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JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
Leptin and adiponectin levels in middle-aged postmenopausal women: associations with lifestyle habits, hormones, and inflammatory markers--a cross-sectional study.
Metabolism: Clinical and Experimental 2006 December
To investigate the relationships between blood levels of leptin or adiponectin and lifestyle habits, hormones, and inflammatory markers, we measured parameters of alcohol intake, smoking, physical activity, and blood levels of leptin, adiponectin, testosterone, estrone, estradiol, cortisol, dihydroepiandrostenedione, luteinizing hormone, thyroxin, C-reactive protein (CRP), and interleukin 6 and interleukin 2 receptor in 76 healthy middle-aged postmenopausal women. Anthropometric measures and body composition (evaluated by dual-energy x-ray absorptiometry) and lipid profiles were also assessed. By simple regression, leptin correlated positively with fat and lean masses, glucose, triglycerides, low-density lipoprotein cholesterol, and total cholesterol, and negatively with high-density lipoprotein cholesterol. Adioponectin correlated negatively with fat and lean masses and low-density lipoprotein cholesterol, and positively with high-density lipoprotein cholesterol. Leptin concentration was correlated inversely with adiponectin (r = -0.26, P < .05) and positively with CRP (r = 0.56, P < .01). Adiponectin concentration was negatively correlated with time since last alcoholic drink (r = -0.24, P < .05) and CRP (r = -0.27, P < .05) and positively with testosterone level (r = 0.23, P < .05). By multiple regression analysis, leptin concentration was predicted by age (P < .05), testosterone (P < .05), adiponectin (P < .05), CRP (P < .01), and interleukin 6 receptor (P < .01). Adiponectin concentration was predicted by the time since last alcoholic drink (P < .05), testosterone (P < .05), leptin (P < .05), and C-reactive protein (P = .05). Similar results were found when leptin or adiponectin concentration was adjusted for fat mass. These results suggested that levels of leptin and adiponectin in middle-aged postmenopausal women are partially determined by sexual hormones and inflammatory marker levels, and both predicted one another. Moreover, adiponectin level may be modulated by alcohol intake.
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