The histochemical distribution of hydroxysteroid dehydrogenases in the human foetal membranes at term |
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Authors: | D. McKay Hart |
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Affiliation: | (1) Department of Anatomy, University of Glasgow, Scotland |
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Abstract: | Summary The histochemical distribution of various hydroxysteroid dehydrogenases in human, term, foetal membranes has been investigated using the tetrazolium dye, Nitro-B.T.The trophoblastic layer was the most active, showing 3-, 3-, 11-, 16- and 17-hydroxysteroid dehydrogenase activities, a pattern of activity similar to that of the placental villous trophoblast.The amniotic epithelium showed weak 3-, 3-, 16- and 17-hydroxysteroid dehydrogenase activity; weak 3- and 3-hydroxysteroid dehydrogenase activity was noted in the connective tissue layers.All activity demonstrated was N.A.D.-linked. |
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