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CD4+CD25+ regulatory T cells can prevent and resolve intestinal inflammation in the murine T cell transfer model of colitis. Using Foxp3 as a marker of regulatory T cell activity, we now provide a comprehensive analysis of the in vivo distribution of Foxp3+CD4+CD25+ cells in wild-type mice, and during cure of experimental colitis. In both cases, Foxp3+CD4+CD25+ cells were found to accumulate in the colon and secondary lymphoid organs. Importantly, Foxp3+ cells were present at increased density in colon samples from patients with ulcerative colitis or Crohn's disease, suggesting similarities in the behavior of murine and human regulatory cells under inflammatory conditions. Cure of murine colitis was dependent on the presence of IL-10, and IL-10-producing CD4+CD25+ T cells were enriched within the colon during cure of colitis and also under steady state conditions. Our data indicate that although CD4+CD25+ T cells expressing Foxp3 are present within both lymphoid organs and the colon, subsets of IL-10-producing CD4+CD25+ T cells are present mainly within the intestinal lamina propria suggesting compartmentalization of the regulatory T cell response at effector sites.

Original publication

DOI

10.4049/jimmunol.177.9.5852

Type

Journal article

Journal

Journal of immunology (Baltimore, Md. : 1950)

Publication Date

11/2006

Volume

177

Pages

5852 - 5860

Addresses

Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, United Kingdom.

Keywords

Colon, Lymphoid Tissue, T-Lymphocyte Subsets, Animals, Mice, Knockout, Humans, Mice, Colitis, Disease Models, Animal, Antigens, CD4, Interleukin-10, T-Lymphocytes, Regulatory, Forkhead Transcription Factors, Interleukin-2 Receptor alpha Subunit