Journal ArticleDOI
Leydig cell and delta 5-3 beta-hydroxysteroid dehydrogenase activity in the testis of toad (Bufo melanostictus) following cold exposure.
P. B. Patra,N. M. Biswas +1 more
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TLDR
Leydig cell nuclear area and 5-3β-hydroxysteroid dehydrogenase activity were increased in the testis of Bufo melanostictus 2 days after a single short-term cold exposure and returned to normal values 4 days later.Abstract:
Leydig cell nuclear area andΔ5-3β-hydroxysteroid dehydrogenase activity were increased in the testis ofBufo melanostictus 2 days after a single short-term cold exposure. Both parameters returned to normal values 4 days later.read more
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Quantitative evaluation of spermatogenesis in mice following chronic exposure to cannabinoids.
P. B. Patra,R. M. Wadsworth +1 more
TL;DR: Although the total number of step 7 spermatids was unaltered, mature spermatozoa recovered from the cauda epididymidis showed severe abnormalities in morphology, most of the activity of the crude extract being attributable to CBN and CBD.
Journal ArticleDOI
Studies on some enzymes of the toad (Bufo melanostictus) testis and their probable role at the time of fertilization
M. S. Shylaja,H. S. Seshadri +1 more
TL;DR: The glycosidases were found to act on toad oviduct jelly and they may therefore be involved in the degradation of the jelly after fertilization, into smaller bits, which may be utilized as nutrients by the fertilized zygote.
References
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Journal ArticleDOI
Visualization of steroid-3beta-o1-dehydrogenase activity in tissues of intact and hypophysectomized rats.
TL;DR: Dehydrogenation of dehydroepiandrosterone, a 3β-hydroxysteroid, is demonstrable in all types of steroid-producing cells in the rat adrenal gland, ovary and testis, as well as in some of the oviduct epithelium, when sections are incubated in a phosphate buffer.
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An enzyme in endocrine tissues which oxidizes 5-3 hydroxy steroids to delta 5-3 unsaturated ketones.
Journal ArticleDOI
Trophoblastic giant cells in placentas of rats and mice and their probable role in steroid-hormone production.
TL;DR: Other features of the giant cells indicating their function in the production of steroid hormones are a conspicuous amount of cytoplasmic lipid and a high capacity for making reduced triphosphopyridine nucleotide (TPNH) as a result of oxidation of glucose-6-phosphate.
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Seasonal changes in the functional activity of the interstitial and spermatogenetic tissues of the green frog, rana esculenta.
TL;DR: The testes of Rana esculenta display a well-marked seasonal variation not only in their spermatogenetic activity, but also in the cyclical appearance and disappearance of cholesterol-positive lipids from the interstitial and Sertoli cells.
Journal ArticleDOI
Bioconversion of steroids in immature rat testes in vitro.
Hiroshi Inano,Bun-Ichi Tamaoki +1 more
TL;DR: The enzymic pattern unique to the testes of immature rats would seem to be the significantly strong activities of the Δ4- androstene and -pregnene-5α-reductase, the 5α-androstane-3-dione, and 3β-hydroxy- 5 α-androstan-17-one as metabolites of both substrates.