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. 1970 Oct;119(4):773–784. doi: 10.1042/bj1190773

Effects of oestradiol-17β and progesterone on total and nuclear-protein synthesis in epithelial and stromal tissues of the mouse uterus, and of progesterone on the ability of these tissues to bind oestradiol-17β

J A Smith 1, L Martin 1, R J B King 1, M Vértes 1,*
PMCID: PMC1179465  PMID: 5493510

Abstract

1. A method is described for separating uterine epithelium that is 80% pure and connective-tissue stroma that is 60% pure. This was used to study the effects of steroid hormones on total and nuclear-protein synthesis in these tissues. 2. Oestradiol-17β given alone produces mitoses in the epithelium but not in the stroma. It stimulated incorporation in vitro of [14C]lysine into total protein, histones and acidic nuclear proteins to a greater extent in epithelium than stroma. Incorporation into acidic nuclear proteins was most markedly stimulated, reaching four to six times the normal value 4h after treatment, and then declining rapidly. This peak was only seen in epithelial preparations. 3. After pretreatment with progesterone, oestradiol-17β has the reverse effect, producing mitoses only in stroma. Progesterone alone had no effect on the amounts or rates of incorporation of [14C]lysine into stromal nuclear proteins, but changes after oestradiol-17β treatment were similar to those seen in epithelium with oestradiol-17β alone. In the epithelium, progesterone alone depressed incorporation into histones and acidic nuclear proteins, but did not abolish the subsequent response to oestradiol-17β. With this treatment there was a rapid, large and transient increase in incorporation into epithelial total protein not seen with oestradiol-17β alone. 4. Progesterone had no qualitative effect on the distribution of specific oestrogen-binding proteins, as judged by sucrose-density-gradient centrifugation. However, progesterone treatment increased the uptake in vivo of [6,7-3H]oestradiol-17β by stroma, and it is possible that this is important although the differences were not apparent after labelling in vitro.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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