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GABA and brain abnormalities in schizophrenia

D P van Kammen1, F Petty, M E Kelley

  • 1VA Pittsburgh Healthcare System, PA 15206, USA. dpvk@pitt.edu

Psychiatry Research
|June 30, 1998
PubMed
Summary
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Plasma gamma-aminobutyric acid (GABA) levels correlate with specific brain structural changes in schizophrenia, suggesting localized GABA transmission impairment rather than a global deficit. This finding offers new insights into schizophrenia

Area of Science:

  • Neuroscience
  • Psychiatry
  • Neuroimaging

Background:

  • Autopsy studies suggest reduced gamma-aminobutyric acid (GABA) function in schizophrenia-affected brain regions.
  • Schizophrenia is characterized by specific structural brain abnormalities.

Purpose of the Study:

  • To investigate the association between cerebrospinal fluid (CSF) and plasma GABA levels and brain structural measures in schizophrenia patients.
  • To determine if GABAergic deficits in schizophrenia are localized or global.

Main Methods:

  • Evaluated 62 drug-free, healthy male schizophrenia patients (DSM-IIIR).
  • Measured plasma and CSF GABA levels.
  • Assessed brain structural measures using CT scans.

Main Results:

Related Experiment Videos

  • Plasma GABA levels showed significant associations with prefrontal sulcal widening and ventricular-brain ratios (VBRs).
  • CSF GABA levels were not associated with brain structural measures but correlated with age and age of onset.
  • No association was found between plasma or CSF GABA and global sulcal widening.

Conclusions:

  • The relationship between plasma GABA and specific brain morphology suggests localized GABAergic dysfunction in schizophrenia.
  • Findings indicate that GABA transmission impairment in schizophrenia may be a local, not global, phenomenon.