ID: h-0a073f51c0
Hypothesis
A post-trigger CDK5-dominant kinase feedback loop maintains dendritic phospho-tau missorting
Transient Aβ exposure activates local kinase programs, especially CDK5/p25 and possibly GSK3β, that keep tau phosphorylated at missorting-associated epitopes.
EvidencePending (0%)📖 7 cit🗣 1 debates✓ 7 support✗ 2 oppose
✓ All Quality Gates Passed
🧪 Overview
Transient Aβ exposure activates local kinase programs, especially CDK5/p25 and possibly GSK3β, that keep tau phosphorylated at missorting-associated epitopes. This would create a cell-autonomous phospho-tau maintenance state that survives Aβ withdrawal.
🧬 Mechanism
🧬 Curated Mechanism Pathway
Curated pathway from expert analysis
flowchart TD
A["Target Gene: MAPTCDK5CAPN1GSK3B"]
B["Molecular Mechanism<br/>Pathway Activation"]
C["Cellular Phenotype<br/>Neuronal / Glial Response"]
D["Network Effect<br/>Circuit-Level Consequence"]
E["Disease Relevance<br/>Neurodegeneration Link"]
A --> B --> C --> D --> E
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style E fill:#1b5e20,stroke:#81c784,color:#81c784⚖️ Evidence
⚖️ Evidence Matrix7 supports2 contradicts
Supports
CDK5 is a well-established driver of tau aggregation and can support a durable post-insult phosphorylation state.
Supports
Aβ-induced tau missorting is established, making kinase-locked persistence a plausible second step.
Supports
MAPT mutations, tauopathy, and mechanisms of neurodegeneration.
Supports
Endolysosomal impairment by binding of amyloid beta or MAPT/Tau to V-ATPase and rescue via the HYAL-CD44 axis in Alzheimer disease.
Supports
Tau-targeting antisense oligonucleotide MAPT(Rx) in mild Alzheimer's disease: a phase 1b, randomized, placebo-controlled trial.
Supports
Physiological and pathological phosphorylation of tau by Cdk5.
Supports
Interactions between Microtubule-Associated Protein Tau (MAPT) and Small Molecules.
Contradicts
Evidence for a specific dual GSK3β-CDK5 maintenance loop after Aβ withdrawal is weak; some acute systems emphasize CDK5 more than GSK3β.
Contradicts
Rescue by kinase inhibition may reflect generic stress suppression rather than reversal of a dedicated tau-maintenance circuit.
📖 Linked Papers
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — MAPT
🧠 GTEx v10 Brain ExpressionJSON
Median TPM across 13 brain regions for MAPT,CDK5,CAPN1,GSK3B from GTEx v10.
💉 Clinical Trials
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,CDK5,CAPN1,GSK3B.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
💰 Estimated Development
Cost
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Timeline
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📊 Market Indicators
7d Trend
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Events (7d)
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🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF human iPSC-derived neurons expressing MAPT are transiently exposed to oligomeric Aβ42 (5 μM, 6 hours) followed by washout and subsequent CDK5 inhibition (roscovitine, 10 μM) at 24-48 hours post-wit | Significant reduction in dendritic phospho-tau (AT8/PHF-1) fluorescence intensity in the CDK5 inhibition group compared to Aβ-withdrawal-only group, with effect | — no observation — | pending | 0.00 |
| IF primary neurons from CDK5 conditional knockout (CDK5-floxed; CAMKIIa-Cre) mice are exposed to Aβ42 (5 μM, 6 hours) followed by washout, THEN dendritic missorting of phospho-tau will be prevented or | Significant reduction in dendritic phospho-tau accumulation in CDK5 knockout neurons relative to wildtype controls, with at least 50% lower AT8 immunoreactivity | — no observation — | pending | 0.00 |
🔮 Falsifiable Predictions (2)
pendingconf 0%
IF human iPSC-derived neurons expressing MAPT are transiently exposed to oligomeric Aβ42 (5 μM, 6 hours) followed by washout and subsequent CDK5 inhibition (roscovitine, 10 μM) at 24-48 hours post-withdrawal, THEN phospho-tau immunoreactivity at missorting-associated epitopes (AT8, PHF-1) in dendrit
Predicted outcome: Significant reduction in dendritic phospho-tau (AT8/PHF-1) fluorescence intensity in the CDK5 inhibition group compared to Aβ-withdrawal-only group, w
Falsification: CDK5 inhibition after Aβ withdrawal fails to reduce dendritic phospho-tau at missorting epitopes by >20%, OR equivalent reduction occurs with broad-spectrum kinase inhibitors (e.g., staurosporine) tha
pendingconf 0%
IF primary neurons from CDK5 conditional knockout (CDK5-floxed; CAMKIIa-Cre) mice are exposed to Aβ42 (5 μM, 6 hours) followed by washout, THEN dendritic missorting of phospho-tau will be prevented or reduced by >50% at 48 hours post-withdrawal even without CDK5 re-expression, compared to Aβ-exposed
Predicted outcome: Significant reduction in dendritic phospho-tau accumulation in CDK5 knockout neurons relative to wildtype controls, with at least 50% lower AT8 immuno
Falsification: Dendritic phospho-tau missorting occurs equivalently (difference <20%) in CDK5 knockout and CDK5-intact neurons after Aβ withdrawal, indicating CDK5 is not essential for maintaining the phospho-tau fe
▸Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesizer
| source | v1_phase_c_backfill |
| origin_type | debate_synthesizer |
| _schema_version | 1 |
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting
0 contradicting
0 neutral
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