10.3389/fnagi.2014.00304", "pmcid": "PMC4257355", "url": "https://pubmed.ncbi.nlm.nih.gov/25538615/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/25538615/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID25538615", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "BALB/c laboratory-strain infection", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Transient Aβ deposits follow predominantly olfactory infection and resolve as antigen burden falls.", "what_it_does_not_show": "Small cultures and strain dependence constrain inference; no demonstrated Aβ necessity or sustained AD phenotype.", "confounders_present": [ "Small cultures and strain dependence constrain inference; no demonstrated Aβ necessity or sustained AD phenotype." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 42, "pmid": "10655406", "title": "Failure to detect Chlamydia pneumoniae in brain sections of Alzheimer's disease patients.", "citation": "Gieffers J, Reusche E, Solbach W et al. Failure to detect Chlamydia pneumoniae in brain sections of Alzheimer's disease patients. Journal of clinical microbiology. 2000.", "doi": "10.1128/JCM.38.2.881-882.2000", "pmcid": "PMC86233", "url": "https://pubmed.ncbi.nlm.nih.gov/10655406/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/10655406/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID10655406", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "20 human AD brains PCR immunohistochemistry", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Neither C. pneumoniae DNA nor antigens are detected in an independent AD series.", "what_it_does_not_show": "Paraffin material and sensitivity may limit detection; contradicts common presence without proving universal absence.", "confounders_present": [ "Paraffin material and sensitivity may limit detection; contradicts common presence without proving universal absence." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 43, "pmid": "10878049", "title": "Failure to detect Chlamydia pneumoniae in the late-onset Alzheimer's brain.", "citation": "Ring RH, Lyons JM. Failure to detect Chlamydia pneumoniae in the late-onset Alzheimer's brain. Journal of clinical microbiology. 2000.", "doi": "10.1128/JCM.38.7.2591-2594.2000", "pmcid": "PMC86976", "url": "https://pubmed.ncbi.nlm.nih.gov/10878049/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/10878049/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID10878049", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human autopsy multiple regions PCR culture", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Repeated nested PCR and culture fail to unequivocally detect C. pneumoniae in AD or controls.", "what_it_does_not_show": "Stored-tissue sampling and organism burden constrain negative inference; no direct plaque functional experiment.", "confounders_present": [ "Stored-tissue sampling and organism burden constrain negative inference; no direct plaque functional experiment." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 44, "pmid": "11929559", "title": "Molecular and immunological evidence of oral Treponema in the human brain and their association with Alzheimer's disease.", "citation": "Riviere GR, Riviere KH, Smith KS. Molecular and immunological evidence of oral Treponema in the human brain and their association with Alzheimer's disease. Oral microbiology and immunology. 2002.", "doi": "10.1046/j.0902-0055.2001.00100.x", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/11929559/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/11929559/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID11929559", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human frontal cortex PCR and antibodies", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Oral Treponema DNA and antigens are more frequent in small AD samples than controls.", "what_it_does_not_show": "Postmortem presence with possible nerve route does not establish disease initiation, viable plaque trapping or host protection.", "confounders_present": [ "Postmortem presence with possible nerve route does not establish disease initiation, viable plaque trapping or host protection." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 45, "pmid": "32310171", "title": "Investigation of Potential Brain Microbiome in Alzheimer's Disease: Implications of Study Bias.", "citation": "Westfall S, Dinh DM, Pasinetti GM. Investigation of Potential Brain Microbiome in Alzheimer's Disease: Implications of Study Bias. Journal of Alzheimer's disease : JAD. 2020.", "doi": "10.3233/JAD-191328", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/32310171/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32310171/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID32310171", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "two human postmortem microbiome cohorts", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Bacterial sequence patterns vary strongly with cohort, extraction, region and postmortem interval; AD differences are limited.", "what_it_does_not_show": "Low biomass and processing biases can generate apparent brain microbial signals; no viable organism or plaque function proof.", "confounders_present": [ "Low biomass and processing biases can generate apparent brain microbial signals; no viable organism or plaque function proof." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 46, "pmid": "37459141", "title": "Donanemab in Early Symptomatic Alzheimer Disease: The TRAILBLAZER-ALZ 2 Randomized Clinical Trial.", "citation": "Sims JR, Zimmer JA, Evans CD et al. Donanemab in Early Symptomatic Alzheimer Disease: The TRAILBLAZER-ALZ 2 Randomized Clinical Trial. JAMA. 2023.", "doi": "10.1001/jama.2023.13239", "pmcid": "PMC10352931", "url": "https://pubmed.ncbi.nlm.nih.gov/37459141/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37459141/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID37459141", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human randomized intervention", "decisive_perturbation": true, "endogenous": false, "direction": "contradicts", "what_it_shows": "Donanemab clears plaque and slows decline at 76 weeks with ARIA and treatment-related deaths.", "what_it_does_not_show": "Net benefit is bounded to enrolled early AD; immune effects and no infection stratification prevent inferring every plaque is harmful or AMP function absent.", "confounders_present": [ "Net benefit is bounded to enrolled early AD; immune effects and no infection stratification prevent inferring every plaque is harmful or AMP function absent." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 47, "pmid": "36449413", "title": "Lecanemab in Early Alzheimer's Disease.", "citation": "van Dyck CH, Swanson CJ, Aisen P et al. Lecanemab in Early Alzheimer's Disease. The New England journal of medicine. 2023.", "doi": "10.1056/NEJMoa2212948", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/36449413/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36449413/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID36449413", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human randomized intervention", "decisive_perturbation": true, "endogenous": false, "direction": "contradicts", "what_it_shows": "Lecanemab lowers amyloid and yields less cognitive/functional decline with infusion reactions and ARIA.", "what_it_does_not_show": "Targets soluble protofibrils as well as aggregates; clinical improvement is modest, not prevention or proof against pathogen-specific protection.", "confounders_present": [ "Targets soluble protofibrils as well as aggregates; clinical improvement is modest, not prevention or proof against pathogen-specific protection." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 48, "pmid": "33720637", "title": "Donanemab in Early Alzheimer's Disease.", "citation": "Mintun MA, Lo AC, Duggan Evans C et al. Donanemab in Early Alzheimer's Disease. The New England journal of medicine. 2021.", "doi": "10.1056/NEJMoa2100708", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/33720637/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33720637/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID33720637", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human randomized intervention", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Phase2 donanemab improves primary iADRS but most secondary outcomes lack substantial differences.", "what_it_does_not_show": "Small early trial and ARIA limit generalization; plaque reduction does not uniquely identify a microbial mechanism.", "confounders_present": [ "Small early trial and ARIA limit generalization; plaque reduction does not uniquely identify a microbial mechanism." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 49, "pmid": "33865446", "title": "A randomized, double-blind, phase 2b proof-of-concept clinical trial in early Alzheimer's disease with lecanemab, an anti-Aβ protofibril antibody.", "citation": "Swanson CJ, Zhang Y, Dhadda S et al. A randomized, double-blind, phase 2b proof-of-concept clinical trial in early Alzheimer's disease with lecanemab, an anti-Aβ protofibril antibody. Alzheimer's research & therapy. 2021.", "doi": "10.1186/s13195-021-00813-8", "pmcid": "PMC8053280", "url": "https://pubmed.ncbi.nlm.nih.gov/33865446/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33865446/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "ErratumIn: PMID35598024" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID33865446", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "human randomized intervention", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Phase2 lecanemab misses its 12-month primary probability threshold despite positive 18-month measures.", "what_it_does_not_show": "Primary versus later secondary outcomes must remain distinct; correction metadata noted and full correction not audited.", "confounders_present": [ "Primary versus later secondary outcomes must remain distinct; correction metadata noted and full correction not audited." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 50, "pmid": "35542991", "title": "Two Randomized Phase 3 Studies of Aducanumab in Early Alzheimer's Disease.", "citation": "Budd Haeberlein S, Aisen PS, Barkhof F et al. Two Randomized Phase 3 Studies of Aducanumab in Early Alzheimer's Disease. The journal of prevention of Alzheimer's disease. 