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  • Title: Presence of estrogen receptors in the hen hypothalamus and pituitary.
    Author: Kawashima M, Kamiyoshi M, Tanaka K.
    Journal: Endocrinology; 1987 Feb; 120(2):582-8. PubMed ID: 3803291.
    Abstract:
    In the hen, the preoptic area, medial basal hypothalamus, and anterior lobe of the pituitary showed a greater uptake of [3H]estradiol-17 beta (E2) in vivo than other tissues. This uptake was decreased when unlabeled diethylstilbestrol was injected together with the [3H]E2 or when unlabeled E2 was injected before the [3H]E2 injection. A specific estrogen binding component having properties of a receptor was found in vitro in both soluble and insoluble fractions of these tissues in a hypotonic buffer solution. The administration of E2 in vivo caused a marked decrease in the estrogen receptor binding in the soluble fraction with a concomitant increase in binding in the insoluble fraction; as a result, total binding (sum of the bindings in soluble and insoluble fraction) did not change.
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