Mucosal memory CD8⁺ T cells are selected in the periphery by an MHC class I molecule.

Mucosal memory CD8⁺ T cells are selected in the periphery by an MHC class I molecule.
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DOI:
10.1038/ni.2106
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发表时间:
2011-10-02
期刊:
影响因子:
30.5
通讯作者:
--
中科院分区:
医学1区
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--
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在病原体进入位点存在免疫记忆是保护的先决条件。然而,保证外围接口抗扰性的机制尚不清楚。在这里,我们表明,非经典的MHC I类分子,胸腺白血病抗原(TL),诱导树突状细胞与活化的CD 8 αβ+T细胞上的CD 8 αα相互作用,介导的记忆前体细胞的亲和力为基础的选择。此外,TL在上皮细胞上的组成性表达导致对成熟CD 8 αβ记忆T细胞的持续选择。TL-CD 8 αα驱动的记忆过程对于肠道中记忆性CD 8 αβ T细胞的产生和高度抗原敏感性CD 8 αβ记忆性T细胞的积累至关重要,这些记忆性T细胞在病原体的最大入口处形成第一道防线。
The presence of immune memory at pathogen entry sites is a prerequisite for protection. Nevertheless, the mechanisms that warrant immunity at peripheral interfaces are not understood. Here we show that the non-classical MHC class I molecule, the thymus leukemia antigen (TL), induced on dendritic cells interacting with CD8αα on activated CD8αβ+T cells, mediated affinity-based selection of memory precursor cells. Furthermore, constitutive expression of TL on epithelial cells led to continued selection of mature CD8αβ memory T cells. The TL-CD8αα-driven memory process was essential for the generation of memory CD8αβ T cells in the intestine and accumulation of highly antigen sensitive CD8αβ memory T cells that form the first line of defense at the largest entry port for pathogens.
CD8BETA通过将T细胞受体/CD3与筏相关的CD8/p56(LCK)配合物耦合,使CD8具有有效的共感受器功能。
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影响因子: --
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