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瘦素(leptin)是近年发现的、由脂肪细胞分泌的一种肽类激素。它除可调节机体脂肪贮存、能量代谢外,还是下丘脑-垂体-性腺轴的调节激素之一,对青春期的发育、生殖器官的成熟以及第二性征的出现和维持具有重要作用。
Leptin is a peptide hormone secreted by fat cells in recent years. In addition to regulating body fat storage and energy metabolism, it is also one of the regulatory hormones of the hypothalamus-pituitary-gonad axis. It plays an important role in the development of puberty, the maturation of reproductive organs and the emergence and maintenance of secondary sexual signs.