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Insulin-dependent diabetes and gut dysfunction: the BB rat model.

W J Malaisse1, P Courtois, F W Scott

  • 1Laboratory of Experimental Hormonology, Brussels Free University, Brussels, Belgium. malaisse@ulb.ac.be.

Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
|October 16, 2004
PubMed
Summary

Diet significantly impacts type 1 diabetes development in BB rats by affecting gut health. Specific dietary components and gut immune system changes are linked to diabetes incidence in this animal model.

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Area of Science:

  • Gastroenterology
  • Immunology
  • Endocrinology

Background:

  • Intestinal dysfunction and gut immune dysregulation are implicated in type 1 diabetes pathogenesis.
  • The BB rat is a valuable animal model for studying spontaneous immune-mediated type 1 diabetes.

Purpose of the Study:

  • To review gut damage and dysfunction in BB rats concerning type 1 diabetes.
  • To emphasize the role of diet in diabetes incidence and identify diabetes-related wheat proteins.
  • To document immune system anomalies in gut-associated lymphoid tissues and pancreatic lymph nodes.

Main Methods:

  • Histological examination of gut damage.
  • Assessment of intestinal disaccharidase and peroxidase activity.
  • Analysis of glucagon-like peptide 1 levels, intestinal permeability, and mucin content.

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  • Comparison of findings between diabetes-promoting and diabetes-retardant diets.
  • Main Results:

    • BB rats exhibit histological gut damage and altered intestinal enzyme activities.
    • Changes in gut permeability, mucin content, and GLP-1 levels are observed.
    • Diet composition influences diabetes incidence, with specific wheat proteins identified as potentially diabetogenic.
    • Immune cell anomalies are present in Peyer's patches, mesenteric lymph nodes, and pancreatic lymph nodes.

    Conclusions:

    • Diet plays a critical role in modulating type 1 diabetes development in BB rats.
    • Gut barrier function and immune homeostasis are significantly disrupted in diabetes-prone BB rats.
    • Further research into dietary interventions and gut-immune interactions is warranted for type 1 diabetes prevention and treatment.