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  • Title: Production rates of cortisol in obesity.
    Author: Vierhapper H, Nowotny P, Waldhäusl W.
    Journal: Obes Res; 2004 Sep; 12(9):1421-5. PubMed ID: 15483206.
    Abstract:
    OBJECTIVE: To determine the metabolic clearance rates (MCRs) and endogenous production rates (PRs) of cortisol (F) in grades 2 and 3 obese men (n = 9) and women (n = 6). RESEARCH METHODS AND PROCEDURES: The MCRs and the endogenous PRs of cortisol (F) were determined in grades 2 and 3 obese men (n = 9) and women (n = 6) using the stable isotope dilution technique and mass spectrometry. RESULTS: In obese women, endogenous PRs of F (0.6 +/- 0.4 mg/h) were similar to those of nonobese women, but MCRs of F were higher in obese women (9 +/- 4 L/h) compared with nonobese women (5 + 2 L/h; p < 0.05). The MCR of F was correlated with the ratio of excreted cortisone to F metabolites. Furthermore, obese women were characterized by an increased ratio of androsterone to etiocholanolone (p < 0.01). In obese men, the MCRs (11 +/- 6 L/h) and the endogenous PRs of F (0.6 +/- 0.3 mg/h) were both similar to those of nonobese men, but the MCR of F was directly correlated with the ratio of excreted cortisone to F metabolites (r = 0.7833, p = 0.012). DISCUSSION: These data demonstrate sex-specific differences in F metabolism in obesity. The rise in MCRs of F is more pronounced in obese women than in men. However, the increase in the MCR of F is moderate in both genders and exceeds the normal range only in a subgroup of obese individuals.
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