Cutting edge: Regulatory T cells from lung cancer patients directly inhibit autologous T cell proliferation - PubMed (original) (raw)
Cutting edge: Regulatory T cells from lung cancer patients directly inhibit autologous T cell proliferation
Edward Y Woo et al. J Immunol. 2002.
Abstract
Active suppression by T regulatory cells plays an important role in the down-regulation of T cell responses to foreign and self-Ags. Thus far, the potential role of CD4(+)CD25(+) T cells in human tumors has not been reported. In this work we show that lung tumors contain large numbers of these cells and that they have constitutive high-level expression of CD152 (CTLA-4). Furthermore, the CD4(+)CD25(+) T cells mediate potent inhibition of autologous T cell proliferation. Finally, regulatory T cells from patient tumors failed to inhibit the proliferation of allogeneic T cells. Together these results suggest that the CD4(+)CD25(+) T cells found in lung tumors selectively inhibit the host immune response and therefore could contribute to the progression of lung cancer.
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