ID: h-765d457dc3
Hypothesis
Autophagy Activation ULK1/VPS34 (H3): Lipid Routing to Lysosomes
Constitutive ULK1 activation via AAV-hSyn-ULK1(S317A) enhances lipophagy to sequester excess neuronal lipids into lysosomes for degradation.
EvidencePending (0%)📖 0 cit🗣 1 debates✓ 3 support✗ 3 oppose
✓ All Quality Gates Passed
🧪 Overview
Constitutive ULK1 activation via AAV-hSyn-ULK1(S317A) enhances lipophagy to sequester excess neuronal lipids into lysosomes for degradation. Addresses the metabolic routing defect underlying lipid droplet accumulation and unconventional secretion. Mechanistically compelling but construct validation and lipophagy specificity remain concerns.
🧬 Mechanism
🧬 Curated Mechanism Pathway
Curated pathway from expert analysis
flowchart TD
A["mTORC1 Off / AMPK On<br/>Energy/Nutrient Deficit"]
B["ULK1-ATG13-FIP200<br/>Initiation Complex Assembly"]
C["ULK1 Autophosphorylation<br/>Ser317/Ser777 by AMPK"]
D["VPS34/BECN1 PI3K<br/>PI3P Generation on ER"]
E["DFCP1/WIPI2 Recruitment<br/>Omegasome Formation"]
F["ATG12-ATG5-ATG16L1<br/>LC3-II Lipidation"]
G["Autophagosome Maturation<br/>Cargo Capture and Fusion"]
A --> B
B --> C
C --> D
D --> E
E --> F
F --> G
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style G fill:#1b5e20,stroke:#81c784,color:#81c784⚖️ Evidence
⚖️ Evidence Matrix3 supports3 contradicts
Contradicts
S317A mutation may disrupt regulation without creating true constitutive activation; construct validation required
Contradicts
Neuronal lipophagy is mechanistically understudied relative to hepatocyte systems
Contradicts
VPS34 is critical for synaptic vesicle trafficking; activation may dysregulate neurotransmitter release
📖 Linked Papers
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — ULK1
🧠 GTEx v10 Brain ExpressionJSON
Median TPM across 13 brain regions for ULK1 (autophagy initiation kinase) from 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.
No DepMap CRISPR Chronos data found for ULK1 (autophagy initiation kinase).
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
💰 Estimated Development
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Timeline
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📊 Market Indicators
7d Trend
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Stable
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Volatility
Low
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Events (7d)
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LLM Tokens
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🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF AAV-hSyn-ULK1(S317A) is expressed in primary cortical neurons derived from N171-82Q mice, THEN lysosomal fraction cholesteryl ester and ceramide content will increase by at least 35% while total ce | Increased lipid routing to lysosomes (elevated lysosomal cholesteryl esters/ceramides) with concurrent reduction in cytosolic lipid droplets | — no observation — | pending | 0.45 |
| IF AAV-hSyn-ULK1(S317A) (constitutive ULK1 activation) is stereotaxically injected into the striatum of 8-week-old N171-82Q Huntington disease mice (model of neuronal lipid droplet accumulation), THEN | Significant reduction in neuronal lipid droplet burden with ULK1(S317A) expression | — no observation — | pending | 0.55 |
🔮 Falsifiable Predictions (2)
pendingconf 55%
IF AAV-hSyn-ULK1(S317A) (constitutive ULK1 activation) is stereotaxically injected into the striatum of 8-week-old N171-82Q Huntington disease mice (model of neuronal lipid droplet accumulation), THEN lipid droplet number and size in striatal neurons will decrease by at least 50% at 8 weeks post-inj
Predicted outcome: Significant reduction in neuronal lipid droplet burden with ULK1(S317A) expression
Falsification: No significant difference (p > 0.05) in lipid droplet count or mean area between ULK1(S317A) and eYFP control groups, or increased lipid droplet accumulation in the treatment group
pendingconf 45%
IF AAV-hSyn-ULK1(S317A) is expressed in primary cortical neurons derived from N171-82Q mice, THEN lysosomal fraction cholesteryl ester and ceramide content will increase by at least 35% while total cellular lipid droplet area decreases by at least 40% within 72 hours, measured by LXRB-LysoSensor col
Predicted outcome: Increased lipid routing to lysosomes (elevated lysosomal cholesteryl esters/ceramides) with concurrent reduction in cytosolic lipid droplets
Falsification: No increase in lysosomal lipid species despite ULK1 activation, OR total cellular lipids unchanged/increased, indicating lipids are not being routed through the autophagy-lysosome pathway
▸Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesizer
| source | v1_phase_c_backfill |
| origin_type | debate_synthesizer |
| _schema_version | 1 |
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting
0 contradicting
0 neutral
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