ID: h-e59df37bd0
Hypothesis
PARP1-NAD+-AIF bioenergetic collapse drives a self-amplifying parthanatos loop
Oxidative DNA damage hyperactivates PARP1, rapidly consuming NAD+ and collapsing ATP production.
EvidencePending (0%)📖 8 cit🗣 1 debates✓ 8 support✗ 2 oppose
✓ All Quality Gates Passed
🧪 Overview
Oxidative DNA damage hyperactivates PARP1, rapidly consuming NAD+ and collapsing ATP production. Bioenergetic failure impairs mitochondrial respiration, increases ROS, promotes PAR polymer signaling and AIFM1 translocation, and thereby feeds additional oxidative damage back into the system. This is the clearest closed feedback loop linking ROS, organelle failure, and executioner death signaling.
🧬 Mechanism
🧬 Curated Mechanism Pathway
Curated pathway from expert analysis
flowchart TD
A["PARP1; AIFM1; NAMPT; NMNAT1/2/3<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:#ef9a9a⚖️ Evidence
⚖️ Evidence Matrix8 supports2 contradicts
Supports
PARP1 is hyperactivated in PD brain and toxin models, consistent with a DNA damage to NAD+ depletion loop.
Supports
NAD+ levels decline with age and in PD, supporting vulnerability to PARP-driven energetic collapse.
Supports
NMN improves mitochondrial function in neurodegeneration-related settings, supporting tractability of NAD+ restoration.
Supports
PHB2 (prohibitin 2) promotes PINK1-PRKN/Parkin-dependent mitophagy by the PARL-PGAM5-PINK1 axis.
Supports
Identification and validation of a prognostic signature of drug resistance and mitochondrial energy metabolism-related differentially expressed genes for breast cancer.
Supports
The KEAP1/PGAM5/AIFM1-Mediated oxeiptosis pathway in Alzheimer's disease.
Supports
Cannabidiol inhibits human glioma by induction of lethal mitophagy through activating TRPV4.
Supports
Interaction with AK2A links AIFM1 to cellular energy metabolism.
Contradicts
Benefit from NAD+ precursors may reflect general mitochondrial support rather than direct suppression of PARP-AIF loop dominance.
Contradicts
The source paper emphasizes multiple parallel death pathways, arguing against any single universal mechanism.
📖 Linked Papers
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — PARP1;
No curated PDB or AlphaFold mapping for PARP1; yet. Search RCSB →
🧠 GTEx v10 Brain ExpressionJSON
Median TPM across 13 brain regions for PARP1; AIFM1; NAMPT; NMNAT1/2/3 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 PARP1; AIFM1; NAMPT; NMNAT1.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
💰 Estimated Development
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🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF PARP1 is genetically deleted via CRISPR/Cas9 in neurons, THEN oxidative stress-induced bioenergetic collapse (NAD+ depletion, ATP loss, ROS elevation) and subsequent cell death will be abolished wi | NAD+ will remain >80% of baseline, ATP >70%, mitochondrial ROS (MitoSOX) will not increase above baseline, and cell viability will be >75% (vs. <30% in PARP1-WT | — no observation — | pending | 0.68 |
| IF neurons are supplemented with nicotinamide riboside or NMN before oxidative DNA damage, THEN intracellular NAD+ depletion and AIFM1 nuclear translocation will be attenuated within 24 hours, with im | NAD+ levels remain above 70% of baseline, ATP stays above 50% of control, PAR polymer accumulation falls by more than 40%, and AIFM1 nuclear translocation is re | — no observation — | pending | 0.72 |
🔮 Falsifiable Predictions (2)
pendingconf 72%
IF neurons are supplemented with nicotinamide riboside or NMN before oxidative DNA damage, THEN intracellular NAD+ depletion and AIFM1 nuclear translocation will be attenuated within 24 hours, with improved neuronal viability versus vehicle-treated controls.
Predicted outcome: NAD+ levels remain above 70% of baseline, ATP stays above 50% of control, PAR polymer accumulation falls by more than 40%, and AIFM1 nuclear transloca
Falsification: If NAD+ precursor supplementation fails to preserve NAD+ or prevent AIFM1 nuclear translocation despite adequate intracellular uptake, then NAD+ depletion is not the rate-limiting trigger for the prop
pendingconf 68%
IF PARP1 is genetically deleted via CRISPR/Cas9 in neurons, THEN oxidative stress-induced bioenergetic collapse (NAD+ depletion, ATP loss, ROS elevation) and subsequent cell death will be abolished within 48 hours.
Predicted outcome: NAD+ will remain >80% of baseline, ATP >70%, mitochondrial ROS (MitoSOX) will not increase above baseline, and cell viability will be >75% (vs. <30% i
Falsification: NAD+ depletion, ATP collapse, and cell death still occur despite PARP1 deletion; this would indicate an alternative PARP1-independent driver of bioenergetic failure in the loop.
▸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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