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Review
. 2008 Nov;1 Suppl 1(0 1):S31-3.
doi: 10.1038/mi.2008.40.

The role of IL-13 and NK T cells in experimental and human ulcerative colitis

Affiliations
Review

The role of IL-13 and NK T cells in experimental and human ulcerative colitis

I J Fuss et al. Mucosal Immunol. 2008 Nov.

Abstract

Recent studies that have evaluated the immunologic factors that mediate the development of the two forms of inflammatory bowel disease, namely Crohn's disease and ulcerative colitis (UC), have suggested that these diseases are because of disparate immune responses. Although Crohn's disease has been characterized as a dysregulation of the T helper (Th)1/Th17 pathways more recent evidence has emerged that UC pathogenesis is associated with a nonclassical NK (natural killer) T cell producing an atypical Th2 (interleukin (IL)-13) response. In the following review the insights gained from both animal models and human studies as to the function that IL-13 and NK T cells have in the pathogenesis of UC will be discussed.

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Figures

Figure 1
Figure 1
Proposed Mechanism for experimental and human ulcerative colitis. Innate antigen is presented to and taken up by LP antigen presenting cells bearing CD1, which in turn presents to NK T cells. These NK T cells are then activated to secrete IL-13. IL-13 may bring about changes in epithelial barrier function leading to further antigen exposure. In addition, NK T cells upon activation may be directly cytotoxic to epithelial cells.

References

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