2D TCR-pMHC-CD8 kinetics determines T-cell responses in a self-antigen-specific TCR system.

2D TCR-pMHC-CD8 kinetics determines T-cell responses in a self-antigen-specific TCR system.
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DOI:
10.1002/eji.201343774
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发表时间:
2014-01
影响因子:
5.4
通讯作者:
Krogsgaard, Michelle
Krogsgaard, Michelle
中科院分区:
医学3区
文献类型:
--
作者:
Liu, Baoyu;Zhong, Shi;Malecek, Karolina;Johnson, Laura A.;Rosenberg, Steven A.;Zhu, Cheng;Krogsgaard, Michelle

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Two-dimensional (2D) kinetic analysis directly measures molecular interactions at cell-cell junctions, thereby incorporating inherent cellular effects. By comparison, three-dimensional (3D) analysis probes the intrinsic physical chemistry of interacting molecules isolated from the cell. To understand how T-cell tumor reactivity relates to 2D and 3D binding parameters and to directly compare them, we performed kinetic analyses of a panel of human T-cell receptors (TCR) interacting with a melanoma self-antigen peptide (gp100209–217) bound to major histocompatibility complex (pMHC) in the absence and presence of coreceptor CD8. We found that while 3D parameters are inadequate to predict T-cell function, 2D parameters (which do not correlate with their 3D counterparts) show a far broader dynamic range and significantly improved correlation with T-cell function. Thus, our data support the general notion that 2D parameters of TCR–pMHC–CD8 interactions determine T-cell responsiveness and suggest a potential 2D-based strategy to screen TCRs for tumor immunotherapy.
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