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Related Experiment Videos

Membrane phospholipid abnormalities in postmortem brains from schizophrenic patients.

J K Yao1, S Leonard, R D Reddy

  • 1VA Pittsburgh Healthcare System, Pittsburgh, PA 15206, USA. jkyao@vms.cis.pitt.edu

Schizophrenia Research
|March 9, 2000
PubMed
Summary

Schizophrenia patients show reduced membrane phospholipids like phosphatidylcholine and phosphatidylethanolamine in brain tissue. Deficits in polyunsaturated fatty acids, particularly arachidonic acid, were also observed in schizophrenic brains.

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Psychiatry

Background:

  • Previous research indicated altered membrane phospholipids and polyunsaturated fatty acids (PUFAs) in schizophrenia, primarily in non-neuronal cells.
  • It remains unclear if these membrane deficits extend to the brain tissue itself.

Purpose of the Study:

  • To investigate whether membrane phospholipid and PUFA deficits observed in peripheral tissues of schizophrenia patients are also present in postmortem brain tissue.
  • To compare membrane composition in the caudate nucleus of schizophrenic patients versus control groups.

Main Methods:

  • High-pressure liquid chromatography (HPLC) with an evaporative light-scattering detector was used to quantify membrane phospholipids (PL).
  • Capillary gas chromatography was employed to determine polyunsaturated fatty acid (PUFA) levels.

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  • Schizophrenic (n=11) and control (n=21) groups were analyzed, with controls further divided into those with (n=7) and without (n=14) other mental disorders.

    • Main Results:

    • Significantly lower levels of phosphatidylcholine and phosphatidylethanolamine were found in the postmortem brains of schizophrenic patients compared to controls.
    • Schizophrenic brains exhibited substantial reductions in total PUFAs and saturated fatty acids.
    • Decreases in arachidonic acid (AA) and its precursors (linoleic, eicosadienoic acids) were the primary drivers of PUFA reduction.

    Conclusions:

    • The study confirms that membrane phospholipid and fatty acid deficits observed peripherally in schizophrenia are also present in brain tissue.
    • Reduced levels of membrane arachidonic acid in the brain may contribute to the complex biological and clinical manifestations of schizophrenia.
    • No significant differences were found between control groups with and without other mental disorders, strengthening the findings specific to schizophrenia.