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Abstract
Disturbances in the hypothalamo-pituitary-adrenal (HPA) and other endocrine axes were
assessed in 24 women with bulimia and healthy controls. Overnight blood samples for
measuring nocturnal plasma cortisol, prolactin (PRL), growth hormone (GH), luteinizing
hormone (LH), and follicle stimulating hormone (FSH) were obtained at 30-min intervals.
A 1.5 mg dexamethasone suppression test (DST) and a TRH-test were performed. Patients
were monitored closely while their nutritional intake was recorded over 21 days. Compared
with healthy controls, nocturnal cortisol plasma levels were not elevated in the bulimics.
There was a trend toward insufficient cortisol suppression in the DST in patients
with bulimia which was most pronounced in patients with signs of restricted caloric
intake. Plasma dexamethasone levels were significantly reduced in bulimics compared
with healthy controls. There was a trend for blunted thyrothropin stimulating hormone
(TSH) responses to thyrotropin in releasing hormone (TRH) in bulimia. The prolactin
response to TRH was significantly reduced in bulimics with a history of anorexia nervosa.
Plasma LH and plasma FSH were significantly reduced in bulimics with signs of reduced
caloric intake [low T3, high levels of beta-hydroxy-butyric acid (BHBA), reduced daily caloric intake, high
number of fasting days] as compared with healthy controls. Bulimics with high BHBA
levels had significantly reduced nocturnal prolactin plasma levels. Results show that
multiple neuroendocrine disturbances exist in bulimia in a milder form than in anorexia
nervosa. Evidence for the impact of caloric intake on endocrine functions is presented.
Endocrine dysfunctions in our bulimic sample did not show a positive association with
the presence of depressive symptoms.
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Article info
Publication history
Received in revised form:
June 8,
1989
Received:
March 1,
1988
Identification
Copyright
© 1990 Published by Elsevier Inc.