期刊
EUROPEAN JOURNAL OF ENDOCRINOLOGY
卷 165, 期 2, 页码 249-254出版社
BIOSCIENTIFICA LTD
DOI: 10.1530/EJE-11-0252
关键词
-
资金
- National Institutes of Health [F32 DK6455001A1, DK081913, DK79929, DK58785, AG032030]
- European Union [202579]
- Telethon-JDRF [GJT08004]
- Beth Israel Deaconess Medical Center. Amgen, Inc.
Objective: Short-term energy deprivation reduces leptin concentrations and alters the levels of circulating hormones of the hypothalamic-pituitary-peripheral axis in lean subjects. Whether the reduction in leptin concentration during long-term weight loss in obese individuals is linked to the same neuroendocrine changes seen in lean, leptin-sensitive subjects remains to be fully clarified. Methods: In this study, 24 overweight and obese adults (16 women and eight men; body mass index (BMI): 27.5-38.0 kg/m(2)) were prescribed a hypocaloric diet (-500 kcal/day) and were randomized to receive recombinant methionyl leptin (n = 18, metreleptin, 10 mg/day self-injected s.c.) or placebo (n = 6, same volume and time as metreleptin) for 6 months. Results: Metreleptin administration did not affect weight loss beyond that induced by hypocaloric diet alone (P for interaction = 0.341) but increased the serum concentrations of total leptin by six-to eight-fold (P<0.001) and led to the generation of anti-leptin antibodies. Despite free leptin concentration (P for interaction = 0.041) increasing from 9 +/- 1 ng/ml at baseline to 43 +/- 15 and 36 +/- 12 ng/ml at 3 and 6 months, respectively, changes in circulating hormones of the thyroid and IGF axes at 3 and 6 months were not significantly different in the placebo-and metreleptin-treated groups. Conclusions: Leptin does not likely mediate changes in neuroendocrine function in response to weight loss induced by a mild hypocaloric diet in overweight and obese subjects.
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