PMID- 16162681 OWN - NLM STAT- MEDLINE DCOM- 20060516 LR - 20240413 IS - 0017-5749 (Print) IS - 1468-3288 (Electronic) IS - 0017-5749 (Linking) VI - 55 IP - 5 DP - 2006 May TI - Transforming growth factor beta induced FoxP3+ regulatory T cells suppress Th1 mediated experimental colitis. PG - 671-80 AB - BACKGROUND AND AIMS: The imbalance between effector and regulatory T cells plays a central role in the pathogenesis of inflammatory bowel diseases. In addition to the thymus, CD4+CD25+ regulatory T cells can be induced in the periphery from a population of CD25- T cells by treatment with transforming growth factor beta (TGF-beta). Here, we analysed the in vivo function of TGF-beta induced regulatory T (Ti-Treg) cells in experimental colitis. METHODS: Ti-Treg cells were generated in cell culture in the presence or absence of TGF-beta and tested for their regulatory potential in experimental colitis using the CD4+CD62L+ T cell transfer model. RESULTS: Ti-Treg cells significantly suppressed Th1 mediated colitis on CD4+CD62L+ T cell transfer in vivo, as shown by high resolution endoscopy, histology, immunohistochemistry, and cytokine analysis. Further analysis of in vivo and in vitro expanded Ti-Treg cells showed that exogenous interleukin 2 (IL-2) was crucial for survival and expansion of these cells. CONCLUSION: Our data suggest that regulatory Ti-Treg cells expand by TGF-beta and exogenous IL-2 derived from effector T cells at the site of inflammation. In addition to Tr1 and thymic CD4+CD25+ T cells, peripheral Ti-Treg cells emerge as a class of regulatory T cells with therapeutic potential in T cell mediated chronic intestinal inflammation. FAU - Fantini, M C AU - Fantini MC AD - Laboratory of Immunology, I Medical Clinic, Johannes Gutenberg University of Mainz, Mainz, Germany. FAU - Becker, C AU - Becker C FAU - Tubbe, I AU - Tubbe I FAU - Nikolaev, A AU - Nikolaev A FAU - Lehr, H A AU - Lehr HA FAU - Galle, P AU - Galle P FAU - Neurath, M F AU - Neurath MF LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20050914 PL - England TA - Gut JT - Gut JID - 2985108R RN - 0 (Cytokines) RN - 0 (Forkhead Transcription Factors) RN - 0 (Foxp3 protein, mouse) RN - 0 (Transforming Growth Factor beta) RN - 126880-86-2 (L-Selectin) SB - IM CIN - Gut. 2006 May;55(5):604-6. PMID: 16609133 MH - Adoptive Transfer/*methods MH - Animals MH - CD4-Positive T-Lymphocytes/*immunology MH - Cell Proliferation MH - Colitis/immunology/*therapy MH - Cytokines/immunology MH - Forkhead Transcription Factors/*immunology MH - Immunohistochemistry MH - L-Selectin/immunology MH - Lymphocyte Activation MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, SCID MH - Reverse Transcriptase Polymerase Chain Reaction MH - T-Lymphocytes, Regulatory/immunology MH - Th1 Cells/immunology MH - Transforming Growth Factor beta/*immunology PMC - PMC1856126 COIS- Conflict of interest: None declared. EDAT- 2005/09/16 09:00 MHDA- 2006/05/17 09:00 PMCR- 2009/05/01 CRDT- 2005/09/16 09:00 PHST- 2005/09/16 09:00 [pubmed] PHST- 2006/05/17 09:00 [medline] PHST- 2005/09/16 09:00 [entrez] PHST- 2009/05/01 00:00 [pmc-release] AID - gut.2005.072801 [pii] AID - gt72801 [pii] AID - 10.1136/gut.2005.072801 [doi] PST - ppublish SO - Gut. 2006 May;55(5):671-80. doi: 10.1136/gut.2005.072801. Epub 2005 Sep 14.