ID: h-26d64f6a47
Hypothesis

Therapeutic Repurposing: C1-INH as Plaque-Stabilizing Agent

Therapeutic Repurposing: C1-INH as Plaque-Stabilizing Agent starts from the claim that modulating C1R/C1S within the disease context of neuroinflammation can redirect a disease-relevant process.
🧬 C1R/C1S🩺 neuroinflammation🎯 Composite 53%💱 $0.53▼0.3%proposed
EvidencePending (0%)📖 0 cit🗣 1 debates 4 support 4 oppose
✓ All Quality Gates Passed
Mechanistic 0.52 (15%) Evidence 0.52 (15%) Novelty 0.48 (12%) Feasibility 0.58 (12%) Impact 0.62 (12%) Druggability 0.58 (10%) Safety 0.50 (8%) Competition 0.55 (6%) Data Avail. 0.55 (5%) Reproducible 0.52 (5%) KG Connect 0.50 (8%) 0.530 composite

🧪 Overview

Mechanistic Overview


Therapeutic Repurposing: C1-INH as Plaque-Stabilizing Agent starts from the claim that modulating C1R/C1S within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Therapeutic Repurposing: C1-INH as Plaque-Stabilizing Agent starts from the claim that modulating C1R/C1S within the disease context of neuroinflammation can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Therapeutic Repurposing: C1-INH as Plaque-Stabilizing Agent starts from the claim that Recombinant C1-esterase inhibitor (Ruconest) blocks C1R/C1S proteolytic activity, preventing classical pathway activation without affecting lectin or alternative pathways. This reduces opsonization of apoptotic cells, C5b-9 formation, and downstream inflammatory cytokine production, promoting a more stable plaque phenotype. The hypothesis leverages an already-approved biologic with established safety data. Framed more explicitly, the hypothesis centers C1R/C1S within the broader disease setting of neuroinflammation.

...

🧬 Mechanism

🧬 Curated Mechanism Pathway

Curated pathway from expert analysis

flowchart TD
    A["C1 Complex<br/>C1Q Binding to Surface"]
    B["C1R Autoactivation<br/>Zymogen Cleavage"]
    C["C1S Activation<br/>Esterase Activity Triggered"]
    D["C4 Cleavage<br/>C4a Anaphylatoxin + C4b"]
    E["C2 Cleavage<br/>C2b Fragments"]
    F["C3 Convertase<br/>C4b2a Complex Assembly"]
    G["C3b Deposition<br/>Opsonization of Targets"]
    H["C5 Convertase<br/>C4b2aC3b Complex"]
    I["C5a Release<br/>Potent Inflammatory Mediator"]
    J["Microglial Activation<br/>CR3-Receptor Engagement"]
    A --> B
    B --> C
    C --> D
    D --> E
    D --> F
    F --> G
    F --> H
    H --> I
    G --> J
    style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
    style I fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
    style J fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a

⚖️ Evidence

⚖️ Evidence Matrix4 supports4 contradicts
Supports
C1-INH mechanism and clinical use established for hereditary angioedema
Supports
C1-INH reduces inflammation in ischemia-reperfusion models
Supports
C1Q identified as atherosclerosis risk gene in index paper
Supports
C1-INH is FDA-approved with established safety profile
Contradicts
C1-INH has broad effects beyond C1R/C1S (kallikrein, FXIIa, plasmin)
Contradicts
Classical pathway blockade may shunt activation to lectin/alternative pathways
Contradicts
Hereditary angioedema patients on C1-INH lack reported atherosclerosis outcomes
Contradicts
Acute 8-week administration may not model decades-long human disease development
📖 Linked Papers

No linked papers recorded for this hypothesis yet.

🏥 Translation

🧬 3D Protein Structure — C1R

No curated PDB or AlphaFold mapping for C1R yet. Search RCSB →

🧠 GTEx v10 Brain ExpressionJSON

Median TPM across 13 brain regions for C1R/C1S from GTEx v10.

