Neuronal correlates of sex/role change in labrid fishes: LHRH-like immunoreactivity.
Neuronal correlates of sex/role change in labrid fishes: LHRH-like immunoreactivity.
复制标题
拉布拉鱼性别/角色变化的神经元相关性：LHRH 样免疫反应性。
DOI：
10.1159/000114396
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Bass,AH
中科院分区：
文献类型：
--
作者：
Grober,MS;Bass,AH
促性腺激素在社会诱导的性和角色的变化在labrid鱼类的近端控制有牵连。由于促性腺激素的释放是由促性腺激素释放激素控制的，因此，本文采用免疫细胞化学技术来定性和定量测定促黄体生成素释放激素在大鼠卵巢中的分布本研究以双带锦鱼（Thalassoma bifasciatum）为研究对象，观察了其脑内促性腺激素释放激素（LHRH，哺乳动物中主要的促性腺激素释放激素）的分布。在嗅球、前脑的端脑背侧区和视前区、下丘脑的内侧后结节和血管囊核以及中脑的顶盖和被盖中有浓度。LHRH阳性细胞主要分布于终神经节的前、后区、视前区和中脑脑室周围吻侧。LHRH样免疫反应阳性细胞和纤维的分布在不同的性期之间无质的差异。然而，在视前区，LHRH样免疫反应细胞的数量有相当大的差异，该脑区被认为与成人的性发育和性生理及性行为的控制有关。基于此，以及其他硬骨鱼类的结果，唇裂鱼性逆转和替代生殖行为表达的中枢控制似乎与LHRH阳性胞体及其纤维投射的数量和/或生物合成活性的数量变化更直接相关。
Gonadotropins have been implicated in the proximate control of socially induced sex and role change in labrid fishes. Since the release of gonadotropins is controlled by Gonadotropin Releasing Hormones, immunocytochemical techniques were used here to determine the qualitative and quantitative distribution of Luteinizing Hormone Releasing Hormone (LHRH, the primary Gonadotropin Releasing Hormone in mammals) in the brain of a sex-reversing labrid fish,Thalassoma bifasciatum.Fibers showing LHRH-like immunoreactivity were distributed throughout the brain, with densest concentrations in the olfactory bulb, the telencephalic area dorsalis and preoptic area of the forebrain, the medial posterior tuber and nucleus of the saccus vasculosus of the hypothalamus, and the tectum and tegmentum of the midbrain. Somata positive for LHRH were found in the anterior and posterior divisions of the ganglion of the nervus terminalis, the preoptic area, and the periventricular rostral midbrain. There were noqualitativedifferences in the distribution of LHRH-like immunoreactive cells and fibers among the different sexual phases. However, there werequantitativedifferences in the number of LHRH-like immunoreactive cells in the preoptic area, a brain region known to be involved both in sexual development and in the control of sexual physiology and behavior in adults. Based on this, and results in other teleosts, it seems likely that central control of sex reversal and expression of alternative reproductive behaviors in labrid fishes is more directly related to quantitative changes in the number and/or biosynthetic activity of LHRH-positive somata and their fiber projections.