Journal
HORMONES-INTERNATIONAL JOURNAL OF ENDOCRINOLOGY AND METABOLISM
Volume 12, Issue 3, Pages 405-416Publisher
SPRINGER
DOI: 10.1007/BF03401306
Keywords
Estradiol; Free androgen index; Insulin resistance; Metabolic syndrome; Nonalcoholic fatty liver disease; Nonalcoholic steatohepatitis; Sex hormone-binding globulin; Testosterone
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OBJECTIVE: The evaluation of serum sex steroids and sex hormone-binding globulin (SHBG) levels in postmenopausal women with nonalcoholic fatty liver disease (NAFLD) and their association to the disease severity. DESIGN: Twenty-two postmenopausal women with biopsyproven NAFLD and 18 matched controls were recruited. Blood samples for serum SHBG, total testosterone, estradiol levels and standard biochemical tests were obtained after overnight fasting. Free androgen index (FAI), calculated free (cFT) and bioavailable testosterone were estimated by standard formulas. RESULTS: The NAFLD group had lower serum SHBG levels and higher values of cFT, bioavailable testosterone and FAI, despite exhibiting similar to controls levels of serum total testosterone and estradiol. Serum SHBG levels (adjusted odds ratio [aOR]=0.912; 95% CI 0.854-0.973), bioavailable testosterone (aOR=1.254; 95% CI 1.010-1.556) and FAI (aOR=2.567; 95% CI 1.153-5.716), but not cFT, were associated with NAFLD independently of age, body mass index (BMI) and waist circumference. Serum estradiol levels were associated with the presence of nonalcoholic steatohepatitis (NASH) independently of age, BMI and waist circumference (aOR=0.727; 95% CI 0.537-0.985). CONCLUSIONS: Low SHBG levels and high metabolically active testosterone fractions were independently associated with NAFLD. Among NAFLD patients, serum estradiol levels were independently associated with NASH. However, these results need further validation from large-scale studies.
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