ID: h-d083850487
Hypothesis
TREM2-dependent microglial phagocytosis of tau seeds
Cystatin-C-activated TREM2 microglia reduce tau pathology through enhanced phagocytosis of extracellular tau seeds.
EvidencePending (0%)📖 0 cit🗣 1 debates✓ 7 support✗ 2 oppose
✓ All Quality Gates Passed
🧪 Overview
Cystatin-C-activated TREM2 microglia reduce tau pathology through enhanced phagocytosis of extracellular tau seeds. Critical limitation: microglial phagocytosis can only address extracellular seeds, not intracellular neurofibrillary tangles. This severely limits therapeutic scope to disease prevention rather than modification of established pathology.
🧬 Mechanism
🧬 Curated Mechanism Pathway
Curated pathway from expert analysis
flowchart TD
A["Amyloid-beta Plaques<br/>Phospholipid Ligands"]
B["TREM2 Receptor<br/>Ligand Binding"]
C["TYROBP/DAP12<br/>ITAM Phosphorylation"]
D["SYK Kinase<br/>Activation"]
E["PLCG2<br/>IP3 + DAG Generation"]
F["Ca2+ Release<br/>Cytoskeletal Remodeling"]
G["Microglial Phagocytosis<br/>Plaque Compaction"]
A --> B
B --> C
C --> D
D --> E
E --> F
F --> G
style A fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
style G fill:#1b5e20,stroke:#81c784,color:#81c784⚖️ Evidence
⚖️ Evidence Matrix7 supports2 contradicts
Supports
Sleep deprivation exacerbates microglial reactivity and Aβ deposition in a TREM2-dependent manner in mice.
Supports
TREM2 drives microglia response to amyloid-β via SYK-dependent and -independent pathways.
Supports
TREM2-dependent activation of microglial cell protects photoreceptor cell during retinal degeneration via PPARγ and CD36.
Supports
TREM2 dependent and independent functions of microglia in Alzheimer's disease.
📖 Linked Papers
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — TREM2
🧠 GTEx v10 Brain ExpressionJSON
Median TPM across 13 brain regions for TREM2/Syk/PLCγ2 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 TREM2.
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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Stable
7d Momentum
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Volatility
Low
0.0076
Events (7d)
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Price History
▼1.9%💾 Resource Usage
LLM Tokens
11,154
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Total Cost
$0.0335
🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF TREM2 is pharmacologically activated (via systemic administration of a TREM2 agonistic antibody at 10mg/kg twice weekly for 4 weeks) in 3-month-old P301S tauopathy mice, THEN extracellular tau seed | ≥50% reduction in extracellular tau seeds (seed-competent species detectable by RT-QuIC) within 4 weeks of TREM2 activation | — no observation — | pending | 0.60 |
| IF TREM2 is activated (via cross-linked agonistic antibody) in primary microglia co-cultured with pre-formed tau fibrils, THEN intracellular aggregated tau will NOT decrease below baseline after 72 ho | No reduction in intracellular tau aggregates (<5% change) despite ≥2-fold enhancement of extracellular tau phagocytosis | — no observation — | pending | 0.55 |
🔮 Falsifiable Predictions (2)
pendingconf 60%
IF TREM2 is pharmacologically activated (via systemic administration of a TREM2 agonistic antibody at 10mg/kg twice weekly for 4 weeks) in 3-month-old P301S tauopathy mice, THEN extracellular tau seed levels will decrease by ≥50% compared to vehicle-treated controls, as measured by immunoprecipitati
Predicted outcome: ≥50% reduction in extracellular tau seeds (seed-competent species detectable by RT-QuIC) within 4 weeks of TREM2 activation
Falsification: No significant reduction (<20%) in extracellular tau seed levels despite confirmed TREM2 pathway engagement (p-Syk/PLCγ2 elevation); OR increase in extracellular tau seeds
pendingconf 55%
IF TREM2 is activated (via cross-linked agonistic antibody) in primary microglia co-cultured with pre-formed tau fibrils, THEN intracellular aggregated tau will NOT decrease below baseline after 72 hours, despite confirmed enhancement of phagocytosis (≥2-fold increase in pHrodo-labeled tau uptake),
Predicted outcome: No reduction in intracellular tau aggregates (<5% change) despite ≥2-fold enhancement of extracellular tau phagocytosis
Falsification: Significant reduction (>30%) in intracellular aggregated tau following TREM2 activation, indicating clearance of intracellular material contradicts the stated mechanism limitation
▸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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