alexa Stat3 and Stat4 direct development of IL-17-secreting Th cells.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Mathur AN, Chang HC, Zisoulis DG, Stritesky GL, Yu Q,

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Abstract IL-17-secreting CD4(+) T cells are critically involved in inflammatory immune responses. Development of these cells is promoted in vivo and in vitro by IL-23 or TGFbeta1 plus IL-6. Despite growing interest in this inflammatory Th subset, little is known about the transcription factors that are required for their development. We demonstrate that Stat3 is required for programming the TGFbeta1 plus IL-6 and IL-23-stimulated IL-17-secreting phenotype, as well as for RORgammat expression in TGFbeta1 plus IL-6-primed cells. Moreover, retroviral transduction of a constitutively active Stat3 into differentiating T cell cultures enhances IL-17 production from these cells. We further show that Stat4 is partially required for the development of IL-23-, but not TGFbeta1 plus IL-6-primed IL-17-secreting cells, and is absolutely required for IL-17 production in response to IL-23 plus IL-18. The requirements for Stat3 and Stat4 in the development of these IL-17-secreting subsets reveal additional mechanisms in Th cell fate decisions during the generation of proinflammatory cell types.
This article was published in J Immunol and referenced in Journal of Clinical & Cellular Immunology

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