2022.", "doi": "10.14283/jpad.2022.30", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/35542991/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35542991/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "EMERGE-and-ENGAGE-report", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "two human randomized trials", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Aducanumab meets EMERGE primary endpoint but not ENGAGE despite target engagement in both.", "what_it_does_not_show": "Futility halt and discordant efficacy prevent counting two convergent successful causal lines; no infectious subgroup test.", "confounders_present": [ "Futility halt and discordant efficacy prevent counting two convergent successful causal lines; no infectious subgroup test." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 51, "pmid": "37966285", "title": "Two Phase 3 Trials of Gantenerumab in Early Alzheimer's Disease.", "citation": "Bateman RJ, Smith J, Donohue MC et al. Two Phase 3 Trials of Gantenerumab in Early Alzheimer's Disease. The New England journal of medicine. 2023.", "doi": "10.1056/NEJMoa2304430", "pmcid": "PMC10794000", "url": "https://pubmed.ncbi.nlm.nih.gov/37966285/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37966285/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "GRADUATE-I-and-II-report", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "two human randomized interventions", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Gantenerumab lowers plaques without significant slowing in either GRADUATE trial; ARIA occurs.", "what_it_does_not_show": "Incomplete clearance and antibody-specific effects constrain interpretation; null benefit does not prove plaques protective against infection.", "confounders_present": [ "Incomplete clearance and antibody-specific effects constrain interpretation; null benefit does not prove plaques protective against infection." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 52, "pmid": "37458272", "title": "Trial of Solanezumab in Preclinical Alzheimer's Disease.", "citation": "Sperling RA, Donohue MC, Raman R et al. Trial of Solanezumab in Preclinical Alzheimer's Disease. The New England journal of medicine. 2023.", "doi": "10.1056/NEJMoa2305032", "pmcid": "PMC10559996", "url": "https://pubmed.ncbi.nlm.nih.gov/37458272/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37458272/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID37458272", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human randomized preclinical intervention", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Solanezumab fails to slow decline in amyloid-positive cognitively unimpaired participants over 240 weeks.", "what_it_does_not_show": "Monomer-targeting differs from plaque clearance; no infection stratification or necessity test.", "confounders_present": [ "Monomer-targeting differs from plaque clearance; no infection stratification or necessity test." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 53, "pmid": "29719179", "title": "Randomized Trial of Verubecestat for Mild-to-Moderate Alzheimer's Disease.", "citation": "Egan MF, Kost J, Tariot PN et al. Randomized Trial of Verubecestat for Mild-to-Moderate Alzheimer's Disease. The New England journal of medicine. 2018.", "doi": "10.1056/NEJMoa1706441", "pmcid": "PMC6776074", "url": "https://pubmed.ncbi.nlm.nih.gov/29719179/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29719179/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID29719179", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC3", "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human randomized BACE1 inhibition", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Verubecestat fails to reduce cognitive or functional decline and increases adverse events.", "what_it_does_not_show": "BACE1 has other substrates and broad processing functions; drug harms cannot be assigned specifically to loss of Aβ antimicrobial defence.", "confounders_present": [ "BACE1 has other substrates and broad processing functions; drug harms cannot be assigned specifically to loss of Aβ antimicrobial defence." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 54, "pmid": "29365294", "title": "Trial of Solanezumab for Mild Dementia Due to Alzheimer's Disease.", "citation": "Honig LS, Vellas B, Woodward M et al. Trial of Solanezumab for Mild Dementia Due to Alzheimer's Disease. The New England journal of medicine. 2018.", "doi": "10.1056/NEJMoa1705971", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/29365294/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29365294/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID29365294", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "human randomized intervention", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "EXPEDITION3 fails its solanezumab primary endpoint; secondary results are descriptive after hierarchy failure.", "what_it_does_not_show": "Target species and exposure differ from successful antibodies; no infectious-protection mechanism measurement.", "confounders_present": [ "Target species and exposure differ from successful antibodies; no infectious-protection mechanism measurement." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 55, "pmid": "33049114", "title": "Cognitive outcomes in trials of two BACE inhibitors in Alzheimer's disease.", "citation": "Wessels AM, Lines C, Stern RA et al. Cognitive outcomes in trials of two BACE inhibitors in Alzheimer's disease. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2020.", "doi": "10.1002/alz.12164", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/33049114/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33049114/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID33049114", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC3", "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "secondary analysis of two human BACE trials", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Several cognitive measures worsen with two BACE inhibitors while verbal fluency improves.", "what_it_does_not_show": "Secondary endpoints and enzyme pleiotropy restrict causation; physiological Aβ functions need not be antimicrobial.", "confounders_present": [ "Secondary endpoints and enzyme pleiotropy restrict causation; physiological Aβ functions need not be antimicrobial." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [ "Secondary cognitive analyses of APECS/AMARANTH; not independent primary efficacy endpoints." ] }, { "n": 56, "pmid": "19318468", "title": "Amyloid beta mediates memory formation.", "citation": "Garcia-Osta A, Alberini CM. Amyloid beta mediates memory formation. Learning & memory (Cold Spring Harbor, N.Y.). 2009.", "doi": "10.1101/lm.1310209", "pmcid": "PMC2661754", "url": "https://pubmed.ncbi.nlm.nih.gov/19318468/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/19318468/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID19318468", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "normal mouse hippocampal functional perturbation", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Endogenous Aβ participates in memory and picomolar applied Aβ enhances consolidation.", "what_it_does_not_show": "Supports a non-antimicrobial physiological alternative; no microbial challenge or plaque protective function.", "confounders_present": [ "Supports a non-antimicrobial physiological alternative; no microbial challenge or plaque protective function." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 57, "pmid": "33926999", "title": "Amyloid-Beta Mediates Homeostatic Synaptic Plasticity.", "citation": "Galanis C, Fellenz M, Becker D et al. Amyloid-Beta Mediates Homeostatic Synaptic Plasticity. The Journal of neuroscience : the official journal of the Society for Neuroscience. 2021.", "doi": "10.1523/JNEUROSCI.1820-20.2021", "pmcid": "PMC8211553", "url": "https://pubmed.ncbi.nlm.nih.gov/33926999/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33926999/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID33926999", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC3", "SC4" ], "favors_models": [], "evidence_class": "Strong", "system": "APP-null organotypic neural culture", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Aβ rescues homeostatic synaptic strengthening in APP-null tissue whereas sAPPα does not.", "what_it_does_not_show": "A native peptide rescue exists for synaptic plasticity, distinct from infection rescue; ex vivo culture does not settle adult CNS immunity.", "confounders_present": [ "A native peptide rescue exists for synaptic plasticity, distinct from infection rescue; ex vivo culture does not settle adult CNS immunity." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 58, "pmid": "41026542", "title": "Aggregation shifts amyloid-β peptides from synaptogenic to synaptotoxic.", "citation": "Siddu A, Natale S, Wong CH et al. Aggregation shifts amyloid-β peptides from synaptogenic to synaptotoxic. The Journal of clinical investigation. 2025.", "doi": "10.1172/JCI193407", "pmcid": "PMC12700558", "url": "https://pubmed.ncbi.nlm.nih.gov/41026542/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41026542/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID41026542", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC3", "SC6" ], "favors_models": [], "evidence_class": "Weak", "system": "human neurons controlled synthetic Aβ", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Free Aβ can be synaptogenic while aggregation shifts it toward synaptotoxicity; scrambled/inverted controls are inactive.", "what_it_does_not_show": "Chemically controlled culture is distinct from native pathogen defence; aggregation-state duality argues against assuming all deposition protective.", "confounders_present": [ "Chemically controlled culture is distinct from native pathogen defence; aggregation-state duality argues against assuming all deposition protective." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 59, "pmid": "39042667", "title": "Selective suppression of oligodendrocyte-derived amyloid beta rescues neuronal dysfunction in Alzheimer's disease.", "citation": "Rajani RM, Ellingford R, Hellmuth M et al. Selective suppression of oligodendrocyte-derived amyloid beta rescues neuronal dysfunction in Alzheimer's disease. PLoS biology. 