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Related Experiment Videos

Cytokines in Crohn's colitis

M E Sher1, A J D'Angelo, T A Stein

  • 1Department of Surgery, Long Island Jewish Medical Center, New Hyde Park, New York.

American Journal of Surgery
|January 1, 1995
PubMed
Summary

Cytokine levels, including Interleukin (IL)-1 beta and IL-8, are elevated in both diseased and healthy-appearing colon segments of Crohn's colitis patients, suggesting widespread colonic inflammation. This indicates Crohn's colitis may affect the entire colon, not just visible diseased areas.

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Area of Science:

  • Gastroenterology
  • Immunology
  • Molecular Biology

Background:

  • Crohn's colitis is characterized by increased cytokine levels in diseased colonic segments.
  • The concentration of cytokines in clinically and histologically normal colonic segments in Crohn's colitis remains unstudied.

Purpose of the Study:

  • To investigate the concentration of specific cytokines in both diseased and nondiseased colonic segments of patients with Crohn's colitis.
  • To compare these concentrations with those in healthy controls.

Main Methods:

  • Mucosal biopsies were collected from 7 Crohn's colitis patients and 7 controls.
  • Enzyme-linked immunosorbent assay (ELISA) was used to measure Interleukin (IL)-1 beta, IL-2, IL-6, and IL-8 concentrations.
  • Histologic examination confirmed diseased and nondiseased colonic segments.

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Main Results:

  • Concentrations of IL-1 beta, IL-6, and IL-8 were significantly higher in diseased segments compared to controls.
  • IL-1 beta, IL-2, and IL-8 levels were also significantly elevated in normal-appearing segments of Crohn's colitis patients versus controls.
  • IL-1 beta and IL-8 were significantly higher in both involved and uninvolved segments of Crohn's colitis patients compared to controls.

Conclusions:

  • Crohn's colitis is associated with increased concentrations of IL-1 beta and IL-8 throughout the entire colon, even in histologically normal segments.
  • These findings support the hypothesis that Crohn's colitis involves the whole colon, irrespective of clinical or histological presentation.