PMID- 28438528 OWN - NLM STAT- MEDLINE DCOM- 20171106 LR - 20181202 IS - 1095-6840 (Electronic) IS - 0016-6480 (Linking) VI - 249 DP - 2017 Aug 1 TI - 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). PG - 55-63 LID - S0016-6480(17)30264-2 [pii] LID - 10.1016/j.ygcen.2017.04.006 [doi] AB - 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. CI - Copyright (c) 2017 Elsevier Inc. All rights reserved. FAU - Wang, Bin AU - Wang B AD - Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China. FAU - Liu, Quan AU - Liu Q AD - Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China. FAU - Liu, Xuezhou AU - Liu X AD - Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China. Electronic address: liuxz@ysfri.ac.cn. FAU - Xu, Yongjiang AU - Xu Y AD - Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China. FAU - Shi, Bao AU - Shi B AD - Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China. LA - eng PT - Journal Article DEP - 20170421 PL - United States TA - Gen Comp Endocrinol JT - General and comparative endocrinology JID - 0370735 RN - 0 (DNA, Complementary) RN - 0 (Kisspeptins) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Cell Surface) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Cloning, Molecular MH - DNA, Complementary/genetics MH - Female MH - Flatfishes/*genetics MH - Gene Expression Profiling MH - *Gene Expression Regulation MH - Hypothalamus/*metabolism MH - Kisspeptins/*genetics/metabolism MH - Phylogeny MH - RNA, Messenger/genetics/metabolism MH - Receptors, Cell Surface/chemistry/*genetics/metabolism MH - Reproduction/*genetics MH - Sequence Alignment MH - Sexual Maturation OTO - NOTNLM OT - Cynoglossus semilaevis OT - Hypothalamus OT - Kisspeptin OT - Kisspeptin receptor OT - cDNA cloning EDAT- 2017/04/26 06:00 MHDA- 2017/11/07 06:00 CRDT- 2017/04/26 06:00 PHST- 2016/12/26 00:00 [received] PHST- 2017/03/12 00:00 [revised] PHST- 2017/04/10 00:00 [accepted] PHST- 2017/04/26 06:00 [pubmed] PHST- 2017/11/07 06:00 [medline] PHST- 2017/04/26 06:00 [entrez] AID - S0016-6480(17)30264-2 [pii] AID - 10.1016/j.ygcen.2017.04.006 [doi] PST - ppublish SO - Gen Comp Endocrinol. 2017 Aug 1;249:55-63. doi: 10.1016/j.ygcen.2017.04.006. Epub 2017 Apr 21.