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Related Experiment Videos

Does luminal gastrin stimulate gastric acid secretion?

A Ayalon, R Yazigi, P Devitt

    American Journal of Surgery
    |January 1, 1981
    PubMed
    Summary

    Luminal pentagastrin, a hormone, does not stimulate gastric acid secretion in bullfrog stomachs. Even at high concentrations, it had no effect when applied to the lumen, suggesting no physiological role.

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    Area of Science:

    • Gastroenterology
    • Physiology
    • Endocrinology

    Background:

    • Gastrin is a key hormone regulating gastric acid secretion.
    • The precise role of luminal gastrin in gastric physiology requires further elucidation.

    Purpose of the Study:

    • To investigate the effects of pentagastrin on isolated bullfrog fundic mucosa.
    • To determine if luminal administration of pentagastrin influences gastric acid secretion and electrical parameters.

    Main Methods:

    • Isolated bullfrog fundic mucosa was used for in vitro experiments.
    • Measurements included acid secretion, short-circuit current, electrical conductance, and potential difference.
    • Pentagastrin was applied to the luminal and serosal sides of the mucosa.

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    Main Results:

    • Biologically active luminal pentagastrin demonstrated no significant effect on gastric mucosa.
    • Serosal application of pentagastrin stimulated the mucosa as expected.
    • High concentrations (100x) of luminal pentagastrin did not alter gastric function.

    Conclusions:

    • Luminal gastrin does not appear to play a physiological role in regulating gastric secretory processes.
    • Gastrin's primary action on gastric secretion is likely mediated through the serosal side.
    • These findings contribute to understanding the localized action of peptide hormones in the gastric system.