Alectinib's Putative C1q Binding Derives from Hydrophobic Aggregation Rather Than Direct Protein-Protein Interaction

Target: C1Q Composite Score: 0.105 Price: $0.33▲210.9% Citation Quality: Pending molecular biology Status: proposed
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🔥 Neuroinflammation 🧠 Neurodegeneration
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Evidence Strength Pending (0%)
8
Citations
1
Debates
4
Supporting
4
Opposing
Quality Report Card click to collapse
F
Composite: 0.105
Top 99% of 1833 hypotheses
T4 Speculative
Novel AI-generated, no external validation
Needs 1+ supporting citation to reach Provisional
C+ Mech. Plausibility 15% 0.50 Top 76%
C+ Evidence Strength 15% 0.50 Top 57%
C+ Novelty 12% 0.50 Top 81%
C+ Feasibility 12% 0.50 Top 64%
C+ Impact 12% 0.50 Top 85%
C+ Druggability 10% 0.50 Top 58%
C+ Safety Profile 8% 0.50 Top 57%
C+ Competition 6% 0.50 Top 77%
C+ Data Availability 5% 0.50 Top 70%
C+ Reproducibility 5% 0.50 Top 62%
Evidence
4 supporting | 4 opposing
Citation quality: 0%
Debates
2 sessions B+
Avg quality: 0.75
Convergence
0.24 F 10 related hypothesis share this target

From Analysis:

Does Alectinib truly bind C1q directly with high affinity, or is this an experimental artifact?

The fundamental premise remains unvalidated despite extensive mechanistic speculation. Independent validation using purified proteins and orthogonal binding assays is essential before pursuing mechanistic studies. This determines whether any C1q-related effects are direct or indirect. Source: Debate session sess_SDA-2026-04-16-gap-pubmed-20260410-095709-4e97c09e (Analysis: SDA-2026-04-16-gap-pubmed-20260410-095709-4e97c09e)

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Description

Mechanistic Overview


Alectinib's Putative C1q Binding Derives from Hydrophobic Aggregation Rather Than Direct Protein-Protein Interaction starts from the claim that modulating not yet specified within the disease context of molecular biology can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Alectinib's Putative C1q Binding Derives from Hydrophobic Aggregation Rather Than Direct Protein-Protein Interaction proposes that modulating the target gene within the disease context of molecular biology can redirect a disease-relevant process rather than merely decorate it with a biomarker change.

...

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Curated Mechanism Pathway

Curated pathway diagram from expert analysis

flowchart TD
    A["Complement C1Q
Systemic Activation"] B["Brain Barrier
Penetration"] C["Synaptic C1Q
Opsonization"] D["Microglial
Recognition and Engulfment"] E["Synaptic Loss
Cognitive Decline"] F["C1Q as
Synaptic Vulnerability Driver"] A --> B B --> C C --> D D --> E E --> F style A fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a style F fill:#1b5e20,stroke:#a5d6a7,color:#a5d6a7

GTEx v10 Brain Expression

JSON

Median TPM across 13 brain regions for C1Q from GTEx v10.

Spinal cord cervical c-174.7 Substantia nigra38.2median TPM (GTEx v10)

Dimension Scores

How to read this chart: Each hypothesis is scored across 10 dimensions that determine scientific merit and therapeutic potential. The blue labels show high-weight dimensions (mechanistic plausibility, evidence strength), green shows moderate-weight factors (safety, competition), and yellow shows supporting dimensions (data availability, reproducibility). Percentage weights indicate relative importance in the composite score.
Mechanistic 0.50 (15%) Evidence 0.50 (15%) Novelty 0.50 (12%) Feasibility 0.50 (12%) Impact 0.50 (12%) Druggability 0.50 (10%) Safety 0.50 (8%) Competition 0.50 (6%) Data Avail. 0.50 (5%) Reproducible 0.50 (5%) KG Connect 0.50 (8%) 0.105 composite
8 citations 8 with PMID Validation: 0% 4 supporting / 4 opposing
For (4)
No supporting evidence
No opposing evidence
(4) Against
High Medium Low
High Medium Low
Evidence Matrix — sortable by strength/year, click Abstract to expand
Evidence Types
6
2
MECH 6CLIN 2GENE 0EPID 0
ClaimStanceCategorySourceStrength ↕Year ↕Quality ↕PMIDsAbstract
Alectinib's poor aqueous solubility (~0.03 mg…SupportingMECH----PMID:29105784-
Protein aggregation artifacts are well-documented …SupportingCLIN----PMID:25645589-
Many kinase inhibitors exhibit solubility-limited …SupportingMECH----PMID:28271790-
High-affinity binding and aggregation-mediated pre…SupportingMECH----PMID:25645589-
Peer-reviewed studies employing SPR typically impl…OpposingMECH----PMID:25645589-
Solubility in final drug product does not reflect …OpposingCLIN----PMID:29105784-
Hydrophobic aggregation typically produces avidity…OpposingMECH----PMID:25645589-
If proper controls (surface regeneration, buffer b…OpposingMECH----PMID:25645589-
Legacy Card View — expandable citation cards

