Alterations in serum cortisol and its binding characteristics in anorexia nervosa

Regina C. Casper*, Robert T. Chatterton, John M. Davis

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

The binding capacity and apparent binding affinity of corticosteroid-binding globulin (CBG) for cortisol was studied in 20 women hospitalized for anorexia nervosa. The binding capacity for cortisol, as determined kinetically at 0 C by the method of Scatchard, was similar in anorectic patients and control subjects, with mean values of 26.9 and 21.9 μg/100 ml, respectively. The mean apparent affinity constant of CBG for cortisol was found to be significantly (P < 0.01) lower (14.1 X 108 M‑1) than that in control subjects (22.3 X 108 M‑1) and was similar in blood drawn at 0830 and 2000 h. Mean morning total serum cortisol concentrations were higher in anorectic women (23.3 μg/100 ml) than in controls (10.0 jug/100 ml; P < 0.001) and frequently exceeded the binding capacity of CBG. Diurnal variation was present. Mean serum 17β-estradiol levels were low (40.0 pg/ml) and serum progesterone was essentially absent, but mean serum testosterone levels were within the normal range. Eight patients who were retested after weight gain, when they were between 76-100% of ideal body weight, exhibited no significant changes in serum steroids or in the binding capacity or apparent affinity of CBG for cortisol.

Original languageEnglish (US)
Pages (from-to)406-411
Number of pages6
JournalJournal of Clinical Endocrinology and Metabolism
Volume49
Issue number3
DOIs
StatePublished - Jan 1 1979

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ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical

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