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Related Experiment Videos

Glucocorticoid binding in the hen oviduct

V K Moudgil, S P Healy, T L Shaffer

    The Biochemical Journal
    |July 15, 1981
    PubMed
    Summary

    Researchers identified a high-affinity binding molecule in avian oviduct cytosol, confirming it as a glucocorticoid receptor. This molecule binds triamcinolone acetonide and other steroids, with its properties influenced by temperature and specific compounds.

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    Area of Science:

    • Endocrinology
    • Molecular Biology
    • Avian Physiology

    Background:

    • Steroid hormone receptors play crucial roles in regulating gene expression.
    • The avian oviduct is a key reproductive organ where steroid hormones exert significant influence.

    Purpose of the Study:

    • To characterize the binding properties of steroid receptors in the avian oviduct.
    • To identify the specific type of steroid receptor present in hen oviduct cytosol.

    Main Methods:

    • Incubation of [(3H]triamcinolone acetonide with hen oviduct cytosol.
    • Charcoal assays to determine steroid binding extent.
    • Scatchard analysis and sucrose gradient centrifugation for receptor characterization.

    Main Results:

    • A high-affinity binding molecule for triamcinolone acetonide was identified in hen oviduct cytosol.
    • The receptor exhibited affinity for various steroids, including cortisol and dihydrotestosterone.
    • The binding molecule demonstrated characteristics consistent with a glucocorticoid receptor, sedimenting as 7-8S and 4S entities.

    Conclusions:

    • The avian oviduct possesses a high-affinity binding molecule fulfilling the criteria of a glucocorticoid receptor.
    • This receptor plays a role in mediating the effects of glucocorticoids in the avian reproductive system.

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