2024.", "doi": "10.1371/journal.pbio.3002727", "pmcid": "PMC11265669", "url": "https://pubmed.ncbi.nlm.nih.gov/39042667/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39042667/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID39042667", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "AD knock-in mouse selective cell-source suppression", "decisive_perturbation": false, "endogenous": false, "direction": "contradicts", "what_it_shows": "Suppressing oligodendrocyte Aβ improves neuronal function and pathology in vivo.", "what_it_does_not_show": "Secretase/cell-source perturbation is not an infection-stratified human plaque experiment; supports bounded harmful contribution.", "confounders_present": [ "Secretase/cell-source perturbation is not an infection-stratified human plaque experiment; supports bounded harmful contribution." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 60, "pmid": "23254930", "title": "NLRP3 is activated in Alzheimer's disease and contributes to pathology in APP/PS1 mice.", "citation": "Heneka MT, Kummer MP, Stutz A et al. NLRP3 is activated in Alzheimer's disease and contributes to pathology in APP/PS1 mice. Nature. 2013.", "doi": "10.1038/nature11729", "pmcid": "PMC3812809", "url": "https://pubmed.ncbi.nlm.nih.gov/23254930/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/23254930/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID23254930", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5", "SC6" ], "favors_models": [], "evidence_class": "Strong", "system": "APP/PS1 Nlrp3 or Casp1 knockout and human tissue", "decisive_perturbation": false, "endogenous": true, "direction": "null", "what_it_shows": "Inflammasome loss protects memory and enhances Aβ clearance in mice; human caspase activation is observed.", "what_it_does_not_show": "Germline immune-pathway effects do not isolate plaque toxicity or require infection; sterile amplification remains a credible alternative.", "confounders_present": [ "Germline immune-pathway effects do not isolate plaque toxicity or require infection; sterile amplification remains a credible alternative." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] }, { "n": 61, "pmid": "37416769", "title": "β-amyloid binds to microglia Dectin-1 to induce inflammatory response in the pathogenesis of Alzheimer's disease.", "citation": "Zhao X, Sun J, Xiong L et al. β-amyloid binds to microglia Dectin-1 to induce inflammatory response in the pathogenesis of Alzheimer's disease. International journal of biological sciences. 2023.", "doi": "10.7150/ijbs.81900", "pmcid": "PMC10321287", "url": "https://pubmed.ncbi.nlm.nih.gov/37416769/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37416769/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID37416769", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5", "SC6" ], "favors_models": [], "evidence_class": "Moderate", "system": "Aβ-infused mice and microglial culture", "decisive_perturbation": false, "endogenous": false, "direction": "null", "what_it_shows": "Dectin1 loss reduces Aβ-triggered inflammation and functional deficits through Syk/NFκB.", "what_it_does_not_show": "Infused peptide is a forced model; receptor-dependent sterile injury differs from endogenous AD initiation and antimicrobial defence.", "confounders_present": [ "Infused peptide is a forced model; receptor-dependent sterile injury differs from endogenous AD initiation and antimicrobial defence." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "shared_components": [] } ], "verification_summary": { "load_bearing_claims_checked": 68, "verified": 68, "unverified": 0, "contradicted": 0, "note": "Verified attribution is distinct from mechanism truth or complete body access." }, "factual_issues_found": [], "cap_rules_applied": [ { "subclaim_id": "SC1", "cap": "Γ", "cap_source": "rubric", "triggered": true, "trigger_text_quoted": "Maximum if mechanism is biologically plausible, supported by in vitro or simplified animal paradigms, but no disease-relevant necessity is shown in vivo.", "specific_trigger": "Sequence controls, immunodepletion, binding and structural assays support a real peptide-associated interaction. These experiments remain concentrated or engineered assays; the native CNS mechanism is not established.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC2", "cap": "Γ", "cap_source": "rubric", "triggered": true, "trigger_text_quoted": "Maximum if mechanism is biologically plausible, supported by in vitro or simplified animal paradigms, but no disease-relevant necessity is shown in vivo.", "specific_trigger": "Salmonella and one HSV study show survival advantages with 5XFAD expression, whereas two HSV approaches and roseolovirus challenge limit generalization. Constitutive transgenes and APP changes do not isolate native peptide causality.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC3", "cap": "Γ", "cap_source": "rubric", "triggered": true, "trigger_text_quoted": "Maximum if mechanism is biologically plausible, supported by in vitro or simplified animal paradigms, but no disease-relevant necessity is shown in vivo.", "specific_trigger": "Transformed-cell media show low-nanomolar or reported CSF-range activity, stronger than synthetic MIC alone. No selective wild-type in vivo loss with native-dose rescue establishes the corresponding physiological CNS function.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC4", "cap": "Γ", "cap_source": "rubric", "triggered": true, "trigger_text_quoted": "Maximum if mechanism is biologically plausible, supported by in vitro or simplified animal paradigms, but no disease-relevant necessity is shown in vivo.", "specific_trigger": "APP-null Salmonella mortality is nonsignificant and APP-null Zika mortality reflects a decoy-receptor function. APP-fragment activity and synaptic Aβ rescue cannot be transferred to Aβ-specific infection necessity.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC5", "cap": "Γ", "cap_source": "rubric", "triggered": true, "trigger_text_quoted": "Maximum if mechanism is biologically plausible, supported by in vitro or simplified animal paradigms, but no disease-relevant necessity is shown in vivo.", "specific_trigger": "Some infection experiments increase amyloid, while HSV, roseolovirus and BALB/c replication studies are null and Toxoplasma promotes clearance. Biomarker deposition alone does not establish disease-relevant protective dependency.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC6", "cap": "Β", "cap_source": "rubric", "triggered": true, "trigger_text_quoted": "association without temporal or perturbational proof caps at Β.", "specific_trigger": "Human pathogen/DNA colocalization and culture observations provide association, with null detections and processing effects. No examined human study establishes that plaque entrapment improves clinical or tissue outcomes; anti-amyloid clinical benefit challenges uniformly net-protective deposition.", "resulting_ceiling": "Β" } ], "cap_precedence_resolutions": [ { "collision": "Perturbation in a defined setting versus broader inference", "subclaim_scope_cap_binds_on": "Amyloid-beta is an innate antimicrobial effector, and amyloid plaque deposition in Alzheimer disease is a protective pathogen-entrapment response rather than a primary pathological lesion.", "subclaim_scope_threshold_binds_on": "The precise experimentally tested subclaim scope", "resolution": "Constitutive overexpression protection is credited as a model result, but cannot be transferred to endogenous CNS necessity. Native APP genetic protection does not clear Aβ-selective SC4. Infection-driven staining without clinical trajectory remains Γ for the disease-mechanistic inference. Human antibody RCTs clear functional therapeutic thresholds for the tested intervention; they are counterevidence, not positive threshold crossings for protective SC6. The human protective leg remains Β under the association rule.", "note": "Convergent lines are assessed as a set; one weak leg is not re-capped over the assembled case." } ], "boundary_check_BGD": [ { "subclaim_id": "SC1", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Purified peptide binding, membrane disruption and curli assays alone do not establish endogenous CNS defence.", "Overexpression survival can be a genuine result inside that model while the inference to native peptide necessity remains capped.", "Plaque or Aβ biomarker movement without functional disease trajectory does not cross Δ.", "APP loss is not Aβ-selective loss: receptor, trophic and processing functions must be separated." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Sequence controls, immunodepletion, binding and structural assays support a real peptide-associated interaction. These experiments remain concentrated or engineered assays; the native CNS mechanism is not established.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC2", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Purified peptide binding, membrane disruption and curli assays alone do not establish endogenous CNS defence.", "Overexpression survival can be a genuine result inside that model while the inference to native peptide necessity remains capped.", "Plaque or Aβ biomarker movement without functional disease trajectory does not cross Δ.", "APP loss is not Aβ-selective loss: receptor, trophic and processing functions must be separated." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Salmonella and one HSV study show survival advantages with 5XFAD expression, whereas two HSV approaches and roseolovirus challenge limit generalization. Constitutive transgenes and APP changes do not isolate native peptide causality.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC3", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Purified peptide binding, membrane disruption and curli assays alone do not establish endogenous CNS defence.", "Overexpression survival can be a genuine result inside that model while the inference to native peptide necessity remains capped.", "Plaque or Aβ biomarker movement without functional disease trajectory does not cross Δ.", "APP loss is not Aβ-selective loss: receptor, trophic and processing functions must be separated." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Transformed-cell media show low-nanomolar or reported CSF-range activity, stronger than synthetic MIC alone. No selective wild-type in vivo loss with native-dose rescue establishes the corresponding physiological CNS function.