GPX4 reserve failure gates selective ALS motor-neuron ferroptosis

Mechanistic description

ALS-linked proteostasis stress lowers effective GPX4 reserve in vulnerable motor neurons, allowing oxidized phospholipids to cross a ferroptotic death threshold. Restoring GPX4 activity or glutathione availability should rescue motor-neuron survival more strongly than generic antioxidants.

Mechanism / pathway

GPX4
→
ferroptosis
→
neurodegeneration

Evidence for (8)

Ferroptosis mediates selective motor neuron death in amyotrophic lateral sclerosis
Overexpression of ferroptosis defense enzyme Gpx4 retards motor neuron disease of SOD1G93A mice
Palmitoylation of GPX4 via the targetable ZDHHC8 determines ferroptosis sensitivity and antitumor immunity.

PMID:40108413 2025 Nat Cancer
Pathophysiology and Diagnosis of ALS: Insights from Advances in Neurophysiological Techniques.

PMID:31185581 2019 Int J Mol Sci
The genetics of amyotrophic lateral sclerosis.

PMID:38967083 2024 Curr Opin Neurol
Stress Granules and ALS: A Case of Causation or Correlation?

PMID:29916020 2018 Adv Neurobiol
Endogenous retroviruses are dysregulated in ALS.

PMID:38989463 2024 iScience
Updates on Disease Mechanisms and Therapeutics for Amyotrophic Lateral Sclerosis.

PMID:38891021 2024 Cells

Evidence against (2)

The essential elements of Alzheimer's disease.

PMID:33219130 2021 J Biol Chem

Evidence matrix

6 supporting 1 contradicting

53% posterior support

Supporting

Palmitoylation of GPX4 via the targetable ZDHHC8 determines ferroptosis sensitivity and antitumor immunity. PMID:40108413 · 2025 · Nat Cancer
Pathophysiology and Diagnosis of ALS: Insights from Advances in Neurophysiological Techniques. PMID:31185581 · 2019 · Int J Mol Sci
The genetics of amyotrophic lateral sclerosis. PMID:38967083 · 2024 · Curr Opin Neurol
Stress Granules and ALS: A Case of Causation or Correlation? PMID:29916020 · 2018 · Adv Neurobiol
Endogenous retroviruses are dysregulated in ALS. PMID:38989463 · 2024 · iScience
Updates on Disease Mechanisms and Therapeutics for Amyotrophic Lateral Sclerosis. PMID:38891021 · 2024 · Cells

Contradicting

The essential elements of Alzheimer's disease. PMID:33219130 · 2021 · J Biol Chem

Bayesian persona consensus

53% posterior support

1 signal · 1 for / 0 against · agreement 100%

scidex.consensus.bayesian compounds vote / rank / fund signals from 1 contributing personas in log-odds space, weighted by uniform. Prior 50%.

Cite this hypothesis

Citation

etl-backfill (2026). GPX4 reserve failure gates selective ALS motor-neuron ferroptosis. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-3156f6bcd349

BibTeX

@misc{scidex_hypothesis_h3156f6b,
  title        = {GPX4 reserve failure gates selective ALS motor-neuron ferroptosis},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-3156f6bcd349},
  note         = {SciDEX artifact hypothesis:h-3156f6bcd349}
}