[2026-06-07] log
[2026-06-07] ingest | infectious hypothesis of AD + herpes-zoster-vaccine→dementia (YouTube-lead, user-prompted)
Triggered by a user request to mine a YouTube science-summary video (Brad Stanfield, “The EXACT Moment I Stopped Fearing Dementia”, naT5JJtthVk) for leads to augment the dementia pages. Followed scraping-youtube-references: pulled description (13 reference links) + auto-caption transcript via yt-dlp, resolved every link to real metadata, mapped claims → papers, and discounted the affiliate/supplement segment per SOP discipline. Video never cited; all claims traced to primaries.
Reference resolution (13 description links → papers)
| Link | Resolves to | Used? |
|---|---|---|
| PMC8597989 | Scherrer 2021 PLoS One (10.1371/journal.pone.0257405) — observational HZ-vax 31%↓ dementia | ✅ |
| PMC10246135 | Eyting 2023 medRxiv preprint → published Nature 2025 (10.1038/s41586-025-08800-x) | ✅ (published version) |
| PMC9006884 | Vojtechova 2022 PLoS Pathogens (10.1371/journal.ppat.1010929) — Aβ-as-antimicrobial-peptide | ✅ |
| Cell S0092-8674(25)01256-5 | Xie/Geldsetzer 2025 Cell 188(25):7049 (10.1016/j.cell.2025.11.007) — disease-course follow-up | ✅ |
| NEJMoa1501184 | Lal 2015 NEJM ZOE-50 (Shingrix efficacy) | ✅ (ethics-of-RCT point) |
| PMC11485228 | Taquet 2024 Nat Med (10.1038/s41591-024-03201-5) — recombinant vs live | ✅ |
| s41586-025-09335-x | Aron/Yankner 2025 Nature 645 — lithium deficiency & AD onset | ✅ |
| Lancet 01296-0 | Livingston 2024 Lancet Commission (hearing loss / 14 risk factors) | ✗ (out of scope — modifiable-RF; not AD-mechanism) |
| PMC11103094 | Vyas 2024 COSMOS AJCN — multivitamin cognition | ✗ (supplement-marketing segment) |
| PMID 30958356 | Jernerén 2019 OmegAD JAD — omega-3 × homocysteine | ✗ (supplement segment; note: video’s “7.1%/22.3%” numbers not in this paper) |
| PMC8912287 | Forbes 2022 Nutrients — creatine brain | ✗ (supplement segment) |
| nuac064 | Prokopidis 2022 Nutr Rev — creatine memory meta-analysis | ✗ (supplement segment) |
| PMC3610948 | McRae 2013 J Chiropr Med — betaine→homocysteine | ✗ (supplement segment) |
Plus mechanistic primary added beyond the video’s list: Bubak 2020 J Infect Dis (10.1093/infdis/jiz560) — VZV→astrocyte amyloidogenesis.
Updated (both verified pages; new sections abstract/full-text-summary level, scope addenda added)
- updated:
phenotypes/alzheimers-disease.md- new § “Infectious hypothesis and herpes-zoster vaccination” (after Sex differences): antimicrobial-protection hypothesis (Vojtechova 2022); VZV as chief suspect via direct astrocytic amyloidogenesis (Bubak 2020) + cerebral vasculopathy → spans AD and vascular dementia; then the quasi-experimental vaccine cascade — observational baseline + healthy-vaccinee confound (Scherrer 2021), RCT-is-unethical (Lal 2015), the Welsh natural experiment regression-discontinuity (Eyting 2025: uptake 0.01%→47.2%; ITT −1.3 pp/−8.5%; IV −3.5 pp/−20.0% over 7 yr; women-predominant), disease-course follow-up (Xie 2025: MCI −3.1 pp; dementia-mortality −29.5 pp among already-diagnosed, wide CI), recombinant>live (Taquet 2024: RMTL 0.83, +164 d). Interpretation: VZV-specific vs trained-immunity unresolved; female-predominance unexplained.
- new § “Endogenous lithium depletion (emerging mechanism)” under investigational targets: Aron/Yankner 2025 — Li only metal ↓ in MCI; Aβ sequesters Li; ~50% cortical Li depletion → ↑Aβ/p-tau/neuroinflammation in mice; plaque-evading lithium orotate rescues at sub-bipolar doses. Flagged gap/needs-human-replication; “lithium orotate supplementation” framing called out as outrunning data.
- updated:
phenotypes/neurodegeneration.md— added shared-mechanistic-feature §6 “Latent viral reactivation (emerging risk modifier)”, compact, points to AD page for detail (atomic-model: no duplication). Notes vascular-dementia page is a stub candidate.
Effect-size verification
All quantitative claims cross-confirmed against PMC full-text-derived summaries + multiple independent secondary sources (Nature/Cell numbers matched exactly; no abstract-sign-inversion issues — video characterized effect sizes accurately). NOT yet read end-to-end against primary PDFs → both pages’ verified-scope updated to mark the new sections abstract/summary-level, pending a wiki-verifier PDF pass.
Gaps surfaced / follow-ups
- No virus page-type in schema — VZV warrants an atomic entity page but
type: microbeexcludes viruses (kingdom enum = bacteria/archaea/fungi/protist).[[varicella-zoster-virus]]left as plain text (not a dangling link) pending a schema decision on a virus page-type. → user decision needed. - No
phenotypes/vascular-dementia.md— referenced by the VZV mechanism (dual AD + vascular). stub candidate. - Dedicated
studies/pages for the keystone sources (Eyting 2025, Xie 2025, Taquet 2024, Scherrer 2021, Vojtechova 2022, Bubak 2020, Aron/Yankner 2025) not yet seeded — cited as bare-DOI footnotes (matches this page’s recent-additions precedent). Eyting 2025 + Aron/Yankner 2025 are multiply-cite-worthy keystones → seed first. interventions/pharmacological/zoster-vaccine.md(or a vaccine intervention page) is a natural home for the full vaccine-repurposing evidence if it grows beyond the AD page.- Pre-existing dangling link unchanged:
[[hypotheses/amyloid-cascade-hypothesis]](“(stub)”) referenced from AD page but file absent. - Supplement quartet + hearing-aids (Lancet Commission) deliberately not ingested — affiliate-promotional / not AD-mechanism; revisit hearing loss as a modifiable-RF if a prevention section is built.