Sustained suppression by Foxp3+ regulatory T cells is vital for infectious transplantation tolerance.
A paradigm shift in immunology has been the recent discovery of regulatory T cells (T reg cells), of which CD4(+)Foxp3(+) cells are proven as essential to self-tolerance. Using transgenic B6.Foxp3(hCD2) mice to isolate and ablate Foxp3(+) T reg cells with an anti-hCD2 antibody, we show for the first time that CD4(+)Foxp3(+) cells are crucial for infectious tolerance induced by nonablative anti-T cell antibodies. In tolerant animals, Foxp3(+) T reg cells are constantly required to suppress eff...Expand abstract
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