VOPROSY MEDITSINSKOI KHIMII (ISSN 0042-8809)

Activity of 5-alpha- and 5-beta-steroid reductases in subcellular liver structures from rats bearing Walker carcinosarcoma

   
Ulinskaĭte A.P., Krauialis K.I., Diashrius A.P.
PubMed Id: 2741400
Year: 1989  Volume: 35  Issue: 1  Pages: 77-81
Change in the activity of cytoplasmic 5 beta- and microsomal 5 alpha-steroid reductases was studied in tumor bearing rats. As shown by thin-layer chromatography conversion of 3H-corticosterone into 5-alpha and 5 beta-dihydro-compounds was decreased 3-fold in rats bearing Walker tumor. Activity of both these enzymes exceeded the initial level 2-3-fold in presence of exogenous NADPH. At the same time, activation of glucose 6-phosphate dehydrogenase was accompanied by simultaneous alteration in content of transcortin-bound corticosterone in rat blood plasma. 5 alpha-reductase was detected in membranes of liver tissue endoplasmic reticulum and in the fraction of free polyribosomes.
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Ulinskaĭte, A. P., Krauialis, K. I., Diashrius, A. P. (1989). Activity of 5-alpha- and 5-beta-steroid reductases in subcellular liver structures from rats bearing Walker carcinosarcoma. Voprosy Meditsinskoi Khimii, 35(1), 77-81.
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