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  • Title: Augmentation of progesterone receptor concentration by progesterone and estrogen treatments in the chick oviduct.
    Author: Ylikomi T, Isola J, Ratia J, Vähä-Tahlo T, Tuohimaa P.
    Journal: J Steroid Biochem; 1984 Jan; 20(1):445-7. PubMed ID: 6708528.
    Abstract:
    Cytosol receptors for progesterone in the chick oviduct were measured by charcoal-adsorption assay by using ORG 2058 as a ligand after long-term administration of progesterone and diethylstilbestrol (DES). Steroid administration was carried out by using daily injections or silastic capsules. DES treatment increased the progesterone receptor concentration (from 11500 to 21500 sites per cell, day 14). Progesterone also augmented the concentration of its own receptors (from 11500 to 29000 sites per cell, day 14). In the experiments with capsule administration the same trend was seen. This indicates that both diethylstilbestrol and progesterone are able to increase the concentration of progesterone specific cytosol receptors in the non-differentiated chick oviduct.
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