Molecular characterization of Kiss2 receptor and in vitro effects of Kiss2 on reproduction-related gene expression in the hypothalamus of half smooth tongue sole (Cynoglossus semilaevis)

文献类型： 外文期刊

第一作者： Wang, Bin

作者： Wang, Bin;Liu, Quan;Liu, Xuezhou;Xu, Yongjiang;Shi, Bao;Wang, Bin;Liu, Xuezhou;Xu, Yongjiang;Shi, Bao;Liu, Quan

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关键词： Kisspeptin;Kisspeptin receptor;cDNA cloning;Hypothalamus;Cynoglossus semilaevis

期刊名称：GENERAL AND COMPARATIVE ENDOCRINOLOGY （ 影响因子：2.822； 五年影响因子：2.772 ）

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收录情况： SCI

摘要： Kisspeptin (Kiss) and its receptor, KissR (previously known as GPR54), play a critical role in the control of reproduction and puberty onset in mammals. Additionally, a number of studies have provided evidence of the existence of multiple Kiss/KissR systems in teleosts, but the physiological relevance and functions of these kisspeptin forms (Kiss1 and Kiss2) still remain to be investigated. To this end, we examined the direct actions of Kiss2 on hypothalamic functions in the half-smooth tongue sole (Cynoglossus semilaevis), a representative species of the order Pleuronectiformes. As a first step, the full-length cDNA for kiss2r was identified and kiss2r transcripts were shown to be widely expressed in various tissues, notably in the brain of tongue sole. Then, the effects of Kiss2 decapeptide on reproduction-related gene expression were evaluated using a primary hypothalamus culture system. Our results showed that neither gnrh2 nor gnrh3 mRNA levels were altered by Kiss2. However, Kiss2 significantly increased the amounts of gnih and kiss2 mRNAs. In contrast, Kiss2 elicited an evident inhibitory effect on both gnihr and kiss2r mRNA levels. To the best of our knowledge, this is the first description of a direct and differential regulation of reproduction-related gene expression by Kiss2 at the hypothalamus level of a teleost fish. Overall, this study provides novel information on the role of Kiss2/Kiss2R system in the reproductive function of teleosts. (C) 2017 Elsevier Inc. All rights reserved.

分类号： R58

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