CD4(+)CD25(+) regulatory T (T reg) cells play a pivotal role in control of the immune response. Transforming growth factor-beta (TGF-beta) has been shown to be required for T reg cell activity; however, precisely how it is involved in the mechanism of suppression is poorly understood. Using the T cell transfer model of colitis, we show here that CD4(+)CD45RB(high) T cells that express a dominant negative TGF-beta receptor type II (dnTbetaRII) and therefore cannot respond to TGF-beta, escape c...Expand abstract
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T cells that cannot respond to TGF-beta escape control by CD4(+)CD25(+) regulatory T cells.
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