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC4", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Purified peptide binding, membrane disruption and curli assays alone do not establish endogenous CNS defence.", "Overexpression survival can be a genuine result inside that model while the inference to native peptide necessity remains capped.", "Plaque or Aβ biomarker movement without functional disease trajectory does not cross Δ.", "APP loss is not Aβ-selective loss: receptor, trophic and processing functions must be separated." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "APP-null Salmonella mortality is nonsignificant and APP-null Zika mortality reflects a decoy-receptor function. APP-fragment activity and synaptic Aβ rescue cannot be transferred to Aβ-specific infection necessity.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC5", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Purified peptide binding, membrane disruption and curli assays alone do not establish endogenous CNS defence.", "Overexpression survival can be a genuine result inside that model while the inference to native peptide necessity remains capped.", "Plaque or Aβ biomarker movement without functional disease trajectory does not cross Δ.", "APP loss is not Aβ-selective loss: receptor, trophic and processing functions must be separated." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Some infection experiments increase amyloid, while HSV, roseolovirus and BALB/c replication studies are null and Toxoplasma promotes clearance. Biomarker deposition alone does not establish disease-relevant protective dependency.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC6", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Purified peptide binding, membrane disruption and curli assays alone do not establish endogenous CNS defence.", "Overexpression survival can be a genuine result inside that model while the inference to native peptide necessity remains capped.", "Plaque or Aβ biomarker movement without functional disease trajectory does not cross Δ.", "APP loss is not Aβ-selective loss: receptor, trophic and processing functions must be separated." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Human pathogen/DNA colocalization and culture observations provide association, with null detections and processing effects. No examined human study establishes that plaque entrapment improves clinical or tissue outcomes; anti-amyloid clinical benefit challenges uniformly net-protective deposition.", "ceiling_from_boundary_check": "Γ" } ], "thresholds_tested": [ { "subclaim_id": "SC1", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Binding-defective versus binding-intact Aβ matched for aggregation and membrane interaction, with endogenous host infection outcomes." }, { "subclaim_id": "SC2", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Inducible Aβ-selective host manipulation with native-level rescue, survival and pathogen load across predefined strains/routes." }, { "subclaim_id": "SC3", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Wild-type extracellular dose measurement and peptide-selective loss/rescue under infection, preserving APP receptor and synaptic functions." }, { "subclaim_id": "SC4", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Aβ-specific conditional loss with physiologic rescue that restores infection survival without restoring unrelated APP functions." }, { "subclaim_id": "SC5", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Infection/sham plus pathogen clearance and Aβ-specific perturbation that links deposition to meaningful host outcome rather than staining alone." }, { "subclaim_id": "SC6", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Contamination-controlled, prospective human pathogen ascertainment and spatial validation combined with infection-stratified plaque modulation and tissue/clinical outcomes." } ], "generalization_check": { "generalization_tested": "yes", "context_boundary_mapped": "yes", "internal_negative_controls": [ "Soscia reverse/scrambled sequence and IgG immunodepletion controls (PMID20209079).", "Kumar physiological-range media versus much higher synthetic fungicidal MIC; APP-KO survival P=0.10 (PMID27225182).", "Bocharova female-only dose/age nulls and anti-gB uninfected cross-reactivity with gD/H controls (PMID34052228).", "C.pneumoniae staining also occurs in untouched/mock animals in replication (PMID17581756).", "Curli-null bacteria show no Aβ biofilm dispersion, and total bacterial density is not significantly decreased (PMID38438446).", "Human C.pneumoniae, HHV6 and processing-cohort nulls constrain simple localization (PMID10878049,31983538,32310171)." ], "note": "Pathogen, strain, inoculum, sex, age, route and peptide state explain mapped exceptions without inventing responder-defined scope. Human net protection remains untested in the examined evidence; lack of a native rescue is a search-bounded gap, not a claim that no such study could exist." }, "falsification_patterns_met": [ { "pattern": "Expression does not consistently protect against infection", "evidence": "HSV dose/sex/age study and intranasal APP/PS1 infection are negative; MRV does not increase plaques (PMID34052228,38143354,35033173).", "downgrade_applied": false }, { "pattern": "Plaque colocalization can reflect assay artifact or lack pathogen specificity", "evidence": "Uninfected anti-gB cross-reactivity and absent anti-gD/H plaque signals; human sequencing specificity challenge and null detection (PMID34052228,32336252,31983538).", "downgrade_applied": false }, { "pattern": "Removing amyloid can improve human clinical trajectory", "evidence": "Donanemab and lecanemab reduce decline with harms (PMID37459141,36449413); this challenges blanket protective deposition without proving every plaque harmful.", "downgrade_applied": false } ], "pitfalls_flagged": [ { "pitfall": "Applied peptide activity treated as evolved physiological necessity", "where": "µg/ml or µM assays are separated from low-dose conditioned medium and native in vivo rescue." }, { "pitfall": "APP loss attributed exclusively to Aβ", "where": "Zika decoy receptor and non-Aβ APP fragments are scored as alternatives." }, { "pitfall": "DNA or antigen presence treated as viable protective entrapment", "where": "Human colocalization and culture are separated from plaque functional outcomes." }, { "pitfall": "Biofilm redistribution treated as microbial killing", "where": "Prosswimmer total density is not significantly reduced; curli-dependent oligomer decrease is P=0.07." }, { "pitfall": "Clinical nulls or harms treated as proof of AMP loss", "where": "BACE pleiotropy, target species, clearance and disease stage remain explicit." }, { "pitfall": "Provider full-text claim treated as source access", "where": "Only Soscia/Kumar/Bocharova returned original aspects are compared; missing originals and correction remain unavailable." } ], "causal_tally_audit": { "tally_claimed_by_document": 8, "tally_after_audit": 8, "items_rejected": [ "Null and negative contrasts are discriminators, not positive threshold crossings. Reports and replications are not independent causal lines.", "Eight especially discriminating experimental contrasts are flagged, including negative tests and two clinical countertests. Zero qualifies as positive human net-protective-plaque perturbation.", "Engineered infection survival, host APP loss, immune-cell ablation and clinical antibodies test distinct targets; their tally is not eight independent confirmations of antimicrobial amyloid." ] }, "steelman": { "case_one_rung_higher": "One rung above Β is Γ: the low-dose conditioned medium, immunodepletion, transgenic survival and spatial human findings jointly make a plausible functional protective model, stronger than a bare association.", "case_one_rung_lower": "One rung below Β is Α: human localization may reflect antibody/sequence artifact, late barrier failure or opportunistic microbes, leaving protective plaque function mostly conceptual.", "which_rejected": "Γ is appropriate to SC1–5 but rejected for the full weakest-link conjunction because human SC6 has no temporally or perturbationally demonstrated positive protective outcome. Α understates reproducible specific assay activity and substantive human localization reports. The original positive and negative functional data remain separate from grade.", "blocking_cap_threshold_or_missing_experiment": "Missing experiment: Use adult wild-type mice with inducible Aβ-selective production/neutralization preserving APP ectodomain functions, crossed with CNS infection and matched sterile inflammation; restore the measured native peptide dose using aggregation- and binding-matched variants. Pair with prospectively ascertained pathogen-positive human tissue/outcome cohorts." }, "final_score": { "hsef_level": "Β", "hsef_descriptor": "Associational", "confidence": "Moderate", "confidence_rationale": "Evidence density and reproducibility set the band: 61 primary reports, but the decisive experiments conflict (one HSV survival benefit against two null HSV approaches and a null roseolovirus challenge), the human detection literature splits between positive series and null or contamination-bounded ones, and no result has been reproduced in the Abeta-selective form the claim needs. Access depth is reported separately and is not a determinant of confidence (rationale corrected 2026-10-14 in adversarial review; band unchanged).", "rests_on_non_peer_reviewed_work": false, "rationale": "The preregistered weakest-link rule yields Β from SC6. Direct human support for net protective pathogen-centered plaques is localization and ex vivo activity, without functional necessity, temporal demonstration or infection-stratified benefit. SC1–5 have mechanistic or simplified-model support (Γ); neither APP receptor immunity nor clinical antibody efficacy proves the nominal protective mechanism. This grade does not deny in vitro activity or refute all pathogen contributions." }, "role_of_mechanism": { "classification": "downstream consequence", "derivation_step_matched": 1, "derivation": "For the registered infection-response mechanism, deposition follows microbial challenge in the positive models and can resolve with pathogen burden. This identifies a downstream response within those systems, not the primary infection initiator or a proved protective human function. Aβ can separately amplify sterile injury and support normal synapses; no role is assigned from tournament rank.", "tournament_used_as_tiebreaker": false, "note": "Derived from causal direction, not tournament rank." }, "extended_scoring_MSD": { "momentum": { "value": "Mechanistic only", "artifact": "Prosswimmer2024 curli assays, Kumar2025 amylin synergy and 2026 retina pathogen/inflammasome work extend mechanism and localization. None supplies the missing Aβ-selective native infection rescue plus human plaque outcome.", "justification": "Prosswimmer2024 curli assays, Kumar2025 amylin synergy and 2026 retina pathogen/inflammasome work extend mechanism and localization. None supplies the missing Aβ-selective native infection rescue plus human plaque outcome." }, "stability": { "value": "Stable", "trigger": "No named pending result is verified that would imminently cross human protective SC6; ongoing mechanistic publication is not a directional score trigger.", "justification": "No named pending result is verified that would imminently cross human protective SC6; ongoing mechanistic publication is not a directional score trigger." }, "divergence": { "implied_level": null, "implied_level_basis": "No single field-implied level is defensible from conflicting framings.", "assessed_level": "Β", "gap_in_rungs": null, "value": "Contested", "justification": "No manufactured field consensus or arithmetic gap." }, "calibration_note": "M/S/D never modify HSEF level or confidence." }, "change_record": { "applies": false, "prior_level": "Ranking categorical verdict visible; no prior letter used as a target", "prior_confidence": null, "prior_source": null, "derived_before_consulting_prior": false, "new_level": "Β", "direction": "newly assigned", "what_moved_it": "Fresh primary evidence appraisal; not blinded.", "divergence_from_other_reviewers": null }, "proposed_decisive_experiments": [ { "name": "Registered boundary experiment", "experiment": "Use adult wild-type mice with inducible Aβ-selective production/neutralization preserving APP ectodomain functions, crossed with CNS infection and matched sterile inflammation; restore the measured native peptide dose using aggregation- and binding-matched variants. Pair with prospectively ascertained pathogen-positive human tissue/outcome cohorts.", "readout": "Pathogen viable load, survival, synaptic injury and cognition alongside free/aggregate Aβ concentrations and spatial localization", "critical_control": "APP receptor competence, noninfected and sterile-injury cohorts, sequence/aggregate controls, uninfected staining controls, extraction blanks and prespecified strain/sex/age", "supporting_result": "Selective loss worsens infection outcome and native-dose binding-intact rescue restores protection without increased neural injury; human pathogen-trapping predicts better tissue outcomes", "falsifying_result": "Loss has no infection consequence, rescue works through non-Aβ APP or generic aggregation, or deposits track injury without net outcome benefit" } ], "knowledge_gaps": [ { "name": "Gap 1", "statement": "Selective adult Aβ loss with native-dose infection rescue preserving other APP functions.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 2", "statement": "Measured free and aggregate Aβ exposure in living infected wild-type CNS, not only CSF comparison to transformed medium.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 3", "statement": "Mechanistic reconciliation of HSV strains/routes, anti-gB cross-reactivity and positive versus negative survival studies.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 4", "statement": "Contamination-controlled viable pathogen localization inside human plaques with host injury and longitudinal outcomes.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 5", "statement": "Infection-stratified anti-amyloid intervention and immune safety; current RCT abstracts do not supply this test.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 6", "statement": "Direct membrane killing versus adhesion inhibition, microbial dispersion and antibiotic synergy under native ionic conditions.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 7", "statement": "Pathogen-specific deposition versus recruited immune clearance and sterile inflammatory induction.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 8", "statement": "Full correction-body audit for Eimer and lecanemab phase2, plus supplements and inaccessible trial/colocalization originals.", "relevance": "Limits mechanism identification or scope." } ], "review_metadata": { "review_date": "2026-10-08", "reviewer": "Codex", "evidence_base_note": "61 primary reports; literature cutoff 2026-10-08; source examination UTC date 2026-10-09; bounded critical review, not exhaustive systematic review.", "literature_tools_available": true, "literature_tools_note": "Life Sciences Literature PubMed/Entrez; attempted Europe PMC XML and successful public NCBI PMC direct HTTPS access are separately logged. Signed-in Consensus browser discovery and targeted indexed full-text checks are reconciled with original sections; failed matches and source substitutions remain explicit. Zero Consensus API calls. SciSpace discovery was also used; primary leads were resolved to canonical originals before counting. See scispace-discovery.json.", "skill_version": "5.3", "validator_run": "exact archived v5.3 validator 2.3; see validator.txt", "validator_warnings_addressed": "The index entry was restated as the preregistered causal claim. No real phenomenon is labelled refuted; warning is explicitly justified.", "consensus_consistency_audit": "2026-10-09; supplementary provenance/source reconciliation; original grading retained; prior grades visible." }, "is_calibration_entry": { "value": false, "entry_role": "not_calibration", "blind_graded": null, "completed_blinded_calibration": false, "expected_band_sealed_at": "", "target_sha256": "", "target_authorship": "not applicable", "target_author_saw_review": null, "future_run_status": "not prepared", "unblinded_reason": "Ranking categorical verdict and index guidance were visible. No completed blinded calibration claimed." }, "upper_ladder_check": { "final_level_below_zeta": true, "equivalents_considered": [ { "kind": "mendelian_randomization", "available": false, "why_not_sufficient": "Human clinical antibody trials, cell-source suppression and infection/pathway genetic experiments were considered. They can establish harmful or therapeutic contributions, but no set covers native Aβ-specific loss/rescue plus protective human plaque function. Independence is assessed for the same proposition; convergence on other mechanisms cannot carry this conjunction upward." }, { "kind": "natural_experiment", "available": false, "why_not_sufficient": "Human clinical antibody trials, cell-source suppression and infection/pathway genetic experiments were considered. They can establish harmful or therapeutic contributions, but no set covers native Aβ-specific loss/rescue plus protective human plaque function. Independence is assessed for the same proposition; convergence on other mechanisms cannot carry this conjunction upward." }, { "kind": "dose_response_across_populations", "available": false, "why_not_sufficient": "Human clinical antibody trials, cell-source suppression and infection/pathway genetic experiments were considered. They can establish harmful or therapeutic contributions, but no set covers native Aβ-specific loss/rescue plus protective human plaque function. Independence is assessed for the same proposition; convergence on other mechanisms cannot carry this conjunction upward." }, { "kind": "withdrawal_rechallenge", "available": false, "why_not_sufficient": "Human clinical antibody trials, cell-source suppression and infection/pathway genetic experiments were considered. They can establish harmful or therapeutic contributions, but no set covers native Aβ-specific loss/rescue plus protective human plaque function. Independence is assessed for the same proposition; convergence on other mechanisms cannot carry this conjunction upward." }, { "kind": "therapeutic_perturbation_hard_endpoint", "available": false, "why_not_sufficient": "Human clinical antibody trials, cell-source suppression and infection/pathway genetic experiments were considered. They can establish harmful or therapeutic contributions, but no set covers native Aβ-specific loss/rescue plus protective human plaque function. Independence is assessed for the same proposition; convergence on other mechanisms cannot carry this conjunction upward." } ], "convergence_present": true, "cap_reapplied_to_convergent_set": false }, "provenance_header": { "sources_total": 61, "claims_total": 68, "claims_verified": 68, "claims_unverified": 0, "claims_contradicted": 0, "tier_a_sources": 61, "generated_by": "Codex; HSEF v5.3", "gate_passed": true }, "claims": [ { "id": "C1", "text": "Synthetic Aβ inhibits multiple microbes; homogenate activity correlates with Aβ and falls after immunodepletion. Disrupted postmortem homogenate is not native extracellular concentration, living CNS defence or net protective plaques.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3", "SC6" ], "source_ns": [ 1 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. Selected body sections: 3:Materials and Methods:paragraph5, 3:Materials and Methods:paragraph10, 3:Materials and Methods:paragraph12, 1:Results. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C2", "text": "5XFAD resists Salmonella; transformed-cell conditioned medium at reported CSF-range 2–20 ng/ml inhibits adhesion and agglutinates Candida, reduced by Aβ immunodepletion. APP-null mortality is only a trend (P=0.10), with no native-dose rescue in examined Results. Engineered secretion, inoculation and APP pleiotropy do not establish adult CNS Aβ necessity.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2", "SC4", "SC5" ], "source_ns": [ 2 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph1, 1:Results:paragraph6, 1:Results:paragraph7, 1:Results:paragraph9, 1:Results:paragraph10, 1:Results:paragraph16. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C3", "text": "Herpesvirus glycoprotein binding accelerates deposition and protective entrapment in model systems. Female 5XFAD overexpression and engineered cultures constrain inference. Examined PMC Methods contain conflicting injection units; correction PMID30571943 metadata is verified but body unavailable, so exact inoculum is not asserted. HSV protection is contradicted elsewhere.