Is there any delta 5-3 beta hydroxysteroid dehydrogenase activity in preimplantation embryo of rhesus monkey?
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1989-05-01
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This is the first report on the histochemical assessment of delta 5-3 beta hydroxysteroid dehydrogenase activity in all the preimplantation embryonic stages in the rhesus monkey (Macaca mulatta). An apparent stage dependent increase in enzyme activity was obtained, however, distinctively a high degree of non-specificity in enzyme reaction was noted primarily in morulae and blastocysts. Such marked non-specificity in the histochemical enzyme reaction for delta 5-3 beta hydroxysteroid dehydrogenase activity was not found in mouse blastocysts. High amounts of endogenous steroids present within rhesus embryos, or the participation of non-specific dehydrogenases could account for the observed non-specificity. Furthermore, the present report documents the pattern and degree of association (r = 0.9; P less than 0.01) between developmental stage and gestational age of preimplantation rhesus embryos, and thus provides a normal in situ cell cleavage rate of preimplantation embryo in the rhesus monkey.
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Sengupta J, Talwar D, Paria BC, Ghosh D. Is there any delta 5-3 beta hydroxysteroid dehydrogenase activity in preimplantation embryo of rhesus monkey? Indian Journal of Experimental Biology. 1989 May; 27(5): 417-20