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Related Experiment Videos

Kinins induce rapid structural changes in colon concomitant with chloride secretion.

D A Baron, D H Miller, H S Margolius

    Cell and Tissue Research
    |January 1, 1986
    PubMed
    Summary

    Bradykinin triggers rapid changes in colon epithelial structure, decreasing the distance between the surface and muscularis mucosa. This architectural reconfiguration occurs alongside increased chloride secretion, indicating contractile events.

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    Area of Science:

    • Gastroenterology
    • Cell Biology
    • Physiology

    Background:

    • Bradykinin is known to increase short-circuit current in colonic epithelia, representing net chloride secretion.
    • The precise structural and architectural changes accompanying this physiological response are not fully understood.

    Purpose of the Study:

    • To investigate the rapid morphological and architectural alterations in colonic epithelia following bradykinin stimulation.
    • To determine if epithelial contractile events are associated with bradykinin-induced chloride secretion.

    Main Methods:

    • Voltage-clamped colonic epithelia were utilized for morphological observation.
    • Samples were fixed minutes after the addition of bradykinin.
    • Paired controls were used for comparative analysis.

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    Main Results:

    • A significant decrease in the distance from the luminal epithelial surface to the muscularis mucosa was observed over time.
    • Marked structural alterations occurred in the crypts of Lieberkühn and surrounding lamina propria.
    • These changes were observed in conjunction with bradykinin's known effect on short-circuit current.

    Conclusions:

    • Bradykinin stimulation induces rapid architectural reconfiguration of the colonic epithelium.
    • Kinin-receptor interaction likely leads to epithelial contractile events.
    • These contractile events occur simultaneously with net chloride secretion, suggesting a coordinated response.