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2", "SC5" ], "source_ns": [ 3 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. Selected body sections: 1:RESULTS:paragraph1, 1:RESULTS:paragraph2, 1:RESULTS:paragraph7, 1:RESULTS:paragraph8, 6:METHOD DETAILS:paragraph0, 6:METHOD DETAILS:paragraph1, 6:METHOD DETAILS:paragraph4, 6:METHOD DETAILS:paragraph6. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C4", "text": "Aβ inhibits HSV entry with pre- or co-treatment but not later dosing; adenovirus is not inhibited. Applied peptides and timing constrain generalization; no endogenous infection-rescue test or plaque outcome.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3" ], "source_ns": [ 4 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C5", "text": "HSV-induced conditioned medium confers Aβ-dependent protection against secondary replication. Transformed cell secretion and conditioned-medium transfer cannot establish wild-type CNS necessity or physiological brain concentration.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3" ], "source_ns": [ 5 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C6", "text": "Soluble Aβ42 attenuates HSV-associated miR146a and infection readouts. Applied peptide response does not identify native dose, unique sequestration mechanism or protective plaques.", "carries_number": true, "load_bearing_for": [ "SC1", "SC3" ], "source_ns": [ 6 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C7", "text": "Cationic peptides from an APP heparin-binding region kill microbes and disrupt membranes. These APP-derived fragments are not Aβ; APP antimicrobial function cannot automatically be credited to Aβ.", "carries_number": false, "load_bearing_for": [ "SC1", "SC4" ], "source_ns": [ 7 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C8", "text": "Applied Aβ42 inhibits EV-A71 early entry with capsid/receptor binding and agglutination. Culture doses and receptor effects do not establish native mammalian CNS protection; contrast with adenovirus shows pathogen specificity.", "carries_number": true, "load_bearing_for": [ "SC1", "SC3" ], "source_ns": [ 8 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C9", "text": "Aβ remodels bacterial amyloids and impairs adhesion; tail-injected fibrils colocalize with Aβ in fish. Injected peripheral fibrils are distinct from CNS plaques; remodeled FapC remains toxic to SH-SY5Y cells.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3", "SC5" ], "source_ns": [ 9 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C10", "text": "At 7.5 µM, Aβ oligomers shift bacteria from biofilm to planktonic phase without significant total-density loss and increase gentamicin susceptibility; curli-null control lacks these effects. The neuronal oligomer reduction with curli deletion is nonsignificant (P=0.07). Redistribution is not direct killing; applied micromolar peptide and antibiotic synergy do not establish native CNS necessity.", "carries_number": true, "load_bearing_for": [ "SC1", "SC3", "SC5" ], "source_ns": [ 10 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. Selected body sections: 4:Materials and methods:paragraph3, 4:Materials and methods:paragraph5, 4:Materials and methods:paragraph7, 1:Results. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C11", "text": "Amylin and Aβ interact synergistically against bacteria including in 3D neural cultures. Amylin is the main tested effector; no endogenous mammalian CNS Aβ loss/rescue or human plaque outcome.", "carries_number": true, "load_bearing_for": [ "SC1", "SC3" ], "source_ns": [ 11 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C12", "text": "APP loss or blockade increases Zika replication and neonatal mouse mortality; APP acts as a decoy receptor. APP extracellular receptor function is distinct from cleaved Aβ antimicrobial activity; neonatal Zika cannot establish Aβ necessity in adult AD.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 12 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. Selected body sections: Scite linear original body offset0 length8000: Introduction and first Results, truncated at next paragraph. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C13", "text": "5XFAD fails to protect against HSV; abundant plaques lack viral particles, and aged survival differences are nonsignificant. Anti-gB T111 cross-reacts with plaques in uninfected controls; anti-gD/H do not show viral entrapment. Model and acute route constrain scope, but sex-only and dose/age analyses also fail significant survival protection.", "carries_number": true, "load_bearing_for": [ "SC2", "SC5" ], "source_ns": [ 13 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Results:paragraph0, 0:Results:paragraph2, 0:Results:paragraph13, 0:Results:paragraph14, 0:Results:paragraph15, 0:Results:paragraph16, 0:Results:paragraph18, 0:Results:paragraph20, 0:Results:paragraph23. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C14", "text": "HSV infection does not increase plaque number or volume, with similar disease and survival across genotypes. One strain route and baseline model do not refute all infection-triggered amyloidosis; negative result constrains generality.", "carries_number": false, "load_bearing_for": [ "SC2", "SC5" ], "source_ns": [ 14 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C15", "text": "Pseudomonas effectors shift host amyloids from antimicrobial to cytotoxic activity. Peripheral endothelial amyloids include Aβ and tau; no CNS Aβ-specific necessity or uniformly protective response.", "carries_number": false, "load_bearing_for": [ "SC1", "SC5" ], "source_ns": [ 15 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C16", "text": "Aβ-positive tissues contain more bacterial sequence relative abundance alongside barrier permeability changes. Low-biomass contamination and barrier failure can explain association; sequence presence does not show viable entrapment or survival benefit.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 16 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C17", "text": "AMP expression and Aβ42 covary with age differently in AD flies. AMP transcription is not Aβ antimicrobial function; correlations do not identify infection initiation or protection.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 17 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C18", "text": "Gingipains associate with AD pathology; infection induces Aβ and inhibition reduces bacterial load, inflammation and neuronal injury. Human association is postmortem; lowering Aβ after pathogen treatment does not establish Aβ entrapment as protective or necessary.", "carries_number": false, "load_bearing_for": [ "SC5", "SC6" ], "source_ns": [ 18 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C19", "text": "Repeated thermal reactivation produces Aβ, tau changes and progressive cognitive deficits. Stress, inflammation and direct viral injury remain alternatives; no Aβ-specific perturbation separates mediator from response.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 19 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C20", "text": "Infection disrupts autophagy and UPR with increased Aβ and tau phosphorylation. Stress pathways offer an indirect deposition mechanism; no native host survival or plaque benefit test.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 20 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C21", "text": "Infection worsens learning and neuronal necrosis in transgenic mice without altered Aβ concentrations. Acute inoculation plus ceftriaxone is distinct from chronic human infection; deposition is not an obligatory accompaniment.", "carries_number": false, "load_bearing_for": [ "SC2", "SC5" ], "source_ns": [ 21 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C22", "text": "Chlamydial antigens occur near AD pathology but Thioflavin overlays show no direct plaque colocalization. Small sample and antibody specificity limits; regional proximity is not entrapment or protective action.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 22 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C23", "text": "Culturable PCR-confirmed C. pneumoniae isolates were obtained from two AD brains. Small selected samples and earlier laboratory series do not establish population frequency, timing or plaque protective function.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 23 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C24", "text": "C. pneumoniae load is higher in APOE4-bearing AD tissue. Cross-sectional genotype association cannot distinguish impaired clearance, susceptibility or protective amyloid function.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 24 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C25", "text": "C. pneumoniae infection precedes increased Aβ42-immunoreactive deposits, some Thioflavin-positive. Biomarker deposition is distinct from AD neurodegeneration and antimicrobial benefit; strain and histology specificity matter.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 25 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C26", "text": "Multiple assays detect viable transcriptionally active C. pneumoniae in a small AD series versus controls. Other laboratories report null detections; no prospective chronology or plaque-specific benefit measurement.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 26 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C27", "text": "C. pneumoniae associates with Aβ42 and inflammation; infection worsens cognition in a model. Disease-amplifying association and model effect do not identify protective Aβ; linked update records are not independent reports.", "carries_number": true, "load_bearing_for": [ "SC5", "SC6" ], "source_ns": [ 27 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C28", "text": "Infection reduces plaque burden through recruited monocytes; monocyte ablation increases Aβ. Immune clearance can oppose deposition, showing pathogen specificity; plaque reduction alone does not measure net cognitive protection.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 28 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C29", "text": "Toxoplasma infection reduces plaques and recruits activated myeloid cells and T cells. Shares infection/5XFAD paradigm with earlier work; lineage tracing is not Aβ-specific necessity or human causation.