Dopaminergic neurons with lysosomal stress (either from GBA1 mutations, VPS35 dysfunction, or age-related LAMP2A decline) release exosomes enriched in SNCA via a mechanism involving CD63 and syntenin-mediated exosome biogenesis at multivesicular bodies (MVBs). Critically, these exosomes carry a distinct cargo signature reflecting their lysosomal origin: they are enriched in mature cathepsins (particularly cathepsin D in its active form), LAMP1 fragments, and glucosylceramide. When these exosomes
The ESCRT machinery (particularly CHMP2B, TSG101, and ALIX) normally mediates budding of intraluminal vesicles into MVBs and resealing of damaged lysosomal membranes. In PD, phosphorylated SNCA (at Ser129) acts as a pathological ligand that recruits ESCRT-III components to lysosomal membranes via a novel phospho-dependent interaction with CHMP2B. Normally, LAMP2A coordinates this process by recruiting TSG101; however, in PD, hyperphosphorylated SNCA outcompetes LAMP2A for TSG101 binding. This re
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.
SNCACell Non AutonomousProtein Aggregationneurodegeneration
Convergent signals
SNCA recurs across 2 selected hypotheses with aligned directionality in cell non autonomous, protein aggregation.
Divergent signals
No direct polarity conflicts detected among the selected hypotheses.
Verdict Summary
3/11
dimensions won
Exosomal SNCA Propagation from Lysosome-
5/11
dimensions won
SNCA Aggregation Hijacks the Endosomal S
Radar Chart — 10 Dimensions
Score Comparison Bars
Mechanistic
0.78
0.75
Evidence
0.70
0.72
Novelty
0.85
0.78
Feasibility
0.00
0.80
Impact
0.00
0.76
Druggability
0.00
0.00
Safety
0.00
0.00
Competition
0.00
0.00
Data
0.00
0.00
Reproducible
0.00
0.50
KG Connect
0.50
0.50
Score Breakdown
Dimension
Exosomal SNCA Propagation from
SNCA Aggregation Hijacks the E
Mechanistic
0.780
0.750
Evidence
0.700
0.720
Novelty
0.850
0.780
Feasibility
0.000
0.800
Impact
0.000
0.760
Druggability
0.000
0.000
Safety
0.000
0.000
Competition
0.000
0.000
Data
0.000
0.000
Reproducible
0.000
0.500
KG Connect
0.500
0.500
Evidence
Exosomal SNCA Propagation from Lysosome-Compromised Neurons
No evidence citations yet
SNCA Aggregation Hijacks the Endosomal Sorting Complex Requi