Hypothalamic-pituitary-adrenal axis activity in older persons with and without a depressive disorderRhebergen, D., Korten, N. C. M., Penninx, B. W. J. H., Stek, M. L., van der Mast, R. C., Voshaar, R. O. & Comijs, H. C., Jan-2015, In : Psychoneuroendocrinology. 51, p. 341-350 10 p.
Research output: Contribution to journal › Article › Academic › peer-review
Background: Altered functioning of the hypothalamic-pituitary-adrenal axis (HPA-axis) has been associated with depression, but findings have been inconsistent. Among older depressed persons, both hyperactivity and hypo-activity of the HPA-axis were demonstrated. However, most studies were population-based studies, with single cortisol measurements, lacking insight into diurnal patterns of HPA-axis functioning. We aim to provide insight into functioning of the HPA-axis, assessed by various salivary cortisol samples, in depressed older adults and non-depressed controls.
Methods: Data were derived from the Netherlands Study of Depression in Older Persons. Cortisol levels of older persons without a lifetime diagnosis of depression and/or anxiety (n=109) were compared with older persons with a 6-month major depression diagnosis (n=311). ANCOVA analyses and random coefficient analysis on the four morning cortisol samples were performed. A possible U-shaped association between cortisol and depression status was examined.
Results: Depressed older persons showed higher morning cortisol levels at awakening (T1) and a less dynamic awakening response compared to non-depressed older persons. Dexamethasone suppression did not differ across groups. No U-shaped association between HPA-axis activity and depression was observed.
Conclusion: We demonstrated a hypercortisolemic state and a diminished ability to respond to the stress of awakening among depressed older persons. Previously it was shown, that hypercortisolemic states may indicate a lifelong biological vulnerability for depression. Our findings expand on previous literature by demonstrating that in older persons the I-IPA-axis may become Less responsive to stress, culminating in a further dysregulation of the diurnal cortisol-rhythm, superimposed on - possibly lifelong - hypercortisolemic states. (C) 2014 Elsevier Ltd. All rights reserved.
|Number of pages||10|
|Publication status||Published - Jan-2015|
- Cortisol, HPA-axis, Depression, Older persons, UNDER-THE-CURVE, SALIVARY CORTISOL, LATE-LIFE, DIURNAL CYCLE, SYMPTOMS, METAANALYSIS, RELIABILITY, POPULATION, VALIDITY, DEFICITS