Healthy astrocytes provide a balanced fuel/redox/pH composition (including lactate, glucose, pyruvate, and NAD+/NADH-related metabolites) via the astrocyte-neuron lactate shuttle that supports ATP-dependent chaperone activity and prevents energy failure-induced RBP mislocalization. Hypoxic/VCP-mutant astrocytes undergo HIF-1α-driven metabolic reprogramming and mitochondrial dysfunction that disrupts this overall composition rather than a single factor. The defect is likely the aggregate metabolic milieu, not absolute lactate deficiency alone. This hypothesis best aligns with the source paper's observed HIF-1α activation, mitochondrial depolarization, and lipid droplet accumulation as upstream drivers.
Curated pathway from expert analysis
flowchart TD
A["HIF1A; SLC16A2 (MCT2); LDHA<br/>Primary Target"]
B["Biological Process 1<br/>Mechanistic Step A"]
C["Biological Process 2<br/>Mechanistic Step B"]
D["Output Phenotype<br/>Disease Effect"]
A --> B
B --> C
C --> D
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style D fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9aNo linked papers recorded for this hypothesis yet.
No curated PDB or AlphaFold mapping for HIF1A; yet. Search RCSB →
Median TPM across 13 brain regions for HIF1A; SLC16A2 (MCT2); LDHA from GTEx v10.
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 HIF1A; SLC16A2 (MCT2); LDHA.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF we pharmacologically inhibit HIF1A activity in VCP-mutant astrocytes (using 10 μM PX-478 for 24 hours) THEN the aggregate metabolic composition of the astrocyte secretome (measured via LC-MS-based | Significant reversal of metabolic dysregulation (≥50% reduction in lipid droplet-associated metabolites, restoration of lactate/pyruvate ratio to within 10% of | — no observation — | pending | 0.60 |
| IF we supplement astrocyte-neuron co-cultures with a combinatorial mixture of lactate (10 mM), glucose (5 mM), pyruvate (2 mM), and nicotinamide (1 mM) to recreate a balanced fuel/redox/pH composition | Combinatorial supplementation will yield ≥40% improvement in neuronal HSP70 activity and ≥35% correction of RBP mislocalization, outperforming each single-metab | — no observation — | pending | 0.55 |