Estrogen and Progesterone Receptors in the Uterus of the Vervet Monkey
| Autor: | T. Klein, J. H. Spies, H.C. Potgieter, M. Thierry, J. J. van der Watt |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
medicine.medical_specialty
medicine.drug_class Uterus Cercopithecus Binding Competitive Promegestone Cytosol Internal medicine Chlorocebus aethiops medicine Animals Vervet monkey Receptor Progesterone Pharmacology Cercopithecus aethiops pygerythrus Estradiol biology Osmolar Concentration Estrogen analogues biology.organism_classification Ligand (biochemistry) Kinetics medicine.anatomical_structure Endocrinology Receptors Estrogen Estrogen In utero Thermodynamics Female Receptors Progesterone |
| Zdroj: | Journal of Receptor Research. 5:193-218 |
| ISSN: | 0197-5110 |
| DOI: | 10.3109/10799898509041879 |
| Popis: | Experimental conditions for the optimal measurement of estrogen (ER) and progesterone (PR) receptors in normal vervet monkey (Cercopithecus aethiops pygerythrus) uteri are described. The uteri of this primate were found to contain relatively high concentrations of both ER and PR. Levels of ER ranged from 151 to 822 femtomoles per mg protein (mean for group assayed is 327 +/- 165 femtomoles per mg protein). PR assays were performed on the same cytosols and the levels ranged from 444 to 2267 femtomoles per mg protein (mean of 1285 +/- 511 femtomoles per mg protein). Mean Kd values for the ER- and PR-ligand complexes were found to be 3.15 +/- 1.4 X 10(-10)M and 2.38 +/- 0.2 X 10(-9)M respectively, within the group analysed (n = 21). The ratio of PR to ER varied between 1.1 and 13.1 with a mean of 4.5 +/- 2.4. Ligand specificity studies revealed that [3H]-17 beta-estradiol binding to the ER could only be inhibited by estrogens or estrogen analogues. The PR however exhibited an affinity for a wider range of ligand types. In low ionic strength buffers both ER and PR sedimented as approximately 8S type molecules in the presence or absence of 10mM sodium molybdate. Both receptors dissociated into smaller components, following a short exposure to 0.4 M KCl and subsequent centrifugation in a gradient containing 0.4 M KCl. |
| Databáze: | OpenAIRE |
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