Concise Statement: There exists a critical threshold of epigenetic age acceleration (~4–6 years above chronological age) above which the transition from amyloid deposition to tau propagation becomes dramatically accelerated, explaining the highly variable lag between amyloid positivity and clinical symptom onset across individuals.
Curated pathway from expert analysis
flowchart TD
A["MAPT/Tau Protein<br/>Microtubule Stabilizer"]
B["CDK5/GSK3B Activation<br/>Kinase Dysregulation"]
C["Tau Hyperphosphorylation<br/>Ser396/Thr231/Ser202"]
D["Tau Detachment<br/>Microtubule Destabilized"]
E["Tau Oligomers<br/>Paired Helical Filaments"]
F["Neurofibrillary Tangles<br/>Intraneuronal Inclusions"]
G["Axonal Transport Failure<br/>Synaptic Dysfunction"]
H["Neurodegeneration<br/>Tauopathy Spread"]
A --> B
B --> C
C --> D
D --> E
E --> F
D --> G
G --> H
F --> H
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style C fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
style H fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9aMedian TPM across 13 brain regions for MAPT from GTEx v10.
No clinical trials data linked to this hypothesis yet.
No curated ClinVar variants loaded for this hypothesis.
Run scripts/backfill_clinvar_variants.py to fetch P/LP/VUS variants.
No DepMap CRISPR Chronos data found for MAPT.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF the clock-threshold model is causal rather than correlative, THEN lowering senescence-associated methylation age in amyloid mouse models will reduce hippocampal phospho-tau burden by >=20% within 1 | Intervention lowers hippocampal p-tau immunoreactivity by >=20% versus control while amyloid plaque area changes by <10%. | — no observation — | pending | 0.52 |
| IF epigenetic age acceleration moderates amyloid-to-tau conversion, THEN amyloid-positive older adults above a +5 year methylation-age threshold will accumulate tau PET signal at least 25% faster over | Annual regional tau PET SUVR slope is >=25% higher in the high epigenetic-age group after covariate adjustment. | — no observation — | pending | 0.64 |