Steroidogenesis by ovaries and testes of the European catfish,the wels (Silurus glanis), in vitro |
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| Authors: | David E Kime Shelley Bhattacharya Malgorzata Koldras Krzysztof Bieniarz |
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| Institution: | (1) Department of Animal and Plant Sciences, The University of Sheffield, Sheffield, S10 2UQ, United Kingdom;(2) Inland Fisheries Research Institute, Zator, Poland;(3) Department of Icthyobiology and Fisheries, Academy of Agriculture, Krakow-Mydlniki, Poland;(4) Present address: Department of Zoology, Visva Bharati University, Santiniketan, West Bengal, India;(5) Department of Animal and Plant Sciences, The University, Sheffield, S10 2UQ, United Kingdom |
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| Abstract: | Testosterone, 3 ,17-dihydroxy-5 -pregnen-20-one, 17,20-dihydroxy-4-pregnen-3-one (17,20P) and 5-pregnane-3,17,20-triol were identified as the major metabolites of 3H] 17-hydroxyprogesterone in ovarian incubations of the European catfish Silurus glanis. 17,20P and the reduced triol were present only in ovaries from fish primed with carp hypophysial homogenate (chh) while testosterone yields were significantly higher in controls than in treated fish. 11-Ketotestosterone, 11-hydroxytestosterone and 17,20-dihydroxy-4-pregnen-3-one (17,20P) were identified as the major metabolites of 3H]17-hydroxyprogesterone in in vitro incubations of testes of a spermiating catfish. There was no significant production of conjugates or other water soluble metabolites by either sex. The stimulation of plasma 17,20P, 17,20P and 11-hydroxytestosterone by chh in primed but not control males suggests that the role of these steroids in spermiation should be further examined. |
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| Keywords: | catfish ovary testis Silurus glanis steroids |
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