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Related Experiment Videos

[Segmental intestinal perfusion. A "new" technique for human studies]

L Knutson1, R Hällgren, O Ahrenstedt

  • 1Kirurgiska kliniken, Akademiska sjukhuset, Uppsala.

Lakartidningen
|May 11, 1994
PubMed
Summary

Inflammatory mediators and macromolecule leakage increase in Crohn's disease, celiac disease, and food intolerance. Segmental intestinal perfusion revealed these changes, alongside insights into drug absorption and ion transport.

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Area of Science:

  • Gastroenterology and Immunology
  • Intestinal Physiology
  • Drug Absorption Kinetics

Background:

  • Inflammatory mediators and macromolecule permeation are key in intestinal diseases.
  • Understanding these processes is crucial for diagnosing and managing conditions like Crohn's disease, celiac disease, and food intolerance.
  • Segmental intestinal perfusion offers a method to study localized intestinal functions.

Purpose of the Study:

  • To investigate the release of inflammatory mediators and macromolecule permeation in patients with Crohn's disease, celiac disease, and food intolerance.
  • To assess drug absorption, ion, and bicarbonate transport in healthy subjects.
  • To correlate findings with specific disease states and intestinal segments.

Main Methods:

  • Utilized a segmental intestinal perfusion system to study localized intestinal functions.

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  • Administered luminal provocations with specific antigens in patients with celiac disease and food intolerance.
  • Measured inflammatory mediator release, macromolecule leakage (plasma and lymph), drug absorption kinetics, and ion/bicarbonate transport.

    • Main Results:

    • Patients with distal ileum Crohn's disease showed increased inflammatory agent release into the proximal jejunum.
    • Luminal antigen challenge in celiac disease and food intolerance triggered mucosal cell activation and increased plasma-lymph leakage.
    • Drug absorption kinetics and basal neurological effects on ion and bicarbonate transport were elucidated in healthy individuals.

    Conclusions:

    • Segmental intestinal perfusion is effective in demonstrating localized inflammatory responses and altered barrier function in gastrointestinal diseases.
    • Findings highlight the complex interplay between antigens, mucosal immunity, and intestinal permeability in celiac disease and food intolerance.
    • The study provides a foundation for understanding drug transport and ion regulation in the human intestine.