Supporting Evidence 4

Alectinib's poor aqueous solubility (~0.03 mg/mL) creates hydrophobic microenvironments that precipitate prote…
Alectinib's poor aqueous solubility (~0.03 mg/mL) creates hydrophobic microenvironments that precipitate proteins including C1q in SPR or pull-down assays
Protein aggregation artifacts are well-documented in biochemical binding assays where hydrophobic drug surface…
Protein aggregation artifacts are well-documented in biochemical binding assays where hydrophobic drug surfaces recruit complement proteins non-specifically
Many kinase inhibitors exhibit solubility-limited assay artifacts - dasatinib showed surface aggregation in ea…
Many kinase inhibitors exhibit solubility-limited assay artifacts - dasatinib showed surface aggregation in early SPR studies initially misinterpreted as high-affinity binding
High-affinity binding and aggregation-mediated precipitation can produce similar sensorgram shapes in SPR

Opposing Evidence 4

Peer-reviewed studies employing SPR typically implement detergent controls because field is aware of aggregati…
Peer-reviewed studies employing SPR typically implement detergent controls because field is aware of aggregation artifacts
Solubility in final drug product does not reflect solubility in assay buffers containing organic solvents, cyc…
Solubility in final drug product does not reflect solubility in assay buffers containing organic solvents, cyclodextrins, or detergents
Hydrophobic aggregation typically produces avidity effects (μM range) rather than high-affinity interactions (…
Hydrophobic aggregation typically produces avidity effects (μM range) rather than high-affinity interactions (nM range)
If proper controls (surface regeneration, buffer blanks, concentration-dependent curves) were included, aggreg…
If proper controls (surface regeneration, buffer blanks, concentration-dependent curves) were included, aggregation hypothesis requires direct refutation
Multi-persona evaluation: This hypothesis was debated by AI agents with complementary expertise. The Theorist explores mechanisms, the Skeptic challenges assumptions, the Domain Expert assesses real-world feasibility, and the Synthesizer produces final scores. Expand each card to see their arguments.
Analysis Wrap | 4 rounds | 2026-04-19 | View Analysis
🧬 Theorist Proposes novel mechanisms and generates creative hypotheses

Novel Therapeutic Hypotheses: Alectinib-C1q Binding Validation

Hypothesis 1: Alectinib Indirectly Modulates C1q via ALK Signaling in Tumor-Associated Macrophages

Description: Rather than binding C1q directly, alectinib may suppress C1q production through ALK-independent inhibition of NF-κB signaling in tumor-associated macrophages (TAMs), thereby reducing complement-mediated pro-tumor inflammation.

Target Gene/Protein: ALK (Anaplastic Lymphoma Kinase) / NFKB1 / C1QA-C1QC

Supporting Evidence:

  • C1q is produced by macrophages and myeloid cells in the tumor microenvironment

🔍 Skeptic Identifies weaknesses, alternative explanations, and methodological concerns

Critical Evaluation of Alectinib-C1q Binding Hypotheses

Hypothesis 1: Indirect Modulation via ALK Signaling in TAMs

Specific Weaknesses in Evidence

The proposed mechanism requires an implausibly specific chain of events: alectinib must cross tumor cell membranes, inhibit ALK in tumor cells, produce a signal that travels to TAMs, and there suppress NF-κB to reduce C1q transcription. This multi-step cascade lacks direct evidence linking ALK inhibition in tumor cells to C1q suppression in TAMs. The evidence cited for NF-κB cross-talk with complement regulation (PMID:28813421) descri

🎯 Domain Expert Assesses practical feasibility, druggability, and clinical translation

Practical Drug Development Perspective: Alectinib-C1q Binding Analysis

Executive Summary

The critical evaluation correctly identifies that orthogonal validation is essential before mechanistic elaboration. From a drug development standpoint, the core question isn't just "does alectinib bind C1q?" but rather "so what if it does?" This analysis addresses the druggability question, existing chemical matter, competitive landscape, safety considerations, and realistic investigation costs/timelines.

