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Acute prolactin release triggered by feeding

M E Quigley, J F Ropert, S S Yen

    The Journal of Clinical Endocrinology and Metabolism
    |May 1, 1981
    PubMed
    Summary
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    Eating meals, like lunch or supper, triggers a rapid increase in serum prolactin (PRL) levels. This demonstrates that food intake stimulates acute prolactin release from the hypothalamic-pituitary axis.

    Area of Science:

    • Endocrinology
    • Neuroendocrinology
    • Physiology

    Background:

    • Prolactin (PRL) is a hormone with diverse functions.
    • The regulation of PRL secretion is complex and influenced by various stimuli.
    • The relationship between feeding and acute PRL release requires further elucidation.

    Purpose of the Study:

    • To investigate the acute effect of meal initiation on serum prolactin levels.
    • To determine if feeding serves as a trigger for prolactin release.
    • To examine the timing of PRL response following meals.

    Main Methods:

    • Serum PRL levels were measured in human subjects.
    • Blood samples were collected at timed intervals following the initiation of meals (lunch and supper).
    • Specific meal times (1200 h, 1400 h, 1700 h) were utilized for observation.

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    Main Results:

    • An abrupt increase in serum prolactin (PRL) levels was observed within 45 minutes of meal initiation.
    • This PRL increment occurred consistently after both lunch and supper.
    • The findings indicate a direct and rapid response to feeding.

    Conclusions:

    • Feeding acutely stimulates the release of prolactin (PRL).
    • The hypothalamic-pituitary unit is responsible for this feeding-induced PRL release.
    • These results highlight a significant physiological link between nutrient intake and hormonal regulation.