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Patterns of melatonin rhythms in depression.

A Frazer, R Brown, J Kocsis

    Journal of Neural Transmission. Supplementum
    |January 1, 1986
    PubMed
    Summary
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    Depressed patients with melancholia show a reduced nocturnal rise in melatonin. This suggests altered beta-adrenergic receptor function in melancholic depression, impacting melatonin production.

    Area of Science:

    • Neuroendocrinology
    • Psychiatry

    Background:

    • Melatonin's nocturnal serum rise is regulated by norepinephrine (NE) acting on pineal beta-adrenergic receptors.
    • Altered beta-adrenergic receptor function is hypothesized in patients with depression.

    Observation:

    • Melatonin levels were measured in depressed patients (melancholic and non-melancholic) and healthy controls.
    • Serum samples were collected nocturnally and in the morning across two studies.

    Findings:

    • Melancholic depressives exhibited a significantly blunted nocturnal melatonin elevation compared to controls.
    • Lower 11 p.m. melatonin concentrations were observed in melancholic depressives versus controls and non-melancholic depressives.

    Implications:

    • Findings suggest impaired beta-adrenergic receptor function in melancholic depression, affecting melatonin synthesis.

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  • Further research is needed to understand the precise mechanisms underlying these observed neuroendocrine changes.