Abstract
Interrenal-like tissue in male African catfish is localized in paired organs, situated retroperitoneally anterior of the kidney. Histological and enzyme-histochemical (3β-hydroxysteroid dehydrogenase) reactions were carried out on sections of these organs in order to localize steroid-producing cells. In vitro incubations were carried out to determine the steroidogenic capacity of the interrenal-like tissue. Twenty-one steroids could be identified and quantified in the incubation medium, by means of gas chromatography followed by mass spectrometry. Cortisol, 5α-and 5β-androstanedione and androstenedione together comprised about 80% of the total steroid content. In a previous study, twenty testicular steroids were detected in plasma after castration. In the present investigation we have shown that most of these steroids can be produced by the interrenal-like tissue, which thus can be considered as an extra-testicular source of gonadal steroids.
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Vermeulen, G.J., Lambert, J.G.D., Teitsma, C.A. et al. Adrenal tissue in the male African catfish, Clarias gariepinus: localization and steroid hormone secretion. Cell Tissue Res 280, 653–657 (1995). https://doi.org/10.1007/BF00318367
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DOI: https://doi.org/10.1007/BF00318367