Comparative Studies of Ecdysteroid Metabolism between Diapause Eggs and Non-diapause Eggs of the Silkworm, Bombyx mori(Reproductive Biology)
スポンサーリンク
概要
- 論文の詳細を見る
2, 22, 25-Trideoxyecdysone (5β-ketodiol) has been shown to be derived from cholesterol in eggs of the silkworm, Bombyx mori. In order to investigate the difference in ecdysteroid metabolism between diapause eggs and non-diapause eggs of the silkworm, ^3H-5β-ketodiol was microinjected into eggs at several stages of early embryogenesis, and the metabolites were characterized using high-performance liquid chromatography. The injected ^3H-5β-ketodiol was metabolized not only to free ecdysteroids, but also to conjugates (phosphoric esters of ecdysteroids), in both diapause eggs and non-diapause eggs. Among these metabolites, 20-hydroxyecdysone, which is considered as the active hormone in silkworm eggs, was detected in non-diapause eggs. However, in diapause eggs, various radioactive putative precursors of 20-hydroxyecdysone, such as 2, 22-dideoxyecdysone, 2-deoxyecdysone and ecdysone, were detectable, but ^3H-20-hydroxyecdysone was not found. These results suggest that the 20-hydroxylation of ecdysone, which is catalyzed by ecdysone 20-monooxygenase, may be a rate-limiting step in the formation of 20-hydroxyecdysone from ketodiol in the silkworm eggs.
- 社団法人日本動物学会の論文
- 1999-12-15
著者
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Sonobe Haruyuki
Department of Biology, Faculty of Science and Engineering, Konan University
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HARA Noriyuki
Department of Chemistry and Materials Science, Tokyo Institute of Technology
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FUJIMOTO Yoshinori
Department of Chemistry and Materials Science, Tokyo Institute of Technology
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Hara Noriyuki
Department Of Chemistry And Materials Science Tokyo Institute Of Technology
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Hara Noriyuki
Department Of Chemistry Tokyo Institute Of Technology
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Tsutsumi Hibiki
Department of Biology, Faculty of Science, Konan University
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Sonobe H
Konan Univ. Kobe Jpn
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Sonobe Haruyuki
Department Of Biophysical Chemistry Kobe Pharmaceutical University
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Fujimoto Yoshinori
Department Of Chemistry And Material Science Tokyo Institute Of Technology
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Sonobe Haruyuki
Department Of Biology Faculty Of Liberal Arts And Science Yamagata University
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Fujimoto Y
Department Of Chemistry And Materials Science Tokyo Institute Of Technology
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Makka Toshihiro
Department of Life and Functional Material Science, Konan University
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Tokushige Hideki
Department of Biology, Konan University
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Tokushige Hideki
Department Of Biology Konan University
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Tsutsumi Hibiki
Department Of Biology Konan University
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Makka T
Department Of Life And Functional Material Science Konan University
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Makka Toshihiro
Department Of Biology Konan University
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SAITO Hiroyuki
The University of Tokushima
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