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Plasma retinol-binding protein

D S Goodman

    Annals of the New York Academy of Sciences
    |January 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Vitamin A transport relies on retinol-binding protein (RBP), produced in the liver. RBP levels indicate liver and kidney health, with deficiency blocking RBP secretion.

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    Area of Science:

    • Biochemistry
    • Human Physiology
    • Molecular Biology

    Background:

    • Vitamin A is transported in plasma as retinol, bound to retinol-binding protein (RBP).
    • RBP forms a complex with prealbumin and has known structural and metabolic properties.
    • RBP is synthesized in the liver and primarily catabolized by the kidneys.

    Purpose of the Study:

    • To investigate the regulation of vitamin A mobilization and transport.
    • To understand the cellular and molecular mechanisms controlling RBP secretion.
    • To define the basic mechanisms of vitamin A transport and delivery.

    Main Methods:

    • Analysis of RBP and prealbumin structure and interactions.
    • Clinical studies examining plasma RBP and prealbumin levels in various diseases.

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  • Investigation of RBP secretion regulation in response to retinol levels.

    • Main Results:

    • Plasma RBP levels are decreased in liver disease and increased in renal disease.
    • Retinol deficiency inhibits RBP secretion, leading to lower plasma and higher liver RBP levels.
    • Retinol administration stimulates RBP secretion in deficient animal models.

    Conclusions:

    • RBP plays a crucial role in vitamin A transport and its levels reflect liver and kidney function.
    • Vitamin A mobilization is tightly regulated by RBP production and secretion.
    • Further research into RBP's cellular mechanisms will clarify vitamin A transport regulation.