ID: h-5d68a7d2
Hypothesis
Microglial TREM2 Activation to Enhance Synaptic Pruning Regulation
Microglial TREM2 Activation to Enhance Synaptic Pruning Regulation.
EvidencePending (0%)📖 0 cit🗣 1 debates✓ 5 support✗ 4 oppose
🧪 Overview
Microglial TREM2 Activation to Enhance Synaptic Pruning Regulation
🧬 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 Matrix5 supports4 contradicts
Supports
TREM2 agonist promotes microglial clustering around plaques and reduces neurite dystrophy
Contradicts
AL002c (TREM2 agonist) failed to meet primary endpoint in INVOKE-2 Phase 2 trial (2024)
Contradicts
TREM2 deficiency reduces amyloid pathology in some contexts (reduced microglial clustering)
Contradicts
Microglial states in AD are heterogeneous - single pathway modulation insufficient
📖 Linked Papers
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — MICROGLIAL
No curated PDB or AlphaFold mapping for MICROGLIAL yet. Search RCSB →
🧠 GTEx v10 Brain ExpressionJSON
Median TPM across 13 brain regions for Microglial TREM2 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 Microglial TREM2.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
🏆 Tournament
🏆 Arenas / Elo
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🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF we administer a selective TREM2 agonist (anti-TREM2 agonistic antibody at 10mg/kg, weekly ip) to 6-month-old 5xFAD mice for 8 weeks, THEN we will observe a significant reduction in cortical synapti | ≥20% reduction in excitatory synapse density (PSD-95/vGLUT1 puncta) in cortical layer 5 neurons in the agonist-treated group versus vehicle controls | — no observation — | pending | 0.65 |
| IF we perform longitudinal in vivo two-photon microscopy to monitor dendritic spine turnover in Trem2^R47H knock-in mice crossed with Thy1-YFP reporters following a 4-week regimen of TREM2-activating | Spine elimination rate increases to ≥0.05eliminations/hour with unchanged spine formation rate (<0.05/hour), yielding net spine density reduction of 15-25% | — no observation — | pending | 0.58 |
🔮 Falsifiable Predictions (2)
pendingconf 65%
IF we administer a selective TREM2 agonist (anti-TREM2 agonistic antibody at 10mg/kg, weekly ip) to 6-month-old 5xFAD mice for 8 weeks, THEN we will observe a significant reduction in cortical synaptic density (measured by PSD-95+ vGLUT1 colocalization via confocal microscopy) compared to vehicle-tr
Predicted outcome: ≥20% reduction in excitatory synapse density (PSD-95/vGLUT1 puncta) in cortical layer 5 neurons in the agonist-treated group versus vehicle controls
Falsification: No significant difference in synaptic density between TREM2 agonist and vehicle groups (p>0.05) OR paradoxical increase in synapse number, indicating impaired rather than enhanced pruning
pendingconf 58%
IF we perform longitudinal in vivo two-photon microscopy to monitor dendritic spine turnover in Trem2^R47H knock-in mice crossed with Thy1-YFP reporters following a 4-week regimen of TREM2-activating nanobodies (0.5mg/kg, biweekly), THEN we will observe increased spine elimination rate (≥30% elevati
Predicted outcome: Spine elimination rate increases to ≥0.05eliminations/hour with unchanged spine formation rate (<0.05/hour), yielding net spine density reduction of 1
Falsification: Spine elimination rate remains unchanged (<5% difference from baseline) or spine formation rate increases significantly, indicating TREM2 activation does not selectively enhance pruning
▸Metadatasource: v1_phase_c_backfill · origin_type: gap_debate
| source | v1_phase_c_backfill |
| origin_type | gap_debate |
| _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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