Complement receptor CD46 co-stimulates optimal human CD8(+) T cell effector function via fatty acid metabolism.

Complement receptor CD46 co-stimulates optimal human CD8(+) T cell effector function via fatty acid metabolism.
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DOI:
10.1038/s41467-018-06706-z
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发表时间:
2018-10-10
影响因子:
16.6
通讯作者:
Kemper C
Kemper C
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Arbore G;West EE;Rahman J;Le Friec G;Niyonzima N;Pirooznia M;Tunc I;Pavlidis P;Powell N;Li Y;Liu P;Servais A;Couzi L;Fremeaux-Bacchi V;Placais L;Ferraro A;Walsh PR;Kavanagh D;Afzali B;Lavender P;Lachmann HJ;Kemper C

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人CD 4 + Th 1细胞的诱导需要补体受体CD 46与CD 4 + T细胞-内源性NLRP 3炎性体直接串扰的自分泌刺激。然而,目前尚不清楚人类细胞毒性CD 8 + T细胞(CTL)的反应是否也依赖于一个内在的补体-炎性体轴。在这里,我们表明,使用来自CD 46缺乏症或具有组成性活性NLRP 3的患者的CTL,CD 46通过增加营养流入和脂肪酸合成来传递最佳CTL活性的共刺激信号。令人惊讶的是,尽管CTL表达NLRP 3,但正常的人CTL活性不需要典型的NLRP 3炎性体,因为来自具有过度活跃的NLRP 3活性的患者的CTL功能正常。这些发现确立了自分泌补体和CD 46活性作为正常人类CTL生物学的组成部分,并且由于CD 46仅存在于人类中,因此强调了小鼠和男性之间先天免疫传感器的不同作用。补体在用于去除循环中的病原体的同时,对于与炎性体协同调节CD 4 T细胞活化也是重要的。在这里,作者表明,CD 46是一种仅在人类中表达的补体受体,对于诱导人类CD 8 T细胞的最佳活化和效应功能至关重要。
The induction of human CD4+ Th1 cells requires autocrine stimulation of the complement receptor CD46 in direct crosstalk with a CD4+ T cell-intrinsic NLRP3 inflammasome. However, it is unclear whether human cytotoxic CD8+ T cell (CTL) responses also rely on an intrinsic complement-inflammasome axis. Here we show, using CTLs from patients with CD46 deficiency or with constitutively-active NLRP3, that CD46 delivers co-stimulatory signals for optimal CTL activity by augmenting nutrient-influx and fatty acid synthesis. Surprisingly, although CTLs express NLRP3, a canonical NLRP3 inflammasome is not required for normal human CTL activity, as CTLs from patients with hyperactive NLRP3 activity function normally. These findings establish autocrine complement and CD46 activity as integral components of normal human CTL biology, and, since CD46 is only present in humans, emphasize the divergent roles of innate immune sensors between mice and men. Complement, while serving to remove pathogens in the circulation, is also important for synergizing with inflammasomes to modulate CD4 T cell activation. Here the authors show that CD46, a complement receptor expressed only in humans, is essential for inducing optimal activation and effector functions of human CD8 T cells.
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T 辅助细胞 1 免疫需要 CD4⁺ T 细胞中补体驱动的 NLRP3 炎性体活性。
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