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Experimental colitis in animal models.

H S Kim1, A Berstad

  • 1Dept. of Internal Medicine, National Medical Centre, Seoul, South Korea.

Scandinavian Journal of Gastroenterology
|July 1, 1992
PubMed
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Animal models of colitis show increased eicosanoids, similar to human disease. However, these models do not fully replicate human ulcerative colitis, suggesting a common inflammatory pathway.

Area of Science:

  • Gastroenterology
  • Immunology
  • Pharmacology

Background:

  • Colitis, an inflammatory bowel disease, shares some characteristics with animal models.
  • Animal models are crucial for understanding inflammatory mediators in colitis.

Purpose of the Study:

  • To review various animal models of colitis.
  • To compare animal models with human ulcerative colitis.
  • To investigate the underlying mechanisms of colitis in animal models.

Main Methods:

  • Oral administration of sulfated polysaccharides (carrageenan, amylopectin sulfate, dextran sulfate).
  • Rectal instillation of diluted acetic acid.
  • Induction of delayed hypersensitivity and Arthus reactions.
  • Administration of chemoattractant peptides like FMLP.

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Main Results:

  • All tested animal models exhibited increased eicosanoid production, mirroring human colitis.
  • Immune-mediated models produced similar colitis outcomes, indicating a non-specific response.
  • No animal model, except possibly the cotton-top tamarin, accurately reflects human ulcerative colitis etiology or histology.

Conclusions:

  • Animal models provide insights into inflammatory mediator function in colitis.
  • Colitis induction in animals may involve a common immunologic pathway, irrespective of the initial trigger.
  • Further research is needed to develop animal models that fully recapitulate human ulcerative colitis.