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Related Experiment Videos

[Androgen binding proteins in human prostate (author's transl)].

I Jung-Testas, C H Mercier-Bodard, P Robel

    Annales D'Endocrinologie
    |March 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

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    Researchers identified two binding components in human prostate cytosol: androgen receptors and sex steroid-binding protein (SBP). SBP-testosterone complexes may associate with prostate cells, influencing testosterone uptake and metabolism.

    Area of Science:

    • Biochemistry
    • Endocrinology
    • Molecular Biology

    Context:

    • Hyperplastic human prostate cytosol contains specific steroid-binding proteins.
    • Understanding these proteins is crucial for prostate biology and disease research.

    Purpose:

    • To identify and characterize high-affinity steroid-binding components in human prostate cytosol.
    • To investigate the role of sex steroid-binding protein (SBP) in testosterone uptake and metabolism in prostate tissue.

    Summary:

    • Glycerol gradient centrifugation revealed two binding components in prostate cytosol: androgen receptors (8-10 S) and sex steroid-binding protein (SBP) (4-5 S).
    • Calculated cytosol receptor concentration was 50 fmol/mg protein (5,000 sites/cell), while SBP concentration was 8,000 sites/cell.
    • Organ culture experiments with 3H-testosterone suggested that the SBP-testosterone complex might associate with prostate cells, impacting testosterone metabolism.

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    Impact:

    • Provides insights into the molecular mechanisms of androgen and steroid binding in the prostate.
    • Suggests a potential role for SBP in modulating prostate cell response to testosterone.
    • Contributes to the understanding of steroid hormone action in prostate physiology and pathology.