Changes in sex hormone-binding globulin and testosterone during weight loss and weight maintenance in abdominally obese men with the metabolic syndrome Export

@article{citeulike:6057695, abstract = {Background: Mild hypoandrogenism in men, usually defined by low levels of testosterone, is a peculiar feature of abdominal obesity that independently predicts the development of insulin resistance and diabetes mellitus. Little is known about the short- and long-term effects of weight loss on sex steroids in abdominally obese men, however.Objectives:  We assessed the effect of rapid weight loss and sustained weight maintenance on the plasma concentrations of testosterone and other sex hormones in 58 abdominally obese men (age, 46.3 ± 7.5 years; body mass index, 36.1 ± 3.8 kg/m2; waist girth, 121 ± 10 cm) with the metabolic syndrome.Results:  The men lost on average 16.3 ± 4.5 kg during a 9-week very low-calorie diet (VLCD) and maintained 14.3 ± 9.1 kg weight loss after a 12-month maintenance period (vs. baseline, p \< 0.001). Sex hormone-binding globulin (SHBG) increased from 27.6 ± 11.9 to 48.1 ± 23.5 nmol/l during the VLCD but decreased to 32.6 ± 12.9 nmol/l during weight maintenance, which was still higher than at baseline (p \< 0.001). Free testosterone (fT) increased from 185 ± 66 to 208 ± 70 pmol/l (p = 0.002) during the VLCD and remained high after 1 year of weight maintenance (212 ± 84 pmol/l, p = 0.002). Total testosterone levels followed a pattern intermediate between fT and SHBG. Plasma estradiol and dehydroepiandrosterone sulphate concentrations changed only transiently or not at all.Conclusions:  Rapid weight loss with successful weight maintenance in abdominally obese men with the metabolic syndrome brings about a sustained increase in fT levels. The dramatic increase in SHBG attenuated initially during weight maintenance but remained elevated. These findings may be important with regard to prevention of progressive metabolic decompensation and cardiovascular disease associated with obesity and the metabolic syndrome.}, address = {Department of Medicine, Kuopio University Hospital, Kuopio, Finland; Department of Clinical Chemistry, Kuopio University Hospital, Kuopio, Finland; Department of Medicine, Peijas Hospital, Vantaa, Finland; Obesity Research Center and Helsinki University Hospital, Helsinki, Finland}, author = {Niskanen, L. and Laaksonen, D. E. and Punnonen, K. and Mustajoki, P. and Kaukua, J. and Rissanen, A.}, citeulike-article-id = {6057695}, citeulike-linkout-0 = {http://dx.doi.org/10.1111/j.1462-8902.2004.00335.x}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/118811603/ABSTRACT}, doi = {10.1111/j.1462-8902.2004.00335.x}, issn = {1463-1326}, journal = {Diabetes, Obesity and Metabolism}, keywords = {human, loss, men, metabolic, obesity, shbg, testosterone, weight}, number = {3}, pages = {208--215}, posted-at = {2009-11-02 23:37:20}, priority = {2}, title = {Changes in sex hormone-binding globulin and testosterone during weight loss and weight maintenance in abdominally obese men with the metabolic syndrome}, url = {http://dx.doi.org/10.1111/j.1462-8902.2004.00335.x}, volume = {6}, year = {2004} }

TY - JOUR ID - citeulike:6057695 L3 - citeulike-article-id:6057695 N2 - Background: Mild hypoandrogenism in men, usually defined by low levels of testosterone, is a peculiar feature of abdominal obesity that independently predicts the development of insulin resistance and diabetes mellitus. Little is known about the short- and long-term effects of weight loss on sex steroids in abdominally obese men, however.Objectives:  We assessed the effect of rapid weight loss and sustained weight maintenance on the plasma concentrations of testosterone and other sex hormones in 58 abdominally obese men (age, 46.3 ± 7.5 years; body mass index, 36.1 ± 3.8 kg/m2; waist girth, 121 ± 10 cm) with the metabolic syndrome.Results:  The men lost on average 16.3 ± 4.5 kg during a 9-week very low-calorie diet (VLCD) and maintained 14.3 ± 9.1 kg weight loss after a 12-month maintenance period (vs. baseline, p < 0.001). Sex hormone-binding globulin (SHBG) increased from 27.6 ± 11.9 to 48.1 ± 23.5 nmol/l during the VLCD but decreased to 32.6 ± 12.9 nmol/l during weight maintenance, which was still higher than at baseline (p < 0.001). Free testosterone (fT) increased from 185 ± 66 to 208 ± 70 pmol/l (p = 0.002) during the VLCD and remained high after 1 year of weight maintenance (212 ± 84 pmol/l, p = 0.002). Total testosterone levels followed a pattern intermediate between fT and SHBG. Plasma estradiol and dehydroepiandrosterone sulphate concentrations changed only transiently or not at all.Conclusions:  Rapid weight loss with successful weight maintenance in abdominally obese men with the metabolic syndrome brings about a sustained increase in fT levels. The dramatic increase in SHBG attenuated initially during weight maintenance but remained elevated. These findings may be important with regard to prevention of progressive metabolic decompensation and cardiovascular disease associated with obesity and the metabolic syndrome. IS - 3 JF - Diabetes, Obesity and Metabolism SN - 1463-1326 AD - Department of Medicine, Kuopio University Hospital, Kuopio, Finland; Department of Clinical Chemistry, Kuopio University Hospital, Kuopio, Finland; Department of Medicine, Peijas Hospital, Vantaa, Finland; Obesity Research Center and Helsinki University Hospital, Helsinki, Finland EP - 215 TI - Changes in sex hormone-binding globulin and testosterone during weight loss and weight maintenance in abdominally obese men with the metabolic syndrome VL - 6 SP - 208 KW - human KW - loss KW - men KW - metabolic KW - obesity KW - shbg KW - testosterone KW - weight AU - Niskanen, L AU - Laaksonen, DE AU - Punnonen, K AU - Mustajoki, P AU - Kaukua, J AU - Rissanen, A PY - 2004/// UR - http://dx.doi.org/10.1111/j.1462-8902.2004.00335.x ER -