Circadian Variations in Plasma ACTH, Cortisol and β-Endorphin Levels in Normal-Weight Bulimic Women
作者:
P.P. Vescovi,
G. Rastelli,
R. Volpi,
P. Chiodera,
C. Di Gennaro,
V. Coiro,
期刊:
Neuropsychobiology
(Karger Available online 1996)
卷期:
Volume 33,
issue 2
页码: 71-75
ISSN:0302-282X
年代: 1996
DOI:10.1159/000119252
出版商: S. Karger AG
关键词: Bulimia nervosa;Adrenocorticotropic hormone;Cortisol;β-Endorphin;Circadian rhythms
数据来源: Karger
摘要:
In order to establish possible alterations in the secretory patterns of adrenocorticotropic hormone (ACTH), cortisol and/or β-endorphin in bulimia nervosa, the circadian fluctuations of these hormones were evaluated in blood samples taken at 1-hour intervals over 24 h. Eleven bulimic women with normal body weight and 8 weight- and age-matched normal controls were tested during the follicular phase (days 6-8) of normal menstrual cycles. All women were hospitalized for bulimia or for checkup examinations and were tested 3 days after hospital admission. Both normal and bulimic women showed maximal ACTH, cortisol and β-endorphin levels at 08.00 h, with minimal ACTH and β-endorphin levels at midnight and cortisol levels at 02.00 h. The general temporal structure of all hormonal secretions coincided in the two groups. However, whereas all measured ACTH/cortisol levels were quantitatively similar in the two groups, plasma β-endorphin concentrations were significantly higher in bulimic than in control subjects at all examined time points. The enhancement in the overall 24-hour β-endorphin secretion suggests the presence of an increased opioid tonus in bulimic women, which might play a role in the pathophysiology of the eating diso
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