Journal
STEROIDS
Volume 67, Issue 9, Pages 783-788Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S0039-128X(02)00037-5
Keywords
cortisol secretion rate; cortisol-C-13(4); deconvolution analysis; mass spectrometry
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Plasma concentration measurements of C-13-labeled cortisol ([1,2,4,19-C-13(4)]cortisol, cortisol-C-13(4)) and its metabolite cortisone-C-13(4) were made simultaneously with measurements of endogenous cortisol and cortisone by gas chromatography-mass spectrometry (GC-MS). After administering a small amount (3 mg) of cortisol-C-13(4) to a human subject, changes in cortisol secretion rates were estimated by deconvolution techniques from the measured plasma cortisol and cortisone levels and the rates of elimination and interconversion of cortisol and cortisone were obtained from the plasma concentration-time data of cortisol-C-13(4) and cortisone-C-13(4). The objective of this study was to look for a novel approach to quantitate rates of minute-to-minute cortisol secretion in man by taking into account the interconversion of cortisol and cortisone by 11beta-hydroxysteroid dehydrogenase (11beta-HSD). (C) 2002 Elsevier Science Inc. All rights reserved.
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