Cutting Edge: 2B4-Mediated Coinhibition of CD4(+) T Cells Underlies Mortality in Experimental Sepsis.
Cutting Edge: 2B4-Mediated Coinhibition of CD4(+) T Cells Underlies Mortality in Experimental Sepsis.
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DOI:
10.4049/jimmunol.1700375
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发表时间:
2017-09-15
期刊:
影响因子:
--
通讯作者:
Ford ML
中科院分区:
文献类型:
--
作者:
Chen CW;Mittal R;Klingensmith NJ;Burd EM;Terhorst C;Martin GS;Coopersmith CM;Ford ML
Sepsis is a leading cause of death in the U.S. but the mechanisms underlying sepsis-induced immune dysregulation remain poorly understood. 2B4 (CD244, SLAM4) is a cosignaling molecule expressed predominantly on NK cells and memory CD8+ T cells that has been shown to regulate T cell function in models of viral infection and autoimmunity. Here we show that 2B4 signaling mediates sepsis lymphocyte dysfunction and mortality. 2B4 expression is increased on CD4+ T cells in both septic animals and human patients at early time points. Importantly, genetic loss or pharmacologic inhibition of 2B4 each significantly increased survival in a murine cecal ligation and puncture (CLP) model. Further, CD4-specific conditional knockouts showed that 2B4 functions on CD4+ T cell populations in a cell-intrinsic manner and modulates both adaptive and innate immune responses during sepsis. Our results illuminate a novel role for 2B4 coinhibitory signaling on CD4+ T cells in mediating immune dysregulation.
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