🧪
hypothesis

C1Q-Mediated Defective Efferocytosis Driving Necrotic Core Expansion

Hypothesis

C1Q-Mediated Defective Efferocytosis Driving Necrotic Core Expansion

C1Q-Mediated Defective Efferocytosis Driving Necrotic Core Expansion starts from the claim that modulating C1QA/C1QC within the disease context of neuroinflammation can redirect a disease-relevant process.
🧬 C1QA/C1QC🩺 neuroinflammation🎯 Composite 60%💱 $0.55▼8.7%proposed
🧠 Neurodegeneration
EvidencePending (0%)📖 0 cit🗣 1 debates 4 support 4 oppose
✓ All Quality Gates Passed
Mechanistic 0.50 (15%) Evidence 0.55 (15%) Novelty 0.55 (12%) Feasibility 0.68 (12%) Impact 0.65 (12%) Druggability 0.60 (10%) Safety 0.52 (8%) Competition 0.58 (6%) Data Avail. 0.60 (5%) Reproducible 0.55 (5%) KG Connect 0.50 (8%) 0.600 composite
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Composite60%

🧪 Overview

Mechanistic Overview


C1Q-Mediated Defective Efferocytosis Driving Necrotic Core Expansion starts from the claim that modulating C1QA/C1QC within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview C1Q-Mediated Defective Efferocytosis Driving Necrotic Core Expansion starts from the claim that modulating C1QA/C1QC within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview C1Q-Mediated Defective Efferocytosis Driving Necrotic Core Expansion starts from the claim that Chronic hyperactivation of classical complement in the atherosclerotic intima leads to C1S-mediated opsonization of late apoptotic foam cells, but paradoxically blocks efficient clearance. C5b-9 membrane attack complex deposition on surviving cells causes secondary necrosis, releasing cholesterol crystals and DAMPs that amplify local inflammation and expand the necrotic core. The hypothesis requires C1Q to 'flip' from its known homeostatic role to pathological at high lesional concentrations.

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🧬 Mechanism

🧬 Curated Mechanism Pathway

Curated pathway from expert analysis

flowchart TD
    A["Stressed Synapse<br/>C1q Ligand Exposed"]
    B["C1q Deposition<br/>Synaptic Tagging"]
    C["C3 Cleavage<br/>C3b Opsonization"]
    D["CR3 Recognition<br/>Microglial Receptor"]
    E["Synaptic Pruning<br/>Phagocytic Engulfment"]
    F["Synapse Loss<br/>Circuit Disruption"]
    G["Cognitive Decline<br/>Memory Impairment"]
    A --> B
    B --> C
    C --> D
    D --> E
    E --> F
    F --> G
    style A fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
    style G fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a

⚖️ Evidence

⚖️ Evidence Matrix4 supports4 contradicts
Supports
Botto M et al. establishes C1q role in apoptotic cell clearance
PMID:16205503
Supports
C1q binds apoptotic cells via calreticulin/CD91
PMID:24639361
Supports
Defective efferocytosis promotes necrotic core formation in murine atherosclerosis
PMID:19841018
Supports
C1S inhibitors exist in complement drug development pipelines
PMID:Multiple pharmaceutical sources
Contradicts
C1Q is canonically a promoter of efferocytosis, not an inhibitor - hypothesis inverts known role
PMID:16205503
Contradicts
C1Q deficiency causes defective clearance and autoimmunity, opposite direction
PMID:16205503
Contradicts
C1q-/- mice on hypercholesterolemic backgrounds have not consistently shown protection
PMID:NA - implicit falsification
Contradicts
Mechanistic threshold model for C1Q 'flip' not proposed
PMID:NA - mechanistic gap
📖 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*

🧠 GTEx v10 Brain ExpressionJSON

Median TPM across 13 brain regions for C1QA/C1QC from GTEx v10.

Spinal cord cervical c-174.7 Substantia nigra38.2median TPM (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.

🔍 Search ClinVar for C1QA →

No DepMap CRISPR Chronos data found for C1QA.

Run python3 scripts/backfill_hypothesis_depmap.py to populate.

💰 Estimated Development
Cost
$0
Timeline

🏆 Tournament

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📊 Market Indicators

7d Trend
Stable
7d Momentum
▼ 0.6%
Volatility
Low
0.0029
Events (7d)
3
Price History
▼8.7%

💾 Resource Usage

LLM Tokens
28,692
$0.0861
Total Cost
$0.0861

🔮 Predictions

🔎 Predictions vs Observations2 predictions · 0 with recorded observations
PredictionPredictedObservedStatusConf
IF CRISPR-mediated knockdown of C1QA/C1QC is performed in microglia/macrophages of aged 5xFAD mice (via AAV9 delivery to CNS at 6 months), THEN necrotic core volume in prefrontal cortex will decrease Necrotic core area measured by H&E staining and MAP2/NeuN costaining will be significantly reduced (p<0.01) in treatment group vs. control— no observation —pending0.52
IF plasma C1Q protein levels are stratified in the Alzheimer's Disease Neuroimaging Initiative (ADNI) cohort (n≥400 with baseline and 24-month follow-up), THEN subjects in the highest C1Q quartile wilBaseline C1Q concentration correlates positively with 24-month change in white matter hyperintensity volume and cortical thinning rate— no observation —pending0.38
🔮 Falsifiable Predictions (2)
pendingconf 52%
IF CRISPR-mediated knockdown of C1QA/C1QC is performed in microglia/macrophages of aged 5xFAD mice (via AAV9 delivery to CNS at 6 months), THEN necrotic core volume in prefrontal cortex will decrease by ≥40% compared to scrambled control at 8 weeks post-treatment.
Predicted outcome: Necrotic core area measured by H&E staining and MAP2/NeuN costaining will be significantly reduced (p<0.01) in treatment group vs. control
Falsification: Necrotic core volume does not decrease by ≥40%; alternatively, markers of apoptosis increase suggesting impaired clearance without necrotic core reduction
pendingconf 38%
IF plasma C1Q protein levels are stratified in the Alzheimer's Disease Neuroimaging Initiative (ADNI) cohort (n≥400 with baseline and 24-month follow-up), THEN subjects in the highest C1Q quartile will show 2-fold greater necrotic/cystic lesion expansion on serial MRI compared to lowest quartile.
Predicted outcome: Baseline C1Q concentration correlates positively with 24-month change in white matter hyperintensity volume and cortical thinning rate
Falsification: No significant association between C1Q quartile and lesion expansion rate; association reverses direction or disappears after correction for ApoE4 status

📖 References (3)

  1. Fecal microbial community in preterm infants.
    ["Magne et al.. Journal of pediatric gastroenterology and nutrition (2005)
    PubMed↗DOI↗
  2. Crystal structure of Bombyx mori arylphorins reveals a 3:3 heterohexamer with multiple papain cleavage sites.
    ["Hou et al.. Protein science : a publication of the Protein Society (2014)
    PubMed↗DOI↗
  3. Noise action plan of agglomerations: sustainable hypothesis or utopy?
    ["Magri et al.. Radiation protection dosimetry (2009)
    PubMed↗DOI↗
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