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Conditional kisspeptin neuron-specific Kiss1 knockout with newly generated Kiss1-floxed and Kiss1-Cre mice replicates a hypogonadal phenotype of global Kiss1 knockout mice
Journal of Reproduction and Development ( IF 1.9 ) Pub Date : 2020-01-01 , DOI: 10.1262/jrd.2020-026
Kana Ikegami 1 , Teppei Goto 1, 2 , Sho Nakamura 3 , Youki Watanabe 1 , Arisa Sugimoto 1 , Sutisa Majarune 1 , Kei Horihata 1 , Mayuko Nagae 1 , Junko Tomikawa 1 , Takuya Imamura 4 , Makoto Sanbo 2 , Masumi Hirabayashi 2 , Naoko Inoue 1 , Kei-Ichiro Maeda 3 , Hiroko Tsukamura 1 , Yoshihisa Uenoyama 1
Affiliation  

The present study aimed to evaluate whether novel conditional kisspeptin neuron-specific Kiss1 knockout (KO) mice utilizing the Cre-loxP system could recapitulate the infertility of global Kiss1 KO models, thereby providing further evidence for the fundamental role of hypothalamic kisspeptin neurons in regulating mammalian reproduction. We generated Kiss1-floxed mice and hypothalamic kisspeptin neuron-specific Cre-expressing transgenic mice and then crossed these two lines. The conditional Kiss1 KO mice showed pubertal failure along with a suppression of gonadotropin secretion and ovarian atrophy. These results indicate that newly-created hypothalamic Kiss1 KO mice obtained by the Cre-loxP system recapitulated the infertility of global Kiss1 KO models, suggesting that hypothalamic kisspeptin, but not peripheral kisspeptin, is critical for reproduction. Importantly, these Kiss1-floxed mice are now available and will be a valuable tool for detailed analyses of roles of each population of kisspeptin neurons in the brain and peripheral kisspeptin-producing cells by the spatiotemporal-specific manipulation of Cre expression.

中文翻译:

使用新生成的Kiss1- floxed 和Kiss1- Cre 小鼠的条件性kisspeptin 神经元特异性Kiss1敲除复制了全球Kiss1敲除小鼠的性腺功能减退表型

本研究旨在评估利用 Cre-loxP 系统的新型条件性 Kisspeptin 神经元特异性 Kiss1 敲除 (KO) 小鼠是否可以重现全球 Kiss1 KO 模型的不孕症,从而为下丘脑 Kisspeptin 神经元在调节哺乳动物细胞中的基本作用提供进一步的证据。再生产。我们生成了 Kiss1-floxed 小鼠和下丘脑 Kisspeptin 神经元特异性 Cre 表达转基因小鼠,然后越过这两条线。条件性 Kiss1 KO 小鼠表现出青春期衰竭以及促性腺激素分泌和卵巢萎缩的抑制。这些结果表明,由 Cre-loxP 系统获得的新创建的下丘脑 Kiss1 KO 小鼠重现了全球 Kiss1 KO 模型的不孕症,表明下丘脑 Kisspeptin,而不是外周 Kisspeptin,对繁殖至关重要。重要的是,这些 Kiss1-floxed 小鼠现已上市,并且将成为通过 Cre 表达的时空特异性操作详细分析大脑中每个 Kisspeptin 神经元群体和外周产生 Kisspeptin 细胞的作用的宝贵工具。
更新日期:2020-01-01
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