Causal association between mitochondrial function and psychiatric disorders: Insights from a bidirectional two-sample...

Area of Science:

• Genetics
• Neuroscience
• Mitochondrial Biology

Background:

• Observational studies suggest a link between mitochondrial dysfunction and psychiatric disorders.
• The causal relationship between mitochondrial function and mental health remains largely unestablished.

Purpose of the Study:

• To investigate potential causal associations between mitochondrial proteins and psychiatric disorders.
• To explore the role of mitochondrial function in the pathogenesis of mental health conditions.

Main Methods:

• Utilized Mendelian randomization (MR) with genetic instruments for 67 mitochondrial proteins and 10 psychiatric disorders.
• Employed five MR methods, false discovery rate correction, and sensitivity analyses to ensure result robustness.
• Conducted reverse MR analyses to rule out reverse causality.

Main Results:

• Identified two significant causal associations: Phenylalanine-tRNA ligase increasing Alzheimer's disease risk and Mitochondrial glutamate carrier 2 decreasing autism spectrum disorder risk.
• Detected 24 suggestive causal associations.
• Found no evidence of significant pleiotropy, heterogeneity, or reverse causality.

Conclusions:

• Provides novel insights into the mitochondrial-psychiatric disorder relationship.
• Suggests potential therapeutic targets for psychiatric disorders by modulating mitochondrial function.
• Highlights the need for further research, particularly in diverse ancestral populations.