Abstract
17α-ethinylestradiol (EE2) is a widely existed endocrine disrupting chemical in water environment. Kisspeptins act as indispensable regulators through GPR54 in the hypothalamic–pituitary–gonadal (HPG) axis. This study aimed to provide further understanding of the effect of EE2 on HPG axis. Molecular cloning and tissue distribution of kiss genes and GPR54s were performed in Gobiocypris rarus. The mRNA expression profiles of kiss1, kiss2, GPR54s and GnRHs were detected in G. rarus brain and/or gonad following 3- and 6-days EE2 (1, 5, 25 and 125 ng/L) exposure. Results showed that kiss genes and GPR54s were highly expressed in brain and gonad. Both kiss1 and kiss2 were increased in female brain and suppressed in male brain following EE2 exposure. GnRHs were inhibited in a concentration-dependent manner in male brain following 3-days EE2 exposure. In gonad, GPR54b was almost suppressed in all of EE2 concentrations. The present findings suggest that EE2 impacts the genes expression of Kiss/GPR54-GnRH system in G. rarus, thereby probably disturbing the neuroendocrine homeostasis.
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This study was supported by grant from the National Natural Science Foundation of China (31270547).
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Yang, Y., Gao, J., Yuan, C. et al. Molecular identification of Kiss/GPR54 and function analysis with mRNA expression profiles exposure to 17α-ethinylestradiol in rare minnow Gobiocypris rarus . Mol Biol Rep 43, 737–749 (2016). https://doi.org/10.1007/s11033-016-4014-y
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DOI: https://doi.org/10.1007/s11033-016-4014-y