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Related Experiment Videos

The secretion of pepsin.

T Kondo, D F Magee

    The Journal of Physiology
    |August 1, 1977
    PubMed
    Summary

    Stomach vessel ligation significantly boosts pepsin secretion, an effect lasting at least six months. This procedure appears to remove an inhibitory mechanism, enhancing gastric pepsinogen production without affecting acid secretion.

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    Area of Science:

    • Gastroenterology
    • Physiology

    Background:

    • Gastric pepsin secretion is a critical component of digestion.
    • The regulation of pepsin secretion involves complex neural and hormonal pathways.
    • Previous research has not fully elucidated the role of specific gastric vasculature in pepsin regulation.

    Purpose of the Study:

    • To investigate the impact of selective ligation and division of gastric feeding vessels on pepsin secretion.
    • To determine if this vascular manipulation affects gastric acid secretion.
    • To explore potential mechanisms underlying changes in pepsin secretion.

    Main Methods:

    • Surgical ligation and division of specific stomach arteries, excluding splenic vessels.
    • Administration of pentagastrin, pilocarpine, and 2-deoxy-D-glucose to stimulate gastric secretion.
    • Analysis of gastric acid and pepsin output using dose-response curves.
    • Assessment of secretory function at baseline and up to 6 months post-procedure.

    Main Results:

    • Selective gastric vessel ligation resulted in a significant increase in pepsin secretion in response to all tested stimuli.
    • This enhanced pepsin secretion persisted for at least 6 months after the surgical procedure.
    • Analysis of dose-response curves indicated an elevated Vmax for pepsin secretion post-ligation.
    • Gastric acid secretion remained unaffected by the vascular ligation procedure.

    Conclusions:

    • Ligation and division of specific gastric feeding vessels enhance pentagastrin-, pilocarpine-, and 2-deoxy-D-glucose-stimulated pepsin secretion.
    • The observed increase in pepsin secretion is a sustained effect, present 6 months post-procedure.
    • The data suggest that this surgical manipulation removes a non-competitive inhibitory mechanism regulating gastric pepsin secretion.

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