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  • Title: Progesterone binding by human endometrial tissue during the proliferative and secretory phases of the menstrual cycle and by hyperplastic and carcinomatous endometrium.
    Author: Rodriquez J, Sen KK, Seski JC, Menon M, Johnson TR, Menon KM.
    Journal: Am J Obstet Gynecol; 1979 Mar 15; 133(6):660-5. PubMed ID: 426021.
    Abstract:
    Cytosol receptors for progesterone were assayed in human endometrial tissue during the proliferative and secretory phases of the menstrual cycle and in the hyperplastic and carcinomatous endometrium. The assays were performed utilizing a technique involving prior treatment of the cytosol extract with dextran-coated charcoal to remove endogenous progesterone. The results showed that the progesterone receptor activity was higher during the later proliferative and early secretory phases of the menstrual cycle. Hyperplastic and carcinomatous endometrium also contained specific cytosol receptor for progesterone, and the binding activity of the hyperplastic endometria and endometrial polyps was comparable to that found during the later proliferative phase of the menstrual cycle. No apparent correlation between the progesterone receptor level and the morphologic degree of differentiation in Grades 1 and 2 adenocarcinomas of the endometrium was observed.
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