A Boos, H G Hülsmann, W Meyer, I Peukert-Adam, R Schwarz, E Grunert
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A quantitative histochemical study of delta 5-3 beta-hydroxysteroid dehydrogenase and succinate dehydrogenase activities in the bovine corpus luteum of pregnancy.
In corpora lutea of pregnancy of dairy cows delta 5-3 beta-hydroxysteroid dehydrogenase and succinate dehydrogenase were demonstrated histochemically and evaluated densitometrically. Serum progesterone was determined radioimmunologically. Activities per volume unit of delta 5-3 beta-hydroxysteroid dehydrogenase and succinate dehydrogenase in large and small luteal cells as well as progesterone concentrations, exhibited no typical and correlated pattern during pregnancy. Large luteal cells in regressive tissue regions showed weaker delta 5-3 beta-hydroxysteroid dehydrogenase activities than in maturing or well-developed tissue regions. Succinate dehydrogenase activities of small luteal cells were highest in regressive luteal tissue. The results indicate that structural development of bovine luteal tissue during pregnancy is reflected by corresponding enzyme activities.
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