Associations between neuroendocrine responses to the Insulin Tolerance Test and patient characteristics in chronic fatigue syndrome
| Autor: | Ulrike Ehlert, Jens Gaab, Thomas H. Schürmeyer, Tanja Schad, Vera Heitz, Veronika Engert |
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| Přispěvatelé: | University of Zurich, Gaab, Jens |
| Rok vydání: | 2002 |
| Předmět: |
musculoskeletal diseases
Adult Male endocrine system medicine.medical_specialty Hypothalamo-Hypophyseal System Hydrocortisone Corticotropin-Releasing Hormone Pituitary-Adrenal System Adrenocorticotropic hormone Anxiety Gastroenterology Severity of Illness Index 2738 Psychiatry and Mental Health Deconditioning Adrenocorticotropic Hormone Internal medicine medicine Chronic fatigue syndrome Humans Insulin Fatigue Syndrome Chronic 10093 Institute of Psychology Depression Insulin tolerance test 3203 Clinical Psychology virus diseases Middle Aged medicine.disease Psychiatry and Mental health Clinical Psychology Endocrinology Cross-Sectional Studies Female medicine.symptom Insulin Resistance Psychology 150 Psychology Anxiety disorder Glucocorticoid medicine.drug |
| Zdroj: | Journal of psychosomatic research. 56(4) |
| ISSN: | 0022-3999 |
| Popis: | Objective: Subtle dysregulations of the hypothalamic-pituitary-adrenal (HPA) axis have been proposed as an underlying pathophysiological mechanism in chronic fatigue syndrome (CFS). This study attempted to assess the relationship between patient characteristics and HPA axis functioning using a neuroendocrine challenge test. Method: A test battery designed to assess different dimensions of CFS was given to 18 CFS patients and 17 controls. To evaluate the integrity of the HPA axis, the Insulin Tolerance Test (ITT), a centrally acting neuroendocrine challenge test, was performed on patients and controls. ACTH, salivary free cortisol and total plasma cortisol levels were assessed as a measure of the HPA axis stress response. Correlations of patient characteristics were calculated with integrated responses for all endocrine parameters. Results: CFS patients had a significantly reduced area under the ACTH response curve (AUC) in the ITT. The AUC was significantly associated with the duration of CFS symptoms (r=-.592, P=.005) and the severity of fatigue symptomatology (r=-.41, P=.045). In addition, duration of CFS was correlated with the severity of fatigue symptoms (r=.38, P=.045). Similar associations were not observed for cortisol parameters. Conclusion: It has been postulated that neuroendocrine dysregulations observed in CFS are of an acquired nature. The results of a strong association between the integrated ACTH response and the duration of CFS emphasizes the need to consider factors known to be risk factors for the chronicity of CFS symptoms, such as profound inactivity, deconditioning and sleep abnormalities, as possible candidates for secondary causes of neuroendocrine dysregulations in CFS. (C) 2004 Elsevier Inc. All rights reserved. |
| Databáze: | OpenAIRE |
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