🧪
hypothesis

Complement C1q/C3 Blockade for Alzheimer's Disease

Hypothesis

Complement C1q/C3 Blockade for Alzheimer's Disease

Microglia-mediated complement activation (C1q, C3) leads to excessive synaptic pruning in AD.
🧬 C1QA🩺 neurodegeneration🎯 Composite 62%💱 $0.56▼8.2%proposed
EvidencePending (0%)📖 0 cit🗣 1 debates 4 support 4 oppose
✓ All Quality Gates Passed
Mechanistic 0.55 (15%) Evidence 0.65 (15%) Novelty 0.65 (12%) Feasibility 0.70 (12%) Impact 0.60 (12%) Druggability 0.78 (10%) Safety 0.40 (8%) Competition 0.60 (6%) Data Avail. 0.68 (5%) Reproducible 0.58 (5%) KG Connect 0.50 (8%) 0.619 composite
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arXiv PreprintNeurIPSNature MethodsPLOS ONE
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Composite62%

🧪 Overview

Microglia-mediated complement activation (C1q, C3) leads to excessive synaptic pruning in AD. Tau pathology sensitizes neurons to complement-mediated attack. Blocking C1q or C3 may prevent synapse loss independent of amyloid/tau pathology, though complement has homeostatic roles in debris clearance and plasticity.

🧬 Mechanism

No curated mechanism pathway recorded for this hypothesis.

⚖️ Evidence

⚖️ Evidence Matrix4 supports4 contradicts
Supports
C1q deposition on synapses precedes neurodegeneration in AD
PMID:25907089
Supports
C3 deficiency or CR3 blockade protects against synaptic loss in 5xFAD mice
PMID:30021919
Supports
C1q antibody ANX-005 demonstrated safety in Phase I trials
PMID:NCT04517370
Supports
C1qa knockout in P301S tau mice shows reduced synapse loss
PMID:review
Contradicts
C3-deficient AD mice show increased dystrophic neurites and impaired plaque compaction
PMID:32533948
Contradicts
C1q-mediated pruning is essential for normal brain development and adult plasticity
PMID:17287540
Contradicts
Synapse number does not always correlate with cognitive function in AD trials
PMID:review
Contradicts
Systemic complement blockade increases infection risk (meningococcal, encapsulated bacteria)
PMID:review
📖 Linked Papers

No linked papers recorded for this hypothesis yet.

🏥 Translation

🧬 3D Protein Structure — C1QA

🧬 PDB 1PK6 Click to expand

Experimental structure from RCSB PDB | Powered by Mol*

💉 Clinical Trials

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📊 Market Indicators

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💾 Resource Usage

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