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Related Concept Videos

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Related Experiment Video

Updated: May 1, 2026

Mixed Primary Cultures of Murine Small Intestine Intended for the Study of Gut Hormone Secretion and Live Cell Imaging of Enteroendocrine Cells
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Enteroglucagon cell hyperfunction in rat small intestine after gut resection.

A M Buchan, C J Griffiths, J F Morris

    Gastroenterology
    |January 1, 1985
    PubMed
    Summary

    Experimental rat models showed enteroglucagon cells in a hyperfunctional state after massive small bowel resection and bombesin infusion. These changes indicate increased cellular activity and hormone production in response to the interventions.

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    Area of Science:

    • Gastroenterology
    • Cell Biology
    • Endocrinology

    Background:

    • Enteroglucagon cells play a role in intestinal regulation.
    • Massive small bowel resection and bombesin infusion are known to affect gastrointestinal function.

    Purpose of the Study:

    • To investigate the ultrastructural changes in immunoreactive enteroglucagon cells in response to massive small bowel resection and bombesin infusion in rat models.
    • To determine if these interventions induce a hypersecretory state in enteroglucagon cells.

    Main Methods:

    • Three experimental rat models were used: massive small bowel resection alone, massive small bowel resection with bombesin infusion, and transection with bombesin infusion.
    • Ultrastructural characteristics of enteroglucagon cells were analyzed, focusing on cell size, cytoplasmic area, secretory granule volume density, rough endoplasmic reticulum area, and secretory granule diameter.

    Main Results:

    • No significant changes in cell size or cytoplasmic area were observed.
    • A significant decrease in secretory granule volume density (200-400%) and a significant increase in rough endoplasmic reticulum area (150-200%) were found in all groups.
    • Bombesin treatment led to a significant decrease in secretory granule diameter (7-10%), while resection alone did not affect granule size.

    Conclusions:

    • Enteroglucagon cells in the studied rat models exhibit a hyperfunctional state.
    • The observed ultrastructural changes suggest enhanced cellular activity and potentially increased hormone synthesis and secretion.
    • Bombesin plays a role in modulating secretory granule characteristics in enteroglucagon cells.