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首页> 外文期刊>Nature immunology >T cell killing does not require the formation of a stable mature immunological synapse
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T cell killing does not require the formation of a stable mature immunological synapse

机译:T细胞杀伤不需要形成稳定的成熟免疫突触

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摘要

A notable feature of T lymphocyte recognition on other cell surfaces is the formation of a stable mature immunological synapse. Here we use a single-molecule labeling method to directly measure the number of ligands a cytotoxic T cell engages and track the consequences of that interaction by three-dimensional video microscopy. Like helper T cells, cytotoxic T cells were able to detect even a single foreign antigen but required about ten complexes of peptide–major histocompatibility complex (pMHC) to achieve full calcium increase and to form a mature synapse. Thus, cytotoxic T cells and helper T cells are more uniform in their antigen sensitivities than previously thought. Furthermore, only three pMHC complexes were required for killing, showing that stable synapse formation and complete signaling are not required for cytotoxicity.
机译:T淋巴细胞在其他细胞表面的识别的显着特征是稳定的成熟免疫突触的形成。在这里,我们使用单分子标记方法直接测量细胞毒性T细胞参与的配体的数量,并通过三维视频显微镜跟踪这种相互作用的结果。像辅助性T细胞一样,细胞毒性T细胞甚至能够检测到单个外源抗原,但需要约十种肽-主要组织相容性复合物(pMHC)的复合物才能使钙充分增加并形成成熟的突触。因此,细胞毒性T细胞和辅助T细胞的抗原敏感性比以前认为的更为均匀。此外,仅需三个pMHC复合物即可杀死,表明细胞毒性不需要稳定的突触形成和完整的信号传导。

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