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    block this user Werner Muller

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    Faculty of Life Science, University of Manchester, Manchester

    Regulatory T cell-derived interleukin-10 limits inflammation at environmental interfaces.

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    The regulatory T (Treg) cells restrain immune responses through suppressor-function elaboration that is dependent upon expression of the transcription factor Foxp3. Despite a critical role for Treg cells in maintaining lympho-myeloid homeostasis, it remains unclear whether a single mechanism or multiple mechanisms of Treg cell-mediated suppression are operating in vivo and how redundant such mechanisms might be. Here we addressed these questions by examining the role of the immunomodulatory cytokine IL-10 in Treg cell-mediated suppression. Analyses of mice in which the Treg cell-specific ablation of a conditional IL-10 allele was induced by Cre recombinase knocked into the Foxp3 gene locus showed that although IL-10 production by Treg cells was not required for the control of systemic autoimmunity, it was essential for keeping immune responses in check at environmental interfaces such as the colon and lungs. Our study suggests that Treg cells utilize multiple means to limit immune responses. Furthermore, these mechanisms are likely to be nonredundant, in that a distinct suppressor mechanism most likely plays a prominent and identifiable role at a particular tissue and inflammatory setting.

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    Description

    Title : Regulatory T cell-derived interleukin-10 limits inflammation at environmental interfaces.
    Author(s) : Yuri P Rubtsov, Jeffrey P Rasmussen, Emil Y Chi, Jason Fontenot, Luca Castelli, Xin Ye, Piper Treuting, Lisa Siewe, Axel Roers, William R Henderson, Werner Muller, Alexander Y Rudensky
    Abstract : The regulatory T (Treg) cells restrain immune responses through suppressor-function elaboration that is dependent upon expression of the transcription factor Foxp3. Despite a critical role for Treg cells in maintaining lympho-myeloid homeostasis, it remains unclear whether a single mechanism or multiple mechanisms of Treg cell-mediated suppression are operating in vivo and how redundant such mechanisms might be. Here we addressed these questions by examining the role of the immunomodulatory cytokine IL-10 in Treg cell-mediated suppression. Analyses of mice in which the Treg cell-specific ablation of a conditional IL-10 allele was induced by Cre recombinase knocked into the Foxp3 gene locus showed that although IL-10 production by Treg cells was not required for the control of systemic autoimmunity, it was essential for keeping immune responses in check at environmental interfaces such as the colon and lungs. Our study suggests that Treg cells utilize multiple means to limit immune responses. Furthermore, these mechanisms are likely to be nonredundant, in that a distinct suppressor mechanism most likely plays a prominent and identifiable role at a particular tissue and inflammatory setting.
    Keywords : animals, autoimmune diseases, autoimmune diseases genetics, autoimmune diseases immunology, autoimmune diseases prevention & control, colitis, colitis genetics, colitis immunology, colitis prevention & control, female, forkhead transcription factors, fork

    Subject : unspecified
    Area : Other
    Language : English
    Year : 2008

    Affiliations Faculty of Life Science, University of Manchester, Manchester
    Journal : Immunity
    Volume : 28
    Issue : 4
    Publisher : Elsevier
    Pages : 546-558
    Url : http://www.ncbi.nlm.nih.gov/pubmed/18387831

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