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Cortisol Metabolism in Depressed Patients and Healthy Controls





Neuroendocrinology. 2009 Aug 28. [Epub ahead of print]


Cortisol Metabolism in Depressed Patients and Healthy Controls.


Römer B, Lewicka S, Kopf D, Lederbogen F, Hamann B, Gilles M, Schilling C, Onken V, Frankhauser P, Deuschle M. Central Institute of Mental Health, J5, Mannheim, Germany.



Background: Chronic stress as well as major depressive disorders are associated with hypercortisolemia and impaired hypothalamic-pituitary-adrenocortical axis functioning. The aim of this study was to determine whether in major depression changes in the activity patterns of local modulators of glucocorticoid action might contribute to an increase in cortisol bioavailability and if they change during antidepressant treatment and clinical response.


Methods: Concentrations of urinary total cortisol (UFF), urinary total cortisone (UFE), tetrahydrocortisone (THE), tetrahydrocortisol (THF) and allo-THF (5alpha-THF) were measured in 10-hour nocturnal urine samples of 19 depressed patients and 15 healthy controls. The activity of 11beta-hydroxysteroid dehydrogenases (11beta-HSD) as well as 5alpha- and 5beta-reductases was assessed by calculating the ratios of glucocorticoid metabolites. Patients were treated for 28 days with either mirtazapine or venlafaxine. Enzyme activity was observed during the course of treatment and compared to healthy controls. Responders to treatment were selected for this analysis.


Results: Depressed patients showed reduced 5alpha-reductase activity manifested as a significantly lower amount of 5alpha-THF (102.8 +/- 167.2 vs. 194.6 +/- 165.8 mug, p = 0.019). The increase in the UFF/UFE ratio (0.73 +/- 0.32 vs. 0.29 +/- 0.13, p < 0.0001) indicates reduced activity of renal 11beta-hydroxysteroid dehydrogenase type 2 (11beta-HSD2). During pharmacological treatment, 5alpha-reductase activity in patients returned to the level of the control group, while the decrease in 11beta-HSD2 activity persisted until day 28.


Conclusions: Our results show changes in activity of intracellular modulators of steroid action in major depressive disorders, particularly a reduced activity of the intracellular cortisol-deactivating enzymes 5alpha-reductase and 11beta-HSD2. These changes suggest an increase in cortisol bioavailability within tissues. Copyright © 2009 S. Karger AG, Basel.


PMID: 19713693 [PubMed - as supplied by publisher]










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