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Iron as environmental factor in the pathogenesis of Crohn's disease-like ileitis

Tanja Werner

ISBN 978-3-8325-2769-3
121 pages, year of publication: 2011
price: 42.50 €
Inflammatory bowel diseases (IBD) including ulcerative colitis and Crohn's disease (CD) are chronic disorders of the gastrointestinal tract. Iron replacement therapy is a common treatment in anemic CD patients, but oral iron supplements seem to be less tolerated. Pathogenesis of CD has been attributed to intestinal bacteria and environmental factors that trigger disease in a genetically predisposed host. The aim of this study was to characterize the interrelationship between iron sulphate, the gut microbiota, and the development of chronic ileitis in a murine model of CD.

Experimental results indicate that luminal iron sulphate deprivation in combination with systemic iron repletion inhibited the development of inflammation in TNFls Δ ARE/WT mice. The mechanisms implied changes in the gut microbiota as well as inhibition of endoplasmic reticulum stress and apoptosis in the intestinal epithelium.

In conclusion, luminal iron may directly affect intestinal epithelial function or generate a pathological milieu in the intestine that triggers epithelial cell stress-associated apoptosis through changes in the microbial homeostasis. These results suggest that oral replacement therapy with iron sulphate may trigger inflammatory processes associated with progression of CD-like ileitis.

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Keywords:
  • Iron
  • Inflammatory bowel disease
  • Crohn's disease
  • endoplasmic reticulum stress
  • apoptosis

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