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Biological aspects of depression.

N Matussek

    Psychopathology
    |January 1, 1986
    PubMed
    Summary

    Endogenous depression patients show a reduced growth hormone (GH) response to clonidine, suggesting a potential vulnerability marker. This blunted GH response may stem from decreased alpha 2-adrenoceptor sensitivity.

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    Area of Science:

    • Neuroendocrinology
    • Psychiatry
    • Pharmacology

    Background:

    • Neuroendocrine studies indicate differences in growth hormone (GH) release among patient groups.
    • The clonidine-growth hormone stimulation test is used to assess neuroendocrine function.

    Purpose of the Study:

    • To investigate the GH response to clonidine in endogenous depressive patients.
    • To explore the potential of GH response as a trait marker for endogenous depression.
    • To examine the role of alpha 2-adrenoceptor sensitivity in depression.

    Main Methods:

    • Utilized the clonidine-growth hormone stimulation test.
    • Compared GH response in endogenous depressives, neurotic depressives, schizophrenics, and controls.

    Main Results:

    • Endogenous depressive patients exhibited a significantly reduced GH response to clonidine compared to other groups.
    • This blunted GH response suggests a potential trait marker or vulnerability factor for endogenous depression.
    • The findings may be explained by reduced postsynaptic alpha 2-adrenoceptor sensitivity.

    Conclusions:

    • A blunted GH response to clonidine is a potential biomarker for endogenous depression.
    • Reduced alpha 2-adrenoceptor sensitivity is implicated in the pathophysiology of endogenous depression.
    • Endorphinergic and cholinergic systems may influence alpha 2-adrenoceptor sensitivity in depression.

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