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Related Experiment Videos

Cortisol secretion in endogenous depression. I. Basal plasma levels.

U Halbreich, G M Asnis, R Shindledecker

    Archives of General Psychiatry
    |September 1, 1985
    PubMed
    Summary

    Endogenously depressed patients show higher mean 24-hour plasma cortisol levels. Cortisol levels between 1-4 PM reliably indicate overall cortisol secretion, aiding in depression research.

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    Area of Science:

    • Endocrinology
    • Psychiatry
    • Neuroscience

    Background:

    • Endogenous depression (ED) is associated with altered cortisol secretion patterns.
    • The dexamethasone suppression test (DST) is a common diagnostic tool, but its relationship with overall cortisol levels requires further clarification.

    Purpose of the Study:

    • To investigate 24-hour plasma cortisol levels in endogenously depressed patients compared to normal controls.
    • To examine the correlation between mean 24-hour plasma cortisol and cortisol levels measured between 1-4 PM.
    • To assess the relationship between DST results and basal cortisol levels.

    Main Methods:

    • Collected 24-hour plasma cortisol samples from 32 endogenously depressed patients and 72 normal controls.
    • Administered the dexamethasone suppression test to all participants.

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  • Analyzed plasma cortisol levels and correlated diurnal patterns with DST results.

    • Main Results:

    • Endogenously depressed patients exhibited significantly higher mean 24-hour plasma cortisol levels than controls.
    • A marked overlap in mean 24-hour plasma cortisol values was observed between the two groups.
    • Mean plasma cortisol levels between 1-4 PM were highly correlated with mean 24-hour plasma cortisol in ED patients.
    • Abnormal DST results showed only a partial correlation with basal cortisol levels.

    Conclusions:

    • Mean 24-hour plasma cortisol levels are elevated in endogenously depressed patients, though with significant overlap with normal controls.
    • Cortisol levels measured between 1-4 PM serve as a reliable indicator of overall 24-hour cortisol secretion.
    • The 1-4 PM cortisol measurement may offer a practical alternative for assessing cortisol secretion patterns in depression and other conditions.