DOCK8 deficiency impairs CD8 T cell survival and function in humans and mice.

DOCK8 deficiency impairs CD8 T cell survival and function in humans and mice.
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DOCK8 缺陷会损害人类和小鼠的 CD8 T 细胞存活和功能。

DOI:
10.1084/jem.20110345
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发表时间:
2011-10-24
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Goodnow CC
Goodnow CC
中科院分区:
其他
文献类型:
--
作者:
Randall KL;Chan SS;Ma CS;Fung I;Mei Y;Yabas M;Tan A;Arkwright PD;Al Suwairi W;Lugo Reyes SO;Yamazaki-Nakashimada MA;Garcia-Cruz Mde L;Smart JM;Picard C;Okada S;Jouanguy E;Casanova JL;Lambe T;Cornall RJ;Russell S;Oliaro J;Tangye SG;Bertram EM;Goodnow CC

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如通过对携带DOCK 8失活突变的小鼠和人的分析所示,DOCK 8在病毒感染后初始CD 8 T细胞的存活、LFA-1向免疫突触的极化以及CD 8 T细胞记忆和回忆应答中起细胞自主作用。在人类中,DOCK 8免疫缺陷综合征的特征在于严重的皮肤病毒感染。因此,CD 8 T细胞功能可能在D 0 CK 8不存在的情况下受损。在这项研究中,通过分析突变小鼠和人类,我们证明了DOCK 8在外周CD 8 T细胞存活和功能中的关键内在作用。DOCK 8突变选择性地减少了两个物种中循环幼稚CD 8 T细胞的丰度,并且在DOCK 8缺陷型人类中,大多数CD 8 T细胞显示出耗尽的CD 45 RA + CCR 7 −表型。在小鼠中的分析显示,CD 8 T细胞异常是细胞自主的,主要是胸腺后的。DOCK 8突变体幼稚CD 8 T细胞具有较短的寿命,并且在遇到树突细胞上的抗原时,表现出较差的LFA-1突触极化和第一次细胞分裂的延迟。虽然DOCK 8突变T细胞在体内初次感染重组流感病毒后经历了接近正常的初次克隆扩增,但它们显示出记忆细胞持久性和回忆性大大降低。这些发现强调了DOCK 8在人类和小鼠CD 8 T细胞的存活和功能中的关键作用。
As shown by analysis of mice and humans bearing DOCK8-inactivating mutations, DOCK8 plays a cell-autonomous role in survival of naive CD8 T cells, LFA-1 polarization toward the immune synapse, and CD8 T cell memory and recall responses following viral infection. In humans, DOCK8 immunodeficiency syndrome is characterized by severe cutaneous viral infections. Thus, CD8 T cell function may be compromised in the absence of DOCK8. In this study, by analyzing mutant mice and humans, we demonstrate a critical, intrinsic role for DOCK8 in peripheral CD8 T cell survival and function. DOCK8 mutation selectively diminished the abundance of circulating naive CD8 T cells in both species, and in DOCK8-deficient humans, most CD8 T cells displayed an exhausted CD45RA+CCR7− phenotype. Analyses in mice revealed the CD8 T cell abnormalities to be cell autonomous and primarily postthymic. DOCK8 mutant naive CD8 T cells had a shorter lifespan and, upon encounter with antigen on dendritic cells, exhibited poor LFA-1 synaptic polarization and a delay in the first cell division. Although DOCK8 mutant T cells underwent near-normal primary clonal expansion after primary infection with recombinant influenza virus in vivo, they showed greatly reduced memory cell persistence and recall. These findings highlight a key role for DOCK8 in the survival and function of human and mouse CD8 T cells.
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