Clustering Class I MHC Modulates Sensitivity of T Cell Recognition1

Clustering Class I MHC Modulates Sensitivity of T Cell Recognition1
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I 类 MHC 聚类调节 T 细胞识别的敏感性1

DOI:
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发表时间:
2006
影响因子:
4.4
通讯作者:
M. Edidin
M. Edidin
中科院分区:
医学2区
文献类型:
--
作者:
David R Fooksman;Gigi Kwik Grönvall;Q. Tang;M. Edidin

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T细胞对肽-MHC的识别是高度特异性的,并且对非常低水平的激动剂肽敏感;然而,尚不清楚这种效应是如何实现或调节的。在这项研究中,我们表明,群集I类MHC分子的细胞表面上的B淋巴母细胞增强其识别小鼠和人类T细胞。我们通过两种方法增加了MHC I分子的聚集,胆固醇消耗和直接交联的二聚MHC构建体。成像显示,两种处理都增加了细胞表面MHC簇的大小和强度。增大的簇与增强的溶解和T细胞效应功能相关。增强是肽特异性的,并且在低浓度的肽下最大。聚集的MHC I类增强了对强和弱激动剂的识别,但不是无效肽。我们的结果表明,细胞表面MHC I类的侧向组织可以调节T细胞识别激动剂肽的敏感性。
T cell recognition of peptide-MHC is highly specific and is sensitive to very low levels of agonist peptide; however, it is unclear how this effect is achieved or regulated. In this study we show that clustering class I MHC molecules on the cell surface of B lymphoblasts enhances their recognition by mouse and human T cells. We increased clustering of MHC I molecules by two methods, cholesterol depletion and direct cross-linking of a dimerizable MHC construct. Imaging showed that both treatments increased the size and intensity of MHC clusters on the cell surface. Enlarged clusters correlated with enhanced lysis and T cell effector function. Enhancements were peptide-specific and greatest at low concentrations of peptide. Clustering MHC class I enhanced recognition of both strong and weak agonists but not null peptide. Our results indicate that the lateral organization of MHC class I on the cell surface can modulate the sensitivity of T cell recognition of agonist peptide.
DOI: 10.1016/s1074-7613(00)80483-5
发表时间: 1996-06-01
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DOI: --
发表时间: 1994
期刊: Journal of immunology (Baltimore, Md. : 1950)
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影响因子: 11.1
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