Murine regulatory T cells contain hyperproliferative and death-prone subsets with differential ICOS expression.

Abstract excerpt

Regulatory T cells (Treg) are crucial for self-tolerance. It has been an enigma that Treg exhibit an anergic phenotype reflected by hypoproliferation in vitro after TCR stimulation but undergo vigorous proliferation in vivo. We report in this study that murine Treg are prone to death but hyperproliferative in vitro and in vivo, which is different from conventional CD4(+)Foxp3(-) T cells (Tcon). During in vitro...

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