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Related Experiment Videos

GABA and affective disorders.

K G Lloyd1, P L Morselli, G Bartholini

  • 1Laboratories D'Etudes et de Recherches Synthelabo (L.E.R.S.), Bagneux, France.

Medical Biology
|January 1, 1987
PubMed
Summary
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Central GABAergic dysfunction is linked to affective disorders. Antidepressant treatments, including medications and electroconvulsive therapy (ECT), show therapeutic effects by modulating GABAergic systems and GABAB receptors.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Pharmacology

Background:

  • Accumulating evidence suggests a primary role for central GABAergic dysfunction in affective disorders.
  • Depressed patients exhibit reduced levels of GABA in cerebrospinal fluid (CSF) and plasma, alongside decreased GABA synthesis in brain regions like the frontal cortex.

Purpose of the Study:

  • To investigate the involvement of the GABAergic system in the pathology and treatment of affective disorders.
  • To explore the mechanisms of antidepressant action, particularly the role of GABAergic and beta-adrenergic pathways.

Main Methods:

  • Review of existing evidence on GABA levels, GABAergic drug efficacy, and behavioral models of depression.
  • Analysis of GABAB receptor expression and GABA release in response to antidepressant treatments in animal models.

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  • Examination of the interplay between GABAergic and beta-adrenergic systems in antidepressant effects.

    • Main Results:

    • GABAmimetics (e.g., progabide, fengabine) demonstrate therapeutic effects in depression and exhibit antidepressant-like actions in animal models.
    • Antidepressants and ECT upregulate GABAB receptors in the frontal cortex and reverse associated decreases observed in depression models.
    • Antidepressants also downregulate beta-adrenergic receptors, suggesting a combined GABAergic and adrenergic mechanism.

    Conclusions:

    • Central GABAergic dysfunction is a key factor in affective disorders.
    • Antidepressant therapies, including pharmacological agents and ECT, possess intrinsic GABAergic components.
    • The antidepressant effect likely involves the coordinated modulation of both GABAergic and beta-adrenergic systems.