A role for the transcriptional repressor Blimp-1 in CD8(+) T cell exhaustion during chronic viral infection.
A role for the transcriptional repressor Blimp-1 in CD8(+) T cell exhaustion during chronic viral infection.
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DOI:
10.1016/j.immuni.2009.06.019
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发表时间:
2009-08-21
期刊:
影响因子:
32.4
通讯作者:
Wherry, E. John
中科院分区:
文献类型:
--
作者:
Shin, Haina;Blackburn, Shawn D.;Intlekofer, Andrew M.;Kao, Charlly;Angelosanto, Jill M.;Reiner, Steven L.;Wherry, E. John
T cell exhaustion is common during chronic infections and can prevent optimal immunity. While recent studies have demonstrated the importance of inhibitory receptors and other pathways in T cell exhaustion, the underlying transcriptional mechanisms are unknown. Here, we define a role for the transcription factor Blimp-1 in CD8 T cell exhaustion during chronic viral infection. Blimp-1 repressed key aspects of normal memory CD8 T cell differentiation and promoted high expression of inhibitory receptors during chronic infection. These cardinal features of CD8 T cell exhaustion were corrected by conditionally deleting Blimp-1. While high expression of Blimp-1 fostered aspects of CD8 T cell exhaustion, haploinsufficiency indicated that moderate Blimp-1 expression sustained some effector function during chronic viral infection. Thus, we identify Blimp-1 as a transcriptional regulator of CD8 T cell exhaustion during chronic viral infection and propose that Blimp-1 acts as a transcriptional rheostat balancing effector function and T cell exhaustion.
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