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Suppression of chronic intestinal inflammation by different subtypes of T cells has been described in recent years. In particular, naturally arising CD4(+)CD25(+) regulatory T cells and IL-10-producing regulatory T cell type 1 CD4(+) T lymphocytes have been implicated in the regulation of intestinal inflammation. Here we focus on the ability of CD4(+)CD25(+) regulatory T cells to suppress innate and T-cell responses and discuss implications for immunoregulation in human inflammatory bowel disease. Besides the modulation of lymphoproliferation, a role for CD4(+)CD25(+) T cells in down-modulation of innate immune responses is emerging and the immunoregulatory activities of regulatory T cells in vivo may be mediated via effects on dendritic cells. Considering the extraordinary regenerative potential of the intestinal mucosa, the ability to impede pathogenic T-cell responses by active regulation might be of particular therapeutic benefit for the treatment of chronic intestinal inflammatory diseases such as Crohn's disease and ulcerative colitis.

Original publication




Journal article


Springer Semin Immunopathol

Publication Date





167 - 180


Animals, Colitis, Cytokines, Humans, Inflammatory Bowel Diseases, Intestinal Mucosa, Intestines, T-Lymphocyte Subsets, T-Lymphocytes, Regulatory