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    Nat Immunol. 2007 Sep;8(9):958-66. Epub 2007 Aug 5.

    The development of inflammatory T(H)-17 cells requires interferon-regulatory factor 4.

    Brüstle A, Heink S, Huber M, Rosenplänter C, Stadelmann C, Yu P, Arpaia E, Mak TW, Kamradt T, Lohoff M.

    Institut für Medizinische Mikrobiologie und Krankenhaushygiene, 35043 Marburg, Germany.

    Comment in:

    Interferon-regulatory factor 4 (IRF4) is essential for the development of T helper type 2 cells. Here we show that IRF4 is also critical for the generation of interleukin 17-producing T helper cells (T(H)-17 cells), which are associated with experimental autoimmune encephalomyelitis. IRF4-deficient (Irf4(-/-)) mice did not develop experimental autoimmune encephalomyelitis, and T helper cells from such mice failed to differentiate into T(H)-17 cells. Transfer of wild-type T helper cells into Irf4(-/-) mice rendered the mice susceptible to experimental autoimmune encephalomyelitis. Irf4(-/-) T helper cells had less expression of RORgammat and more expression of Foxp3, transcription factors important for the differentiation of T(H)-17 and regulatory T cells, respectively. Altered regulation of both transcription factors contributed to the phenotype of Irf4(-/-) T helper cells. Our data position IRF4 at the center of T helper cell development, influencing not only T helper type 2 but also T(H)-17 differentiation.

    PMID: 17676043 [PubMed - indexed for MEDLINE]

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