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- W2774918138 abstract "// Shou-Long Deng 1, * , Yan Zhang 1, * , Kun Yu 2, * , Xiu-Xia Wang 1 , Su-Ren Chen 1 , De-Ping Han 2 , C. Yan Cheng 3 , Zheng-Xing Lian 2 and Yi-Xun Liu 1 1 State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China 2 Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, P.R. China 3 The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, NY 10065, USA * These authors have contributed equally to this work Correspondence to : Yi-Xun Liu, email: liuyx@ioz.ac.cn Zheng-Xing Lian, email: lianzhx@cau.edu.cn Keywords: melatonin; RORα; steroid hormone; GATA-4; goat Received: September 26, 2017 Accepted: November 13, 2017 Published: December 01, 2017 ABSTRACT Because androgen function is regulated by its receptors, androgen-androgen receptor signaling is crucial for regulating spermatogenesis. Androgen is mainly testosterone secreted by testis. Based on the results of early studies in goats, the administration of melatonin over an extended period of time increases steroid production, but the underlying mechanism remains unclear. Here, we report the expression of the melatonin membrane receptors MT1 and MT2 and the retinoic acid receptor-related orphan receptor-alpha (RORα) in the goat testis. An in vitro differentiation system using spermatogonial stem cells (SSCs) cultured in the presence of testicular somatic cells was able to support the formation of sperm-like cells with a single flagellum. The addition of 10 -7 M melatonin to the in vitro culture system increased RORα expression and considerably improved the efficiency of haploid cell differentiation, and the addition of the RORα agonist CGP52608 significantly increased the testosterone concentration and expression of GATA binding factor 4 (GATA-4). Furthermore, inhibitors of melatonin membrane receptors and a RORα antagonist (T0901317) also led to a considerable reduction in the efficiency of haploid spermatid formation, which was coupled with the suppression of GATA-4 expression. Based on these results, RORα may play a crucial role in enhancing melatonin-regulated GATA-4 transcription and steroid hormone synthesis in the goat spermatogonial stem cell differentiation culture system." @default.
- W2774918138 created "2017-12-22" @default.
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- W2774918138 date "2017-12-01" @default.
- W2774918138 modified "2023-10-16" @default.
- W2774918138 title "Melatonin up-regulates the expression of the GATA-4 transcription factor and increases testosterone secretion from Leydig cells through RORα signaling in an <i>in vitro</i> goat spermatogonial stem cell differentiation culture system" @default.
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