Steroidogenesis in Ovarian Follicles of Chub Mackerel, Scomber japonicus(Reproductive Biology)
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概要
- 論文の詳細を見る
We incubated different radiolabeled steroid precursors with intact chub mackerel ovarian follicles to clarify the synthetic pathways of steroid hormones during vitellogenesis and following final oocyte maturation (FOM). During vitellogenesis, estradiol-17β (E2) was synthesized from pregnenolone via 17-hydroxypregnenolone, 17-hydroxyprogesterone, androstenedione, and testosterone. The physiological significance of the intermediate metabolites of E2 in the ovarian follicles was examined by comparing follicular steroidogenesis between gonochoric and hermaphroditic fish species. After vitellogenesis, the steroidogenetic pathway shifted from E2 to maturation-including hormone (MIH) production owing to the inactivation of 17,20-lyase and the activation of 20β-hydroxysteroid dehydrogenase. Of the new steroids produced during FOM, 17,20*-dihydroxy-4-pregnen-3-one (17,20β-P) was most effective at including germinal vesicle bearkdown in vitro. circulating levels of 17,20β-P increased specifically around the time of germinal vesicle migration, while another FOM-specific 20β-hydroxylated progestin, 17,20β-P is the MIH of chub mackerel.
- 社団法人日本動物学会の論文
- 2005-01-25
著者
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MATSUYAMA MICHIYA
Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University
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YAMAGUCHI AKIHIKO
Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University
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SHIRAISHI TETSURO
Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University
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OHTA KOHEI
Laboratory of Marine Biology, Faculty of Agriculture, Kyushu University
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RAHMAN Md.
Laboratory of Microbiology, Graduate School of Fisheries Sciences, Hokkaido University
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Ohta Kohei
Cyber Solutions Inc.
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Ohta Kohei
Laboratory Of Marine Biology Faculty Of Bioresource And Bioenvironmental Sciences Kyushu University
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Ohta Kazuyoshi
Department Of Agricultural Chemistry
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Rahman Md.
Laboratory Of Marine Biology Faculty Of Bioresource And Bioenvironmental Sciences Kyushu University
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Sundaray Jitendra
Laboratory of Marine Biology, Faculty of Bioresource and Bioenvironmental Sciences, Kyushu Universit
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Sundaray Jitendra
Laboratory Of Marine Biology Faculty Of Bioresource And Bioenvironmental Sciences Kyushu University
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Ohta Kohei
Laboratory Of Marine Biology Division Of Marine Bioresources Department Of Animal And Marine Bioreso
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Matsuyama M
Laboratory Of Marine Biology Faculty Of Agriculture Kyushu University
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Yamaguchi Akihiko
Laboratory Of Marine Biology Faculty Of Agriculture Kyushu University
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Yamaguchi Akihiko
Laboratory Of Genetics Department Of Regulation Biology Faculty Of Science Saitama University
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Matsuyama Michiya
Laboratory Of Marine Bioresources Department Of Animal And Marine Bioresource Science Faculty Of Agr
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Shiraishi Tetsuro
Laboratory Of Marine Biology Faculty Of Agriculture Kyushu University
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Sakai Takeshi
Seikai National Fisheries Research Institute Fisheries Research Agency (fra)
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