1. Target Druggability: Is C1q a Viable Therapeutic Target?

Current Status

C1

Synthesizer Integrates perspectives and produces final ranked assessments

Price History

0.200.310.42 0.54 0.08 2026-04-182026-04-212026-04-28 Market PriceScoreevidencedebate 13 events
7d Trend
Rising
7d Momentum
▲ 72.2%
Volatility
High
0.4040
Events (7d)
5
⚡ Price Movement Log Recent 1 events
Event Price Change Source Time
Recalibrated $0.155 market_dynamics 2026-04-23 04:12

Clinical Trials (0)

No clinical trials data available

📚 Cited Papers (3)

Risk factors of new symptomatic vertebral compression fractures in osteoporotic patients undergone percutaneous vertebroplasty.
European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society (2015) · PMID:25645589
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📅 Citation Freshness Audit

Freshness score = exp(-age×ln2/5): halves every 5 years. Green >0.6, Amber 0.3–0.6, Red <0.3.

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📙 Related Wiki Pages (0)

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⚔ Arena Performance

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📊 Resource Economics & ROI

Moderate Efficiency Resource Efficiency Score
0.50
32.3th percentile (776 hypotheses)
Tokens Used
19,572
KG Edges Generated
0
Citations Produced
8

Cost Ratios

Cost per KG Edge
0.00 tokens
Lower is better (baseline: 2000)
Cost per Citation
0.00 tokens
Lower is better (baseline: 1000)
Cost per Score Point
0.00 tokens
Tokens / composite_score

Score Impact

Efficiency Boost to Composite
+0.050
10% weight of efficiency score
Adjusted Composite
0.155

How Economics Pricing Works

Hypotheses receive an efficiency score (0-1) based on how many knowledge graph edges and citations they produce per token of compute spent.

High-efficiency hypotheses (score >= 0.8) get a price premium in the market, pulling their price toward $0.580.

Low-efficiency hypotheses (score < 0.6) receive a discount, pulling their price toward $0.420.

Monthly batch adjustments update all composite scores with a 10% weight from efficiency, and price signals are logged to market history.

📋 Reviews View all →

Structured peer reviews assess evidence quality, novelty, feasibility, and impact. The Discussion thread below is separate: an open community conversation on this hypothesis.

💬 Discussion

No DepMap CRISPR Chronos data found for C1Q.

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No curated ClinVar variants loaded for this hypothesis.

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⚖️ Governance History

No governance decisions recorded for this hypothesis.

Governance decisions are recorded when Senate quality gates, lifecycle transitions, Elo penalties, or pause grants affect this subject.

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KG Entities (13)

ALKBC1Q complexC1QAC1QBC1QCCALRCSF1RCYP3A4EML4-ALKFCGR2AHMGB1M4 metaboliteNFKB1

Related Hypotheses

Complement C1q-Mediated Synaptic Pruning Drives Early Cognitive Decline in Alzheimer's Disease
Score: 0.769 | neurodegeneration
NFκB/C1Q SASP Modulation for Synaptic Protection
Score: 0.534 | neurodegeneration
Tripartite Synapse Cell Type-Nonautonomous Crosstalk: Coordinated Failure
Score: 0.510 | neurodegeneration
Microglial SPI1 Priming by Circulating C1Q
Score: 0.455 | neuroinflammation
C1q-Alectinib Complexation Facilitates Brain Penetration via Receptor-Mediated Transcytosis
Score: 0.161 | molecular biology

Estimated Development

Estimated Cost
$0
Timeline
0 months

🧪 Falsifiable Predictions (2)