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 29 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C30", "text": "HSV DNA is found in both AD and normal brains with controls for amplification. Latent DNA presence does not distinguish active infection, etiologic timing or protective plaques.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 30 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C31", "text": "HSV DNA is plaque-associated in AD and aged normal tissue, with greater plaque association in AD. DNA localization does not measure viable trapped viruses, temporal initiation or protective tissue outcomes; aged normals also show plaque-associated DNA.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 31 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C32", "text": "HSV is detected in a small minority of brains, and most Aβ-positive brains lack detected HSV. Regional sampling and low burden affect sensitivity; presence or absence alone does not test Aβ antimicrobial function.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 32 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C33", "text": "HHV6 lacks AD specificity across multiple brain repositories and assays. Negative detection constrains common pathogen association; cannot exclude other pathogens, remote cleared infection or restricted subgroups.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 33 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C34", "text": "Aβ-virus interaction inhibits infection in vitro but infection does not increase plaques; human roseoloviruses are not overrepresented. In vitro binding need not produce endogenous deposition; murine virus is an analogue and cohort sequencing shares assay limits.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2", "SC5", "SC6" ], "source_ns": [ 34 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C35", "text": "Alternative sequence analysis finds very few HHV6A reads and no HHV7, identifying specificity problems. Same underlying data as Readhead; a methodological challenge rather than an independent biological cohort.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 35 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C36", "text": "Original pipeline reports increased HHV6A/7 and networks involving APP metabolism in AD. Postmortem networks do not establish infection timing; specificity is directly challenged by reanalysis and subsequent detection studies.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 36 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C37", "text": "Partial HHV6 integration signals are more prevalent in synucleinopathy cohorts rather than broadly across dementias. Integrated segments do not establish active AD infection or plaque entrapment; cohort and ancestry effects remain possible.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 37 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C38", "text": "HSV-positive APOE4 carriers show an AD association in a small case-control series. Large odds ratio with wide interval is not a plaque protection measurement, prospective cause or population necessity.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 38 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C39", "text": "Live organisms traverse olfactory/trigeminal paths and Aβ accumulates near inclusions. Adjacency after experimental exposure is not entrapment-mediated protection or spontaneous human AD.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 39 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C40", "text": "Extracellular Aβ immunoreactivity also occurs in mock and untouched animals and differs from transgenic plaques. Assay and strain differences require reconciliation; these data do not unequivocally support infection-induced AD-like plaques.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 40 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C41", "text": "Transient Aβ deposits follow predominantly olfactory infection and resolve as antigen burden falls. Small cultures and strain dependence constrain inference; no demonstrated Aβ necessity or sustained AD phenotype.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 41 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C42", "text": "Neither C. pneumoniae DNA nor antigens are detected in an independent AD series. Paraffin material and sensitivity may limit detection; contradicts common presence without proving universal absence.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 42 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C43", "text": "Repeated nested PCR and culture fail to unequivocally detect C. pneumoniae in AD or controls. Stored-tissue sampling and organism burden constrain negative inference; no direct plaque functional experiment.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 43 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C44", "text": "Oral Treponema DNA and antigens are more frequent in small AD samples than controls. Postmortem presence with possible nerve route does not establish disease initiation, viable plaque trapping or host protection.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 44 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C45", "text": "Bacterial sequence patterns vary strongly with cohort, extraction, region and postmortem interval; AD differences are limited. Low biomass and processing biases can generate apparent brain microbial signals; no viable organism or plaque function proof.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 45 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C46", "text": "Donanemab clears plaque and slows decline at 76 weeks with ARIA and treatment-related deaths. Net benefit is bounded to enrolled early AD; immune effects and no infection stratification prevent inferring every plaque is harmful or AMP function absent.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 46 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C47", "text": "Lecanemab lowers amyloid and yields less cognitive/functional decline with infusion reactions and ARIA. Targets soluble protofibrils as well as aggregates; clinical improvement is modest, not prevention or proof against pathogen-specific protection.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 47 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C48", "text": "Phase2 donanemab improves primary iADRS but most secondary outcomes lack substantial differences. Small early trial and ARIA limit generalization; plaque reduction does not uniquely identify a microbial mechanism.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 48 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C49", "text": "Phase2 lecanemab misses its 12-month primary probability threshold despite positive 18-month measures. Primary versus later secondary outcomes must remain distinct; correction metadata noted and full correction not audited.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 49 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C50", "text": "Aducanumab meets EMERGE primary endpoint but not ENGAGE despite target engagement in both. Futility halt and discordant efficacy prevent counting two convergent successful causal lines; no infectious subgroup test.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 50 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C51", "text": "Gantenerumab lowers plaques without significant slowing in either GRADUATE trial; ARIA occurs. Incomplete clearance and antibody-specific effects constrain interpretation; null benefit does not prove plaques protective against infection.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 51 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C52", "text": "Solanezumab fails to slow decline in amyloid-positive cognitively unimpaired participants over 240 weeks. Monomer-targeting differs from plaque clearance; no infection stratification or necessity test.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 52 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C53", "text": "Verubecestat fails to reduce cognitive or functional decline and increases adverse events. BACE1 has other substrates and broad processing functions; drug harms cannot be assigned specifically to loss of Aβ antimicrobial defence.", "carries_number": false, "load_bearing_for": [ "SC3", "SC6" ], "source_ns": [ 53 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C54", "text": "EXPEDITION3 fails its solanezumab primary endpoint; secondary results are descriptive after hierarchy failure. Target species and exposure differ from successful antibodies; no infectious-protection mechanism measurement.", "carries_number": true, "load_bearing_for": [ "SC6" ], "source_ns": [ 54 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C55", "text": "Several cognitive measures worsen with two BACE inhibitors while verbal fluency improves. Secondary endpoints and enzyme pleiotropy restrict causation; physiological Aβ functions need not be antimicrobial.", "carries_number": false, "load_bearing_for": [ "SC3", "SC6" ], "source_ns": [ 55 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C56", "text": "Endogenous Aβ participates in memory and picomolar applied Aβ enhances consolidation. Supports a non-antimicrobial physiological alternative; no microbial challenge or plaque protective function.", "carries_number": false, "load_bearing_for": [ "SC3" ], "source_ns": [ 56 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C57", "text": "Aβ rescues homeostatic synaptic strengthening in APP-null tissue whereas sAPPα does not. A native peptide rescue exists for synaptic plasticity, distinct from infection rescue; ex vivo culture does not settle adult CNS immunity.", "carries_number": false, "load_bearing_for": [ "SC3", "SC4" ], "source_ns": [ 57 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C58", "text": "Free Aβ can be synaptogenic while aggregation shifts it toward synaptotoxicity; scrambled/inverted controls are inactive. Chemically controlled culture is distinct from native pathogen defence; aggregation-state duality argues against assuming all deposition protective.