ID: h-c8d2ea20
Hypothesis

Selective C1q-CRP vs. C1q-IgG Axis Inhibition

Selective C1q-CRP vs.
🧬 C1QA/C1QB/C1QC, CRP, FCGR1A🩺 neuroinflammation🎯 Composite 60%💱 $0.57▼1.9%promoted
EvidencePending (0%)📖 4 cit🗣 1 debates 3 support 2 oppose
✓ All Quality Gates Passed
Mechanistic 0.60 (15%) Evidence 0.55 (15%) Novelty 0.65 (12%) Feasibility 0.50 (12%) Impact 0.75 (12%) Druggability 0.55 (10%) Safety 0.70 (8%) Competition 0.60 (6%) Data Avail. 0.50 (5%) Reproducible 0.60 (5%) KG Connect 0.08 (8%) 0.597 composite

🧪 Overview

Mechanistic Overview


Selective C1q-CRP vs. C1q-IgG Axis Inhibition starts from the claim that modulating C1QA/C1QB/C1QC, CRP, FCGR1A within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Selective C1q-CRP vs. C1q-IgG Axis Inhibition starts from the claim that modulating C1QA/C1QB/C1QC, CRP, FCGR1A within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Selective C1q-CRP vs. C1q-IgG Axis Inhibition starts from the claim that C1q Isoform-Selective Modulation by Alectinib: Differential Inhibition of CRP-Triggered vs. IgG-Mediated Complement Activation in AD. The C1q globular head recognizes multiple ligands through distinct but overlapping interfaces. Alectinib preferentially blocks the C1q-CRP binding epitope while preserving the C1q-IgG interaction surface, achieving therapeutic synaptic protection without immunodeficiency risk. Framed more explicitly, the hypothesis centers C1QA/C1QB/C1QC, CRP, FCGR1A within the broader disease setting of neuroinflammation.

...

🧬 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 Matrix3 supports2 contradicts
Supports
C1q globular head has distinct binding sites for CRP vs. IgG
Supports
Alectinib@MM-NLCs reduce C1q expression and NLRP3 inflammasome activation
Supports
C1q-CRP complex preferentially activates the classical complement pathway in inflammation
Contradicts
C1q ligand recognition depends on specific hydrophobic and electrostatic interactions at the trimeric interface, not on Ca2+ coordination as proposed in selective binding models
Contradicts
Binding and complement activation by C-reactive protein via the collagen-like region of C1q and inhibition of these reactions by monoclonal antibodies to C-reactive protein and C1q.
J Immunol1991PMID:2005402

🏥 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/C1QB/C1QC, CRP, FCGR1A 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

🏆 Arenas / Elo

No arena matches recorded yet. Browse Arenas →

📊 Market Indicators

7d Trend
Stable
7d Momentum
▼ 0.4%
Volatility
Low
0.0086
Events (7d)
2
Price History
▼1.9%

💾 Resource Usage

LLM Tokens
33,738
$0.1012
Total Cost
$0.1012

🔮 Predictions

🔎 Predictions vs Observations2 predictions · 0 with recorded observations
PredictionPredictedObservedStatusConf
IF 5xFAD transgenic mice (model of amyloid-driven neuroinflammation) receive chronic oral alectinib (50 mg/kg/day) for 8 weeks starting at 4 months of age, THEN synaptic density (measured by PSD95+ puDual outcome: (1) hippocampal synaptic integrity preserved in alectinib-treated 5xFAD mice compared to vehicle; (2) systemic complement function within normal r— no observation —pending0.50
IF alectinib (1–10 μM, pharmacologically relevant concentration) is applied to human iPSC-derived neuron–microglia co-cultures challenged with recombinant CRP (10–50 μg/mL) to model CRP-driven neuroinSelective inhibition of C1q-CRP interaction (≥50% reduction) with preservation of C1q-IgG binding (≥80% retention), as quantified by surface plasmon resonance o— no observation —pending0.55
🔮 Falsifiable Predictions (2)
pendingconf 55%
IF alectinib (1–10 μM, pharmacologically relevant concentration) is applied to human iPSC-derived neuron–microglia co-cultures challenged with recombinant CRP (10–50 μg/mL) to model CRP-driven neuroinflammation, THEN C1q-CRP complex formation will be reduced by >50% while C1q-IgG immune complex bind
Predicted outcome: Selective inhibition of C1q-CRP interaction (≥50% reduction) with preservation of C1q-IgG binding (≥80% retention), as quantified by surface plasmon r
Falsification: C1q-IgG binding is reduced by >20% OR C1q-CRP inhibition is <30%, indicating lack of selectivity; or both pathways are inhibited equivalently, disproving the axis-specific claim.
pendingconf 50%
IF 5xFAD transgenic mice (model of amyloid-driven neuroinflammation) receive chronic oral alectinib (50 mg/kg/day) for 8 weeks starting at 4 months of age, THEN synaptic density (measured by PSD95+ puncta in hippocampal CA1) will be preserved to ≥80% of non-transgenic controls while serum hemolytic
Predicted outcome: Dual outcome: (1) hippocampal synaptic integrity preserved in alectinib-treated 5xFAD mice compared to vehicle; (2) systemic complement function withi
Falsification: CH50 drops below 50% of vehicle-treated mice (indicating clinically significant complement deficiency) OR synaptic density in alectinib-treated 5xFAD mice falls below 60% of non-transgenic controls (i

📖 References (3)

  1. Interaction of C1q with IgG1, C-reactive protein and pentraxin 3: mutational studies using recombinant globular head modules of human C1q A, B, and C chains.
    Biochemistry (2006)
  2. Complement C1q-Targeted Microglial Membrane Camouflaged Nanolipid Carriers for Synaptic Protection in Alzheimer's Disease: A Bioinspired Alectinib Delivery Strategy.
    Ding YN et al.. Nano letters (2026)
  3. Binding and complement activation by C-reactive protein via the collagen-like region of C1q and inhibition of these reactions by monoclonal antibodies to C-reactive protein and C1q.
    ["Jiang HX" et al.. J Immunol (1991)
Metadatasource: v1_phase_c_backfill · origin_type: gap_debate
sourcev1_phase_c_backfill
origin_typegap_debate
_schema_version1
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting 0 contradicting 0 neutral
Public annotations (0)Annotate on Hypothes.is →
No public annotations yet.