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Exploring the causal impact of mitochondrial dysfunction on epilepsy: a mendelian randomization study.

Lin-Ming Zhang1, Fei Wang2, Bing-Ran Zhang3

  • 1Department of Neurology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China.

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Medicas E Biologicas
|March 11, 2026
PubMed
Summary

Researchers identified three key genes—hydroxyacylglutathione hydrolase (HAGH), oxysterol-binding protein-related protein 1A (OSBPL1A), and pantothenate kinase 2 (PANK2)—as critical drivers of epilepsy. These genes link mitochondrial dysfunction to neuroinflammation and apoptosis, offering new therapeutic targets.

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Area of Science:

  • Neuroscience
  • Genetics
  • Mitochondrial Biology

Background:

  • Mitochondrial dysfunction is a known contributor to epileptogenesis.
  • Identifying specific genes involved in mitochondrial function and epilepsy is crucial for understanding disease mechanisms.

Purpose of the Study:

  • To investigate the causal relationship between mitochondrial function-associated genes and epilepsy.
  • To identify key genes that link mitochondrial dysfunction to epileptogenesis.

Main Methods:

  • Expression quantitative trait loci (eQTL) analysis to identify gene associations.
  • Mendelian randomization to assess causality.
  • Leave-one-out validation to confirm results.

Main Results:

  • Hydroxyacylglutathione hydrolase (HAGH), oxysterol-binding protein-related protein 1A (OSBPL1A), and pantothenate kinase 2 (PANK2) were identified as pivotal epileptogenic genes.
  • These genes modulate pathways including mTORC1, apoptosis, ROS, PI3K/AKT, Notch, TCR, MAPK, and TNF signaling.
  • HAGH, OSBPL1A, and PANK2 were shown to be core pathogenic mechanisms in epilepsy.

Conclusions:

  • HAGH, OSBPL1A, and PANK2 are central to epilepsy pathogenesis, linking mitochondrial regulation to neuroinflammation, immunomodulation, and apoptosis.
  • These findings offer a basis for developing novel therapeutic strategies and prognostic biomarkers for epilepsy.