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Gaab, Jens; Hüster, Dominik; Peisen, Renate; Engert, Veronika; Schad, Tanja; Schürmeyer, Thomas H; Ehlert, Ulrike (2002). Low-dose dexamethasone suppression test in chronic fatigue syndrome and health. Psychosomatic Medicine, 64(2):311-318.

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Abstract

OBJECTIVE: Subtle dysregulations of the hypothalamus-pituitary-adrenal axis in chronic fatigue syndrome have been described. The aim of this study was to examine the negative feedback regulations of the hypothalamus-pituitary-adrenal axis in chronic fatigue syndrome.

METHODS: In 21 patients with chronic fatigue syndrome and 21 healthy control subjects, awakening and circadian salivary free cortisol profiles were assessed over 2 consecutive days and compared with awakening and circadian salivary free cortisol profiles after administration of 0.5 mg of dexamethasone at 11:00 PM the previous day.

RESULTS: Patients with chronic fatigue syndrome had normal salivary free cortisol profiles but showed enhanced and prolonged suppression of salivary free cortisol after the administration of 0.5 mg of dexamethasone in comparison to the control subjects.

CONCLUSIONS: Enhanced negative feedback of the hypothalamus-pituitary-adrenal axis could be a plausible explanation for the previously described alterations in hypothalamus-pituitary-adrenal axis functioning in chronic fatigue syndrome. Because similar changes have been described in stress-related disorders, a putative role of stress in the pathogenesis of the enhanced feedback is possible.

Citations

59 citations in Web of Science®
75 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:06 Faculty of Arts > Institute of Psychology
DDC:150 Psychology
Date:2002
Deposited On:10 Oct 2012 15:10
Last Modified:11 May 2014 06:13
Publisher:American Psychosomatic Society
ISSN:0033-3174
Publisher DOI:10.1097/00006842-200203000-00015
PubMed ID:11914448

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