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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Transforming Growth Factor-beta Controls Development, Homeostasis, and Tolerance of T Cells by Regulatory T Cell-Dependent and -Independent Mechanisms.

The role of transforming growth factor-beta ( TGF-beta) in inhibiting T cell functions has been studied with dominant-negative TGF-beta receptor transgenic models; however, the full impact of TGF-beta signaling on T cells and the mechanisms by which TGF-beta signals remain poorly understood. Here we show that mice with T cell-specific deletion of TGF-beta receptor II developed lethal inflammation associated with T cell activation and differentiation. In addition, TGF-beta signaling positively regulated T cell development and homeostasis. Development of CD8(+) T cells and NKT cells, maintenance of peripheral Foxp3-expressing regulatory T cells, and survival of CD4(+) T cells all depended on TGF-beta signaling. Both T helper 1 ( Th1) differentiation and survival of activated CD4(+) T cells required T-bet, the TGF-beta-regulated transcription factor, which controlled CD122 expression and IL-15 signaling in Th1 cells. This study reveals pleiotropic functions of TGF-beta signaling in T cells that may ensure a diverse and self-tolerant T cell repertoire in vivo.[1]


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