CREB-Dependent Differential Complement Regulator Positioning for Activity-Based Synaptic Vulnerability Control
🧪 Overview
This hypothesis proposes that the CREB-BDNF-TrkB activity-dependent signaling cascade directly controls the spatial positioning and expression levels of complement regulators CD55 and CD46 on synaptic membranes, creating an activity-based tagging system for synaptic elimination. High-frequency neural activity triggers calcium influx and CaMKIV/PKA-mediated CREB1 phosphorylation at serine 133, which transcriptionally upregulates CD55 and CD46 expression while simultaneously promoting their trafficking to active synapses through BDNF-TrkB signaling. The TrkB-activated PI3K/Akt pathway enhances surface insertion of CD55/CD46 at frequently stimulated synapses by phosphorylating trafficking proteins and stabilizing regulator clustering, while the Ras/MAPK cascade reinforces this protective phenotype through sustained CREB activation. Conversely, synapses with low activity levels exhibit reduced CREB-mediated transcription, leading to diminished CD55 and CD46 surface expression and creating microdomains of complement vulnerability.
...🧬 Mechanism
Curated pathway from expert analysis
flowchart TD
A["CD55 DAF, CD46 MCP<br/>Hypothesis Target"]
B["Complement<br/>Cited Mechanism"]
C["Cellular Response<br/>Stress or Clearance Change"]
D["Neural Circuit Effect<br/>Synapse/Glia Vulnerability"]
E["Neurodegeneration<br/>Disease-Relevant Outcome"]
A --> B
B --> C
C --> D
D --> E
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style B fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
style E fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a⚖️ Evidence
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — CREB1
No curated PDB or AlphaFold mapping for CREB1 yet. Search RCSB →
💉 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 CREB1, CD55, CD46.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
🏆 Tournament
🏆 Arenas / Elo
📊 Market Indicators
💾 Resource Usage
▸Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesizer
| source | v1_phase_c_backfill |
| origin_type | debate_synthesizer |
| _schema_version | 1 |