Summary
Twenty subjects (10 patients with a major depressive episode and 10 individually matched healthy controls) received 100 μg synthetic human corticotropin-releasing hormone (hCRH) as an i.v. bolus dose. Healthy subjects and depressed patients exhibited a significant increase of plasma somatostatin (SRIH) concentrations with no difference between both comparison groups. Compared to controls, depressed patients showed a significant attenuation of corticotropin (ACTH) responses, while cortisol secretion in response to hCRH was normal. No correlations were found among basal plasma concentrations of SRIH, ACTH or cortisol and SRIH, ACTH or cortisol responses following hCRH. These findings are compatible with the hypothesis that hypothalamic-pituitary-adrenal (HPA) hyperactivity in the depressive state may primarily be due to central hypersecretion of CRH and support the view of a hCRH-induced SRIH secretion which is not related to HPA dysfunction associated with major depression.
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Lesch, K.P., Widerlöv, E., Ekman, R. et al. The influence of human corticotropin-releasing hormone on somatostatin secretion in depressed patients and controls. J. Neural Transmission 75, 111–118 (1989). https://doi.org/10.1007/BF01677424
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DOI: https://doi.org/10.1007/BF01677424