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Related Experiment Videos

Hormonal effects on the pylorus.

K Phaosawasdi, R S Fisher

    The American Journal of Physiology
    |November 1, 1982
    PubMed
    Summary

    This study investigated how glucagon, secretin, and cholecystokinin affect pyloric pressure. While these hormones significantly increased pyloric pressure, their physiological relevance remains uncertain.

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    Area of Science:

    • Gastroenterology
    • Endocrinology
    • Physiology

    Background:

    • Pyloric pressure regulation is not fully understood.
    • Hormonal influences on pyloric function require further elucidation.

    Purpose of the Study:

    • To determine dose-related pyloric pressure responses to exogenous glucagon, secretin, and cholecystokinin.
    • To correlate changes in pyloric pressure with serum hormone concentrations.

    Main Methods:

    • Pyloric pressures measured using infusion manometry.
    • Serum glucagon and secretin concentrations quantified via radioimmunoassays.
    • Hormone administration included glucagon, secretin, and cholecystokinin.

    Main Results:

    • Glucagon, secretin, and cholecystokinin significantly increased pyloric pressure.
    • Lowest active dosages were 2 µg/kg/h (glucagon), 2 U/kg/h (secretin), and 1 U/kg/h (cholecystokinin).
    • Pyloric pressure responses observed during insulin hypoglycemia, duodenal acidification, and intraduodenal olive oil were also recorded.

    Conclusions:

    • Exogenous glucagon, secretin, and cholecystokinin induce pyloric contraction.
    • The physiological relevance of these induced pyloric contractions requires further investigation.

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