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3", "SC6" ], "source_ns": [ 58 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C59", "text": "Suppressing oligodendrocyte Aβ improves neuronal function and pathology in vivo. Secretase/cell-source perturbation is not an infection-stratified human plaque experiment; supports bounded harmful contribution.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 59 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C60", "text": "Inflammasome loss protects memory and enhances Aβ clearance in mice; human caspase activation is observed. Germline immune-pathway effects do not isolate plaque toxicity or require infection; sterile amplification remains a credible alternative.", "carries_number": false, "load_bearing_for": [ "SC5", "SC6" ], "source_ns": [ 60 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "C61", "text": "Dectin1 loss reduces Aβ-triggered inflammation and functional deficits through Syk/NFκB. Infused peptide is a forced model; receptor-dependent sterile injury differs from endogenous AD initiation and antimicrobial defence.", "carries_number": true, "load_bearing_for": [ "SC5", "SC6" ], "source_ns": [ 61 ], "verification": "verified", "verified_against": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-09", "note": "" }, { "id": "CSC1", "text": "Sequence controls, immunodepletion, binding and structural assays support a real peptide-associated interaction. These experiments remain concentrated or engineered assays; the native CNS mechanism is not established.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 34, 58 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-09", "note": "" }, { "id": "CSC2", "text": "Salmonella and one HSV study show survival advantages with 5XFAD expression, whereas two HSV approaches and roseolovirus challenge limit generalization. Constitutive transgenes and APP changes do not isolate native peptide causality.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 2, 3, 13, 14, 21, 34 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-09", "note": "" }, { "id": "CSC3", "text": "Transformed-cell media show low-nanomolar or reported CSF-range activity, stronger than synthetic MIC alone. No selective wild-type in vivo loss with native-dose rescue establishes the corresponding physiological CNS function.", "carries_number": false, "load_bearing_for": [ "SC3" ], "source_ns": [ 1, 4, 5, 6, 8, 9, 10, 11, 53, 55, 56, 57, 58 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-09", "note": "" }, { "id": "CSC4", "text": "APP-null Salmonella mortality is nonsignificant and APP-null Zika mortality reflects a decoy-receptor function. APP-fragment activity and synaptic Aβ rescue cannot be transferred to Aβ-specific infection necessity.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 2, 7, 12, 57 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-09", "note": "" }, { "id": "CSC5", "text": "Some infection experiments increase amyloid, while HSV, roseolovirus and BALB/c replication studies are null and Toxoplasma promotes clearance. Biomarker deposition alone does not establish disease-relevant protective dependency.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 2, 3, 9, 10, 13, 14, 15, 16, 17, 18, 19, 20, 21, 25, 27, 28, 29, 34, 39, 40, 41, 60, 61 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-09", "note": "" }, { "id": "CSC6", "text": "Human pathogen/DNA colocalization and culture observations provide association, with null detections and processing effects. No examined human study establishes that plaque entrapment improves clinical or tissue outcomes; anti-amyloid clinical benefit challenges uniformly net-protective deposition.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 1, 18, 22, 23, 24, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37, 38, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 58, 59, 60, 61 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-09", "note": "" }, { "id": "CH", "text": "Aβ antimicrobial activity is demonstrable in assays and some engineered infection models; net protective human Alzheimer plaques remain an association-level proposition.", "carries_number": false, "load_bearing_for": [ "SC6" ], "source_ns": [ 1, 2, 13, 31, 46, 47 ], "verification": "verified", "verified_against": "Bounded synthesis of examined sources; score is adjudication.", "verified_on": "2026-10-09", "note": "" } ], "citation_ledger": [ { "n": 1, "citation": "Soscia SJ, Kirby JE, Washicosky KJ et al. 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Neurobiology of aging. 2004.", "tier": "A", "kind": "primary", "pmid": "15013562", "doi": "10.1016/S0197-4580(03)00127-1", "url": "https://pubmed.ncbi.nlm.nih.gov/15013562/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID15013562", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "carries_claims": [ "C25", "CSC5" ] }, { "n": 26, "citation": "Balin BJ, Gérard HC, Arking EJ et al. Identification and localization of Chlamydia pneumoniae in the Alzheimer's brain. 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Journal of medical virology. 1991.", "tier": "A", "kind": "primary", "pmid": "1649907", "doi": "10.1002/jmv.1890330403", "url": "https://pubmed.ncbi.nlm.nih.gov/1649907/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-09", "status_checked_on": "2026-10-09", "study_id": "PMID1649907", "access_depth": "abstract_metadata", "access_note": "Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed.", "carries_claims": [ "C30", "CSC6" ] }, { "n": 31, "citation": "Wozniak MA, Mee AP, Itzhaki RF. Herpes simplex virus type 1 DNA is located within Alzheimer's disease amyloid plaques. 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No complete-paper or supplement audit claimed.", "carries_claims": [ "C61", "CSC5", "CSC6" ] } ], "independence_basis": { "required": false, "lines": [ { "label": "Peptide-sequence and immunodepletion assays", "sources": [ 1, 2 ], "excludes_error": "Reduce generic peptide/medium explanations but retain concentration, aggregate and antibody specificity errors." }, { "label": "Controlled acute infection expression contrasts", "sources": [ 3, 13, 14 ], "excludes_error": "Test survival and deposition with relevant negative results; share engineered APP biology rather than establish independent native necessity." }, { "label": "Human clinical amyloid manipulation", "sources": [ 46, 47 ], "excludes_error": "Provides functional counterevidence with different experimental error from postmortem spatial assays; antibody immune actions and target species still differ." } ], "shared_failure_mode_checked": true, "note": "No Ζ claim for the registered conjunction. H4/CHO and 5XFAD results share platform vulnerabilities; Readhead reanalysis shares data; Chlamydia preprint updates and laboratory series are not new independent lines. Human trials and postmortem methods fail differently, but clinical benefit points away from blanket protective deposition." }, "consensus_validation": { "completed": true, "status": "documented_historical_discovery_and_reconciliation", "provider": "Consensus", "provider_mode": "Historical browser/connector use as recorded in the source artifacts", "local_audit_date": "2026-10-09", "primary_comparison_count": null, "reported_usage": [ { "path": "D:\\HypothesisCritic\\deliverables\\hsef_v53_popularity_ranks_41_45_2026-10-08\\antimicrobial-amyloid\\consensus\\usage.json", "metrics": { "deep_queries": 0, "api_calls": 0, "browser_pro_queries": 2, "targeted_studies_requested": 8, "original_passage_comparisons": 3 } } ], "grade_changed": false, "score_before": { "hsef_level": "Β", "hsef_descriptor": "Associational", "confidence": "Moderate", "confidence_rationale": "61 primary reports with 6 selected partial-body examinations; density, heterogeneous controls and incomplete access set the confidence, not correctness.", "rests_on_non_peer_reviewed_work": false, "rationale": "The preregistered weakest-link rule yields Β from SC6. Direct human support for net protective pathogen-centered plaques is localization and ex vivo activity, without functional necessity, temporal demonstration or infection-stratified benefit. SC1–5 have mechanistic or simplified-model support (Γ); neither APP receptor immunity nor clinical antibody efficacy proves the nominal protective mechanism. This grade does not deny in vitro activity or refute all pathogen contributions." }, "score_after": { "hsef_level": "Β", "hsef_descriptor": "Associational", "confidence": "Moderate", "confidence_rationale": "61 primary reports with 6 selected partial-body examinations; density, heterogeneous controls and incomplete access set the confidence, not correctness.", "rests_on_non_peer_reviewed_work": false, "rationale": "The preregistered weakest-link rule yields Β from SC6. Direct human support for net protective pathogen-centered plaques is localization and ex vivo activity, without functional necessity, temporal demonstration or infection-stratified benefit. SC1–5 have mechanistic or simplified-model support (Γ); neither APP receptor immunity nor clinical antibody efficacy proves the nominal protective mechanism. This grade does not deny in vitro activity or refute all pathogen contributions." }, "independent_blinded_audit": false, "raw_receipts": [ { "path": "deliverables\\hsef_v53_neurodegeneration_2026-10-03\\antimicrobial-amyloid\\consensus\\consensus-evidence-cards.json", "sha256": "b9161e4fe09f878240f5cced21cc147f52f3e2aca25c4b51b80dd122a26dcb79" }, { "path": "deliverables\\hsef_v53_neurodegeneration_2026-10-03\\antimicrobial-amyloid\\consensus\\consensus-evidence-cards.md", "sha256": "041200191e1c711476851abd8e7674a624873be375270715244cd54f481651b9" }, { "path": "deliverables\\hsef_v53_neurodegeneration_2026-10-03\\antimicrobial-amyloid\\discovery\\consensus-discovery.json", "sha256": "eb129a8983428df6194e4c70e5ec38a73681f09ddcc913e3f9eb84063b7bc5d5" }, { "path": "deliverables\\hsef_v53_popularity_ranks_41_45_2026-10-08\\antimicrobial-amyloid\\consensus\\broad-ax.txt", "sha256": "f0adadb31bb1bb75b2c5b94d437a8d62a9bb21a0e006361886b4d1c4bfad0ec9" }, { "path": "deliverables\\hsef_v53_popularity_ranks_41_45_2026-10-08\\antimicrobial-amyloid\\consensus\\reconciliation.md", "sha256": "0fb45f06624435cb0e4da26a5f77621c48b7371fe8b370151439bb9ba7764ae1" } ], "limitations": "This verifies documented historical use and links the record to the final edition. 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