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Related Experiment Videos

Prolactin as a luteotrophin.

B D Murphy, K Rajkumar

    Canadian Journal of Physiology and Pharmacology
    |March 1, 1985
    PubMed
    Summary

    The pituitary hormone prolactin (PRL) directly supports the corpus luteum. It stimulates progesterone synthesis and maintains essential receptors, suggesting a genomic activation mechanism.

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    IUCrData·2022

    Area of Science:

    • Reproductive Endocrinology
    • Molecular Endocrinology
    • Luteal Physiology

    Background:

    • The corpus luteum is crucial for progesterone production during the menstrual cycle.
    • The role of pituitary hormones in luteal function is complex and not fully elucidated.
    • Prolactin (PRL) has been investigated for its potential direct effects on the corpus luteum.

    Purpose of the Study:

    • To review the evidence supporting a direct luteotrophic role for prolactin (PRL).
    • To elucidate the specific mechanisms by which PRL may influence luteal function.
    • To explore the temporal aspects and molecular pathways involved in PRL's luteotrophic actions.

    Main Methods:

    • Review of existing scientific literature on prolactin and luteal function.
    • Analysis of in vitro studies demonstrating PRL's effects on progesterone synthesis.
    • Examination of studies investigating PRL's impact on cellular structures and substrate import.

    Main Results:

    • Prolactin (PRL) directly stimulates progesterone synthesis in vitro.
    • PRL maintains luteal cell membrane fluidity and luteinizing hormone (LH) receptors.
    • PRL facilitates substrate import for progesterone synthesis, with effects observed over hours to days.

    Conclusions:

    • Prolactin (PRL) plays a direct luteotrophic role, supporting corpus luteum function.
    • PRL likely exerts its effects through genomic activation, inducing synthesis of specific luteal proteins.
    • These proteins may regulate intracellular substrates, LH receptors, or lipoprotein receptors, crucial for luteal maintenance.

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