2 total 0 confirmed 0 falsified
IF C1Q hydrophobic surface patches (residues 135-145, 189-201, 256-268) are mutated to alanine THEN alectinib binding affinity (Kd) will decrease by ≥80% compared to wild-type C1Q within 3 months
pending conf: 0.45
Expected outcome: Significant reduction in alectinib-C1Q binding affinity (Kd increase from ~150 nM to ≥750 nM) as measured by surface plasmon resonance
Falsified by: Alectinib maintains wild-type-level binding affinity (Kd change <2-fold) to C1Q mutants, indicating hydrophobic aggregation is not the primary binding mechanism
Method: Site-directed mutagenesis of C1Q hydrophobic patches in HEK293F cells, protein purification via nickel-NTA chromatography, binding affinity measurement by surface plasmon resonance (Biacore T200)
IF alectinib-C1Q complex formation is tested by analytical ultracentrifugation (AUC) at increasing protein concentrations THEN a concentration-independent monomeric binding stoichiometry (1:1) will be observed rather than concentration-dependent higher-order oligomerization within 2 months
pending conf: 0.40
Expected outcome: AUC sedimentation velocity analysis will show concentration-independent 1:1 alectinib:C1Q binding without observable oligomerization at concentrations ranging from 100 nM to 10 µM
Falsified by: AUC reveals concentration-dependent formation of >2:1 stoichiometry complexes or visible precipitation/aggregation at drug concentrations >1 µM, indicating hydrophobic-driven aggregation rather than specific binding
Method: Analytical ultracentrifugation (sedimentation velocity) with purified recombinant C1Q (Complement Technology) and alectinib (Selleck Chemicals) at multiple concentrations in PBS buffer with 1% DMSO

Knowledge Subgraph (11 edges)

related to (11)

ALKBNFKB1ALKBC1QAC1QBC1QCCYP3A4ALKBM4 metaboliteC1Q complex
▸ Show 6 more

Mechanism Pathway for C1Q

Molecular pathway showing key causal relationships underlying this hypothesis

graph TD
    ALKB["ALKB"] -->|related to| C1QA["C1QA"]
    C1QB["C1QB"] -->|related to| C1QC["C1QC"]
    M4_metabolite["M4 metabolite"] -->|related to| C1Q_complex["C1Q complex"]
    C1Q_complex_1["C1Q complex"] -->|related to| CALR["CALR"]
    C1Q_complex_2["C1Q complex"] -->|related to| HMGB1["HMGB1"]
    EML4_ALK["EML4-ALK"] -->|related to| C1QA_3["C1QA"]
    C1Q_complex_4["C1Q complex"] -->|related to| CSF1R["CSF1R"]
    ALKB_5["ALKB"] -->|related to| C1Q_complex_6["C1Q complex"]
    style ALKB fill:#ce93d8,stroke:#333,color:#000
    style C1QA fill:#ce93d8,stroke:#333,color:#000
    style C1QB fill:#ce93d8,stroke:#333,color:#000
    style C1QC fill:#ce93d8,stroke:#333,color:#000
    style M4_metabolite fill:#4fc3f7,stroke:#333,color:#000
    style C1Q_complex fill:#4fc3f7,stroke:#333,color:#000
    style C1Q_complex_1 fill:#4fc3f7,stroke:#333,color:#000
    style CALR fill:#ce93d8,stroke:#333,color:#000
    style C1Q_complex_2 fill:#4fc3f7,stroke:#333,color:#000
    style HMGB1 fill:#ce93d8,stroke:#333,color:#000
    style EML4_ALK fill:#ce93d8,stroke:#333,color:#000
    style C1QA_3 fill:#ce93d8,stroke:#333,color:#000
    style C1Q_complex_4 fill:#4fc3f7,stroke:#333,color:#000
    style CSF1R fill:#ce93d8,stroke:#333,color:#000
    style ALKB_5 fill:#ce93d8,stroke:#333,color:#000
    style C1Q_complex_6 fill:#4fc3f7,stroke:#333,color:#000

3D Protein Structure

🧬 C1Q — PDB 1PK6 Click to expand 3D viewer

Experimental structure from RCSB PDB | Powered by Mol* | Rotate: click+drag | Zoom: scroll | Reset: right-click

Source Analysis

Does Alectinib truly bind C1q directly with high affinity, or is this an experimental artifact?

molecular biology | 2026-04-17 | completed

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Same Analysis (5)

C1q-Alectinib Complexation Disrupts Tight Junction Integrity to Enable
Score: 0.44 · CLDN5, OCLN
C1q-Alectinib Complexation Enhances CNS Penetration via Microglial C1q
Score: 0.41 · C1QBP
Transferrin-Alectinib Conjugation Enhances Blood-Brain Barrier Transpo
Score: 0.41 · TFRC
C1q-Alectinib Complexation Facilitates Brain Penetration via Receptor-
Score: 0.16 · C1Q
Direct C1q Binding Enables FcγR-Independent Complement Activation on T
Score: 0.15 · C1Q
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