Abstract
CD4+CD25+ T cells expressing forkhead transcription factor Foxp3 are recognized as professional regulatory T cells (Tregs) and are instrumental in the induction and maintenance of immune tolerance. In addition to their development intrathymically, CD4+ CD25+Foxp3+ Tregs may also be converted extrathymically from CD4+CD25– naïve T cells through induction of Foxp3 by transforming growth factor–beta (TGF-β). Most recently, an interleukin-17 (IL-17)-producing pro-inflammatory T helper (Th) subset, designated Th17, has been identified. Unexpectedly, the differentiation of Th17 cells from CD4+CD25– naïve T cells also requires TGF-β, but in the presence of the proinflammatory cytokine interleukin-6 (IL-6). The transcription factor that programs and directs Th17 cell differentiation includes retinoic-acid-related orphan receptor-γt (RORrt), which is induced by the combined signals from both IL-6 and TGF-β engagement. This chapter attempts to highlight the discovery and development of the TGF-β reciprocal regulation of Tregs and Th17 cells.
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This research was supported by the Intramural Research Program of the NIH, National Institute for Dental and Craniofacial Research.
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Chen, W. (2008). TGF-β Regulates Reciprocal Differentiation of CD4+CD25+Foxp3+ Regulatory T Cells and IL-17-Producing Th17 Cells from Naïve CD4+CD25– T Cells. In: Jiang, S. (eds) Regulatory T Cells and Clinical Application. Springer, New York, NY. https://doi.org/10.1007/978-0-387-77909-6_7
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