Pattern of 11 beta-hydroxysteroid dehydrogenase type 1 messenger ribonucleic acid expression in the ovine uterus during the estrous cycle and pregnancy

Biology of Reproduction
K YangA Darnel

Abstract

The present study was designed to examine the pattern and cellular localization of 11 beta-hydroxysteroid dehydrogenase type 1 (11 beta-HSD1) gene expression in the ovine uterus during pregnancy and at 3 mo postpartum. High levels of 11 beta-HSD1 mRNA were detected in the endometrium from Days 60 to 143 (term = 145 days), and the levels did not change significantly during that time. The level of 11 beta-HSD1 mRNA in the endometrium was always much higher than that in the myometrium, in which the mRNA was not readily detectable throughout pregnancy; at 3 mo postpartum, 11 beta-HSD1 mRNA became undetectable in both endometrium and myometrium. Within the endometrium, intense immunoreactive 11 beta-HSD1 was localized exclusively to the luminal epithelium, and the intensity of 11 beta-HSD1 immunostaining closely followed the level of 11 beta-HSD1 mRNA. To determine whether the level of endometrial 11 beta-HSD1 mRNA was related to the status of ovarian function, tissues from non-pregnant animals at different stages of their reproductive cycle were also examined. It was found that 11 beta-HSD1 mRNA was undetectable in the endometrium of cycling animals up to Day 9 of the estrous cycle but was detectable thereafter. Taken together, the...Continue Reading

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