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Related Experiment Videos

Cortisol escape from morphine suppression.

A P Zis, R F Haskett, A A Albala

    Psychiatry Research
    |June 1, 1985
    PubMed
    Summary
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    Morphine injection suppressed cortisol levels in psychiatric patients. Early cortisol recovery, or escape, was more common in major depressive disorder patients, suggesting a diagnostic marker for depression.

    Area of Science:

    • Neuroendocrinology
    • Psychiatry

    Background:

    • The hypothalamic-pituitary-adrenal (HPA) axis is implicated in the pathophysiology of major depressive disorder.
    • Opioid peptides, like morphine, can modulate HPA axis activity and cortisol secretion.

    Purpose of the Study:

    • To investigate the effect of intravenous morphine on cortisol secretion in psychiatric patients and healthy volunteers.
    • To assess the potential of morphine-induced cortisol response, specifically the 'escape' phenomenon, as a diagnostic marker for major depressive disorder.

    Main Methods:

    • Twenty-one unmedicated psychiatric patients and four healthy male volunteers received a 2.5 mg intravenous morphine injection.
    • Blood samples were collected before and at 30-minute intervals for 3 hours post-injection to measure cortisol levels.
    • Dexamethasone suppression test results were also considered for patient characterization.

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    Main Results:

    • Morphine administration led to a suppression of cortisol secretion in all participants.
    • An early resumption of cortisol secretion ('escape') was observed more frequently in patients diagnosed with major depressive disorder.
    • Patients with abnormal dexamethasone suppression test results also showed a higher frequency of cortisol escape.
    • The diagnostic sensitivity and specificity of this morphine infusion paradigm for major depressive disorder were 40% and 82%, respectively.

    Conclusions:

    • Morphine-induced cortisol suppression and subsequent escape provide insights into HPA axis dysregulation in major depressive disorder.
    • The 'escape' phenomenon following morphine administration may serve as a potential biomarker for identifying major depressive disorder.