Neuroendocrine mechanisms that delay and initiate puberty in higher primates

被引:38
|
作者
Plant, TM [1 ]
Shahab, M [1 ]
机构
[1] Univ Pittsburgh, Sch Med, Dept Cell Biol & Physiol, Ctr Res Reprod Physiol, Pittsburgh, PA 15261 USA
关键词
neuroendocrine mechanisms; puberty; higher primates;
D O I
10.1016/S0031-9384(02)00924-1
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
This paper highlights a series of studies using the male rhesus monkey that has led to a model for the control of the onset of puberty in higher primates. The model proposes that the timing of puberty in these species is governed by the duration of a central brake that, during juvenile development, holds in check the hypothalamic network of gonadotropin-releasing hormone (GnRH) neurons, which, in the adult, drive the pituitary-gonadal axis. The neurobiology of this hypothalamic brake, and the physiological mechanisms that time its application and removal, are incompletely understood. Nevertheless, the pubertal resurgence of pulsatile GnRH release, which terminates the juvenile phase of primate development and triggers the initiation of puberty in man and monkeys, is associated with structural and molecular remodeling of the hypothalamus. A major component of this developmental plasticity appears to involve neuropeptide Y (NPY). NPY inhibits GnRH release, and NPY gene expression in the hypothalamus is elevated during juvenile development when GnRH release is restrained. Since the changes in hypothalamic function and morphology that trigger primate puberty unfold in the absence of gonadal steroid feedback, the possibility is raised that, in addition to activating the pituitary-gonadal axis at this stage of development, they may also contribute directly to the causation of behaviors and affective states that emerge at adolescence. (C) 2002 Elsevier Science Inc. All rights reserved.
引用
收藏
页码:717 / 722
页数:6
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