T Cell Calcium Signaling Regulation by the Co-Receptor CD5.

T Cell Calcium Signaling Regulation by the Co-Receptor CD5.
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DOI:
10.3390/ijms19051295
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发表时间:
2018-04-26
影响因子:
5.6
通讯作者:
Weber KS
Weber KS
中科院分区:
生物学2区
文献类型:
--
作者:
Freitas CMT;Johnson DK;Weber KS

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钙内流对T细胞效应的功能和命运至关重要。当T细胞受体(TCRs)与抗原呈递细胞(APC)呈递的肽结合时,T细胞被激活,导致细胞内钙(Ca2+)浓度增加。共受体稳定TCR与其配体,肽-主要组织相容性复合体(pMHC)之间的相互作用,并增强Ca2+信号传导和T细胞活化。相反,一些共受体可以抑制Ca2+信号传导并抑制T细胞活化。免疫检查点疗法阻断抑制性共受体,如细胞毒性T淋巴细胞相关抗原4 (CTLA-4)和程序性死亡1 (PD-1),以增加T细胞Ca2+信号传导并促进T细胞存活。与CTLA-4和PD-1类似,已知共受体CD5作为T细胞激活的负调节因子,并改变Ca2+信号传导和T细胞功能。虽然我们对CD5在B细胞中的作用了解甚多,但最近的研究扩大了我们对CD5在T细胞中的功能的了解。在这里,我们回顾了这些最近的发现,并讨论了我们对CD5 Ca2+信号调控的改进理解如何有助于基础和临床研究。
Calcium influx is critical for T cell effector function and fate. T cells are activated when T cell receptors (TCRs) engage peptides presented by antigen-presenting cells (APC), causing an increase of intracellular calcium (Ca2+) concentration. Co-receptors stabilize interactions between the TCR and its ligand, the peptide-major histocompatibility complex (pMHC), and enhance Ca2+ signaling and T cell activation. Conversely, some co-receptors can dampen Ca2+ signaling and inhibit T cell activation. Immune checkpoint therapies block inhibitory co-receptors, such as cytotoxic T-lymphocyte associated antigen 4 (CTLA-4) and programmed death 1 (PD-1), to increase T cell Ca2+ signaling and promote T cell survival. Similar to CTLA-4 and PD-1, the co-receptor CD5 has been known to act as a negative regulator of T cell activation and to alter Ca2+ signaling and T cell function. Though much is known about the role of CD5 in B cells, recent research has expanded our understanding of CD5 function in T cells. Here we review these recent findings and discuss how our improved understanding of CD5 Ca2+ signaling regulation could be useful for basic and clinical research.
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