**Molecular Mechanism and Rationale**
Astrocytic release of soluble complement regulators CD55 and CD46, rather than membrane-bound expression, represents a dynamic mechanism for spatiotemporal control of complement-mediated synaptic pruning. Astrocytes constitutively express high levels of CD55 and CD46, which undergo metalloproteinase-mediated shedding via ADAM10 and ADAM17 cleavage at defined juxtamembrane sites, generating soluble forms (sCD55, sCD46) that retain full complement regulatory
**Molecular Mechanism and Rationale**
The differential expression of complement regulators CD55 (decay-accelerating factor, DAF) and CD46 (membrane cofactor protein, MCP) on synaptic membranes represents a sophisticated molecular mechanism for spatial regulation of complement-mediated synaptic pruning. CD55 functions as a membrane-bound glycoprotein that accelerates the decay of both classical and alternative pathway C3 and C5 convertases (C4b2a, C3bBb, and C3b2Bb) by dissociating the enzymatic
Convergent vs Divergent Predictions
This summary checks where the selected hypotheses point toward the same target or mechanism, and where they pull in opposite directions.
CD46 (MCP) recurs across 2 selected hypotheses with aligned directionality in biomarker, unspecified mechanism.
CD55 (DAF) recurs across 2 selected hypotheses with aligned directionality in biomarker, unspecified mechanism.
Divergent signals
No direct polarity conflicts detected among the selected hypotheses.
Verdict Summary
7/11
dimensions won
Astrocytic Complement Regulator Release
11/11
dimensions won
Differential Complement Regulator Expres
Radar Chart — 10 Dimensions
Score Comparison Bars
Mechanistic
0.75
0.75
Evidence
0.33
0.72
Novelty
0.00
0.75
Feasibility
0.00
0.70
Impact
0.00
0.80
Druggability
0.70
0.70
Safety
0.50
0.50
Competition
0.80
0.80
Data
0.55
0.55
Reproducible
0.72
0.72
KG Connect
0.50
0.50
Score Breakdown
Dimension
Astrocytic Complement Regulato
Differential Complement Regula
Mechanistic
0.750
0.750
Evidence
0.325
0.720
Novelty
0.000
0.750
Feasibility
0.000
0.700
Impact
0.000
0.800
Druggability
0.700
0.700
Safety
0.500
0.500
Competition
0.800
0.800
Data
0.550
0.550
Reproducible
0.720
0.720
KG Connect
0.500
0.500
Evidence
Astrocytic Complement Regulator Release Modulates Synaptic V
No evidence citations yet
Differential Complement Regulator Expression on Synaptic Mem
No evidence citations yet
Debate Excerpts
Astrocytic Complement Regulator Release Modulates
4 rounds · quality: 0.75
Theorist
# Therapeutic Hypotheses: Selectivity of Complement-Mediated Synaptic Elimination During Prolonged Anesthesia
---
## Hypothesis 1: Activity-Dependent Synaptic Tagging via CREB-BDNF TrkB Signaling
*...
Skeptic
# Critical Evaluation of Hypotheses for Complement-Mediated Synaptic Selectivity
## Overview
These hypotheses address a legitimate gap in understanding how C1q distinguishes between synapses for eli...
Domain Expert
# Feasibility Assessment: Selectivity Mechanisms in Anesthesia-Induced Synaptic Elimination
## Executive Summary
The central question—whether specific synapses become targets for complement-mediated...
Synthesizer
{
"ranked_hypotheses": [
{
"title": "Differential Complement Regulator Expression on Synaptic Membranes (CD55/CD46)",
"description": "Excitatory synapses on specific neuronal compart...
Differential Complement Regulator Expression on Sy
4 rounds · quality: 0.75
Theorist
# Therapeutic Hypotheses: Selectivity of Complement-Mediated Synaptic Elimination During Prolonged Anesthesia
---
## Hypothesis 1: Activity-Dependent Synaptic Tagging via CREB-BDNF TrkB Signaling
*...
Skeptic
# Critical Evaluation of Hypotheses for Complement-Mediated Synaptic Selectivity
## Overview
These hypotheses address a legitimate gap in understanding how C1q distinguishes between synapses for eli...
Domain Expert
# Feasibility Assessment: Selectivity Mechanisms in Anesthesia-Induced Synaptic Elimination
## Executive Summary
The central question—whether specific synapses become targets for complement-mediated...
Synthesizer
{
"ranked_hypotheses": [
{
"title": "Differential Complement Regulator Expression on Synaptic Membranes (CD55/CD46)",
"description": "Excitatory synapses on specific neuronal compart...