Spinal cord cervical c-115.2 Caudate basal ganglia12.3 Substantia nigra11.8 Cortex11.4 Putamen basal ganglia11.3 Frontal Cortex BA910.5 Amygdala9.8 Hypothalamus9.6 Nucleus accumbens basal ganglia9.5 Anterior cingulate cortex BA248.9 Hippocampus8.7 Cerebellum8.3 Cerebellar Hemisphere6.2median 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 C1R →

No DepMap CRISPR Chronos data found for C1R.

Run python3 scripts/backfill_hypothesis_depmap.py to populate.

💰 Estimated Development
Cost
$0
Timeline

🏆 Tournament

🏆 Arenas / Elo

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📊 Market Indicators

7d Trend
Stable
7d Momentum
▲ 0.0%
Volatility
Low
0.0049
Events (7d)
0
Price History
▼0.3%

💾 Resource Usage

LLM Tokens
28,692
$0.0861
Total Cost
$0.0861

🔮 Predictions

🔎 Predictions vs Observations2 predictions · 0 with recorded observations
PredictionPredictedObservedStatusConf
IF 5xFAD mice receive intraperitoneal C1-INH (Ruconest) at 80 U/kg thrice weekly for 8 weeks starting at 6 months of age, THEN we expect measurable reduction in hippocampal C1q deposition and CD68+ mi≥30% reduction in C1q immunoreactivity co-localized with Thioflavin-S+ plaques; ≥25% reduction in CD68+ microglial area coverage per plaque; reduction in hippoc— no observation —pending0.45
IF patients with prodromal Alzheimer's disease (CSF p-tau181/Aβ42 positive, MMSE 24-28, n=80) receive off-label Ruconest at 50 U/kg IV infusions twice weekly for 12 weeks, THEN we expect measurable re≥35% reduction in CSF C4a concentration; ≥25% reduction in CSF IL-6; stabilization of cognitive decline (CDR-SB change ≤0.5) during 12-week treatment window— no observation —pending0.38
🔮 Falsifiable Predictions (2)
pendingconf 45%
IF 5xFAD mice receive intraperitoneal C1-INH (Ruconest) at 80 U/kg thrice weekly for 8 weeks starting at 6 months of age, THEN we expect measurable reduction in hippocampal C1q deposition and CD68+ microglial coverage of amyloid plaques compared to vehicle-treated controls within 12 weeks.
Predicted outcome: ≥30% reduction in C1q immunoreactivity co-localized with Thioflavin-S+ plaques; ≥25% reduction in CD68+ microglial area coverage per plaque; reduction
Falsification: No statistically significant difference in C1q deposition, microglial activation markers, or hippocampal cytokines between C1-INH-treated and vehicle-treated 5xFAD mice (p>0.05, two-tailed t-test)
pendingconf 38%
IF patients with prodromal Alzheimer's disease (CSF p-tau181/Aβ42 positive, MMSE 24-28, n=80) receive off-label Ruconest at 50 U/kg IV infusions twice weekly for 12 weeks, THEN we expect measurable reduction in CSF C4a and IL-6 levels compared to propensity-score matched standard-of-care controls wi
Predicted outcome: ≥35% reduction in CSF C4a concentration; ≥25% reduction in CSF IL-6; stabilization of cognitive decline (CDR-SB change ≤0.5) during 12-week treatment
Falsification: No statistically significant change in CSF complement activation markers (C4a, C3a) or inflammatory cytokines (IL-6, TNF-α) between Ruconest-treated and control groups; or accelerated cognitive declin

📖 References (3)

  1. Electronic clinical challenges and images in GI: image 3. Small depressed colon cancer.
    ["Chen et al.. Gastroenterology (2008)
  2. Anticoccidial Activity of Qinghao Powder Against Eimeria tenella in Broiler Chickens.
    ["Wang et al.. Frontiers in veterinary science (2021)
  3. An integrative analysis of single-cell and bulk transcriptome and bidirectional mendelian randomization analysis identified C1Q as a novel stimulated risk gene for Atherosclerosis.
    Cui HK et al.. Front Immunol (2023)
Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesizer
sourcev1_phase_c_backfill
origin_typedebate_synthesizer
_schema_version1
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting 0 contradicting 0 neutral
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