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Related Experiment Videos

Mitochondrial complex I subunits expression is altered in schizophrenia: a postmortem study.

Rachel Karry1, Ehud Klein, Dorit Ben Shachar

  • 1Laboratory of Psychobiology, Department of Psychiatry, Rambam Medical Center, Rappaport Faculty of Medicine, Technion, Haifa, Israel.

Biological Psychiatry
|March 25, 2004
PubMed
Summary
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Mitochondrial complex I subunits are reduced in the prefrontal cortex of schizophrenia patients, suggesting mitochondrial dysfunction contributes to hypofrontality. Expression changes vary by brain region, indicating broader cerebral circuitry impairment in schizophrenia.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Psychiatry

Background:

  • Mitochondrial dysfunction is implicated in schizophrenia.
  • Evidence includes altered gene expression and oxidative phosphorylation system deficits.

Purpose of the Study:

  • To investigate mitochondrial complex I subunit expression in schizophrenia.
  • To compare expression in prefrontal and ventral parietooccipital cortices.

Main Methods:

  • Analysis of mRNA and protein levels for three mitochondrial complex I subunits.
  • Postmortem brain specimens from schizophrenia, major depression, bipolar disorder, and control subjects.

Main Results:

  • Significant decrease in 24-kDa and 51-kDa complex I subunits (mRNA and protein) in the prefrontal cortex of schizophrenia patients.

Related Experiment Videos

  • Increase in these subunits in the ventral parietooccipital cortex of schizophrenia and bipolar patients.
  • No change in the 75-kDa subunit in the prefrontal cortex.

    • Conclusions:

    • Reduced complex I in the prefrontal cortex supports mitochondrial dysfunction in schizophrenia and hypofrontality.
    • Bidirectional expression changes suggest impaired cerebral circuitry in schizophrenia.
    • Similarities in expression changes between schizophrenia and bipolar disorder patients may reflect overlapping symptoms.