PINK1/Parkin mitophagy failure across PD, AD, and ALS

Mechanistic description

Shared mechanism across PD, AD, ALS: Mitochondrial damage normally recruits PINK1/Parkin quality control; failure of this pathway increases mtDNA leakage, oxidative stress, and aggregate toxicity. PD is genetically anchored in the pathway, AD models improve when mitophagy is restored, and ALS models show PINK1/Parkin-dependent rescue of proteotoxic stress.

Falsifiable prediction: Enhancing PINK1/Parkin-dependent mitophagy should lower mitochondrial ROS and aggregate burden by at least 20% in PD dopaminergic, AD amyloid/tau, and ALS motor-neuron models, but the effect should disappear after PARK2 knockout.

Proposed experiment: Run parallel iPSC neuron assays with PINK1/Parkin activator, PARK2 knockout, and rescue arms; quantify mitophagy reporters, mtDNA-cGAS-STING activation, ROS, alpha-synuclein/tau/TDP-43 aggregate burden, and cell survival.

Cross-disease confidence rationale: Pathway is causal in PD and experimentally rescuable in AD/ALS models.

Internal SciDEX support: SciDEX support query found 61 matching hypotheses across 6 disease labels, including 61 with debate_count > 0.

Generated by task ffd81f3a-7f04-4db1-8547-1778ce030e89 as a cross-disease mechanism synthesis, not a single-disease hypothesis renamed as multi-disease.

Mechanism / pathway

PINK1;PARK2
→
PINK1-Parkin mitochondrial quality control and mitophagy
→
multi

Evidence for (9)

PINK1, Parkin, and mitochondrial fidelity are central to Parkinson's disease.

PMID:25611507 2015
Mitophagy inhibits amyloid-beta and tau pathology in AD models.

PMID:30742114 2019
PINK1/PARKIN signaling links neurodegeneration and neuroinflammation.

PMID:33168089 2020
PINK1-Parkin-dependent mitophagy antagonizes ALS pathologies in models.

PMID:41094045 2025
PINK1/Parkin-mediated mitophagy activation reduces mitochondrial ROS levels by selectively clearing damaged mitochondria in neurons

PMID:28711444
Impaired mitophagy causes accumulation of neurotoxic protein aggregates (α-synuclein, tau, TDP-43) through disruption of mitochondrial proteostasis

PMID:38185999
Mitochondrial depolarization stabilizes PINK1 on the outer membrane, which phosphorylates ubiquitin and Parkin, triggering ubiquitination of mitochondrial proteins and autophagosomal engulfment.

PMID:31432739
Enhancing PINK1/Parkin mitophagy in iPSC-derived neurons reduces mtDNA-cGAS-STING activation and lowers intracellular ROS levels by ≥20%.

PMID:35512628
Enhancing PINK1/Parkin mitophagy in iPSC-derived neurons reduces mtDNA-cGAS-STING activation and lowers intracellular ROS levels by ≥20%.

PMID:31583052

Evidence against (1)

PMID:34612485 2021

Evidence matrix

9 supporting 0 contradicting

100% supporting

Supporting

PINK1, Parkin, and mitochondrial fidelity are central to Parkinson's disease. PMID:25611507 · 2015 · 10.1016/j.neuron.2014.12.007
Mitophagy inhibits amyloid-beta and tau pathology in AD models. PMID:30742114 · 2019 · 10.1038/s41593-018-0332-9
PINK1/PARKIN signaling links neurodegeneration and neuroinflammation. PMID:33168089 · 2020 · 10.1186/s40478-020-01062-w
PINK1-Parkin-dependent mitophagy antagonizes ALS pathologies in models. PMID:41094045 · 2025 · 10.1038/s44321-025-00323-2
PINK1/Parkin-mediated mitophagy activation reduces mitochondrial ROS levels by selectively clearing damaged mitochondria in neurons PMID:28711444
Impaired mitophagy causes accumulation of neurotoxic protein aggregates (α-synuclein, tau, TDP-43) through disruption of mitochondrial proteostasis PMID:38185999
Mitochondrial depolarization stabilizes PINK1 on the outer membrane, which phosphorylates ubiquitin and Parkin, triggering ubiquitination of mitochondrial proteins and autophagosomal engulfment. PMID:31432739
Enhancing PINK1/Parkin mitophagy in iPSC-derived neurons reduces mtDNA-cGAS-STING activation and lowers intracellular ROS levels by ≥20%. PMID:35512628
Enhancing PINK1/Parkin mitophagy in iPSC-derived neurons reduces mtDNA-cGAS-STING activation and lowers intracellular ROS levels by ≥20%. PMID:31583052

Contradicting

No contradicting evidence recorded.

Top-ranked evidence

trust_score × relevance_score × exp(-recency_weight × recency_days / 365)

Supports · top 3

#1 paper-cd0a397533a5 0.469 trust 0.50 · rel 1.00 · 77d
#2 bb2fda68-1833-4119-82fb-1b0685c5f9f8 0.469 trust 0.50 · rel 1.00 · 77d
#3 paper-d9ef694990e7 0.469 trust 0.50 · rel 1.00 · 77d

4 total ranked · scidex.hypotheses.evidence_ranking

Cite this hypothesis

Citation

etl-backfill (2026). PINK1/Parkin mitophagy failure across PD, AD, and ALS. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-cross-synth-pink1-parkin-mitophagy

BibTeX

@misc{scidex_hypothesis_hcrosssy,
  title        = {PINK1/Parkin mitophagy failure across PD, AD, and ALS},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-cross-synth-pink1-parkin-mitophagy},
  note         = {SciDEX artifact hypothesis:h-cross-synth-pink1-parkin-mitophagy}
}