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Function of the adrenal cortex in patients with major depression
Psychiatry Research
|October 1, 1987
Summary
Depressed patients with abnormal dexamethasone suppression tests show heightened adrenal gland responsiveness. This suggests hypothalamic-pituitary-adrenal axis overactivity linked to adrenocortical hyperresponsiveness in a subset of depression.
Area of Science:
- Neuroendocrinology
- Psychiatry
- Endocrinology
Background:
- Dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis is common in depression.
- Approximately 50% of depressed patients fail to suppress cortisol secretion after dexamethasone administration.
Purpose of the Study:
- To investigate if HPA axis overactivity in depressed patients is linked to adrenocortical hyperresponsiveness.
- To differentiate HPA axis function in depressed patients based on dexamethasone suppression test (DST) results.
Main Methods:
- Dexamethasone suppression tests (DSTs) and adrenocorticotropic hormone (ACTH) stimulation tests were conducted.
- Participants were categorized into three groups: depressed nonsuppressors, depressed suppressors, and other psychiatric disorder suppressors.
- Cortisol and ACTH levels were measured before and after dexamethasone and ACTH administration.
Main Results:
- Depressed nonsuppressors exhibited higher predexamethasone and postdexamethasone cortisol levels compared to other groups.
- No significant differences in ACTH concentrations were observed among the groups.
- Depressed nonsuppressors showed a greater increase in stimulated cortisol secretion after alpha-ACTH[1-24] administration.
Conclusions:
- HPA axis overactivity in a subgroup of depressed patients is associated with adrenocortical hyperresponsiveness.
- These findings highlight a specific neuroendocrine abnormality in certain individuals with depression.