Changes in Specific Gonadotropin Binding Sites in the Liver during Metamorphosis in the Bullfrog, Rana catesbeiana(Endocrinology)
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概要
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The author studied bindings of radioiodinated bullfrog follicle-stimulating hormone (fFSH) and luteinizing hormone (fLH) to a crude plasma membrane fraction of the liver of tadpoles of various stages and adults of the bullfrog, Rana catesbeiana. Slight specific bindings of the labeled fFSH and fLH were detected in tadpoles between Stage V and XX. Specific bindings of the radioiodinated hormones increased significantly from Stage XXI, which is just after "climax" of metamorphosis. Furthermore, accumulation of 3'-5' cyclic adenosine monophosphate was stimulated by both fFSH and fLH in small blocks of the liver derived from individuals after the climax of metamorphosis but not in those derived from individuals before the climax. These results strongly suggest that, in bullfrogs after the climax of metamorphosis, gonadotropins act on the liver through specific membrane receptors coupled with the adenylate cyclase system, and stimulate some biochemical process in the liver.
- 社団法人日本動物学会の論文
- 1991-08-15
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- Changes in Specific Gonadotropin Binding Sites in the Liver during Metamorphosis in the Bullfrog, Rana catesbeiana(Endocrinology)