Unexpected positive control of NFκB and miR-155 by DGKα and ζ ensures effector and memory CD8+ T cell differentiation.

Unexpected positive control of NFκB and miR-155 by DGKα and ζ ensures effector and memory CD8+ T cell differentiation.
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DOI:
10.18632/oncotarget.8164
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发表时间:
2016-06-07
期刊:
影响因子:
--
通讯作者:
Zhong XP
Zhong XP
中科院分区:
其他
文献类型:
--
作者:
Yang J;Zhang P;Krishna S;Wang J;Lin X;Huang H;Xie D;Gorentla B;Huang R;Gao J;Li QJ;Zhong XP

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来自T细胞受体(TCR)和γ链细胞因子受体的信号在启动CD 8 T细胞的活化和效应/记忆分化中起关键作用。我们在这里报告,同时删除二酰基甘油激酶(DGK)α和DKO(DKO)严重损害了单核细胞增生李斯特菌感染后CD 8效应T细胞的扩增和记忆CD 8 T细胞的形成。此外,预先形成的记忆性CD 8 T细胞中DGKα和CD 8 α的消融引发了这些细胞的死亡和受损的稳态增殖。由于趋化因子受体的表达减少和向引流淋巴结的迁移,DKO CD 8 T细胞在引发中受损。此外,DKO CD 8 T细胞意外地在NFκ B介导的miR-155转录物中存在缺陷,导致SOCS 1过度表达和γ链细胞因子信号传导受损。我们的数据鉴定了DGK-NFκB-miR-155-SOCS 1轴,其桥接TCR和γ-链细胞因子信号传导,用于对细菌感染的稳健的CD 8 T细胞初级和记忆应答。
Signals from the T-cell receptor (TCR) and γ-chain cytokine receptors play crucial roles in initiating activation and effector/memory differentiation of CD8 T-cells. We report here that simultaneous deletion of both diacylglycerol kinase (DGK) α and ζ (DKO) severely impaired expansion of CD8 effector T cells and formation of memory CD8 T-cells after Listeria monocytogenes infection. Moreover, ablation of both DGKα and ζ in preformed memory CD8 T-cells triggered death and impaired homeostatic proliferation of these cells. DKO CD8 T-cells were impaired in priming due to decreased expression of chemokine receptors and migration to the draining lymph nodes. Moreover, DKO CD8 T-cells were unexpectedly defective in NFκB-mediated miR-155 transcript, leading to excessive SOCS1 expression and impaired γ-chain cytokine signaling. Our data identified a DGK-NFκB-miR-155-SOCS1 axis that bridges TCR and γ-chain cytokine signaling for robust CD8 T-cell primary and memory responses to bacterial infection.
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