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Related Experiment Videos

A radioimmunoassay for human prolactin.

P Hwang, H Guyda, H Friesen

    Proceedings of the National Academy of Sciences of the United States of America
    |August 1, 1971
    PubMed
    Summary

    A new radioimmunoassay accurately measures primate prolactin levels. This assay is crucial for diagnosing conditions like galactorrhea and monitoring pregnancy, showing distinct prolactin concentrations in various physiological states.

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    Area of Science:

    • Endocrinology
    • Biochemistry
    • Immunology

    Background:

    • Prolactin is a key hormone regulating numerous physiological processes.
    • Accurate measurement of prolactin is essential for diagnosing endocrine disorders.

    Purpose of the Study:

    • To develop and validate a specific and sensitive radioimmunoassay for primate prolactin.
    • To establish normal prolactin concentration ranges in various human populations and physiological states.

    Main Methods:

    • Development of a radioimmunoassay using [(131)I] monkey prolactin and specific antibodies.
    • Validation of assay specificity against human growth hormone and placental lactogens.
    • Measurement of serum prolactin concentrations in normal individuals, pregnant women, postpartum women, and patients with specific conditions.

    Main Results:

    • The assay demonstrated high specificity and sensitivity for prolactin.
    • Normal adult serum prolactin levels were typically below 30 ng/ml, with significantly higher levels in newborns (up to 500 ng/ml).
    • Elevated prolactin levels were observed in patients with galactorrhea (up to 1500 ng/ml) and during pregnancy, peaking at 200 ng/ml at term.
    • Suckling was identified as a potent stimulus for prolactin release.

    Conclusions:

    • The developed radioimmunoassay is a reliable tool for measuring primate prolactin.
    • Prolactin levels vary significantly across different physiological states, including pregnancy, postpartum, and lactation.
    • The assay aids in the diagnosis and management of prolactin-related disorders.

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