Molecular properties of gp100-reactive T-cell receptors drive the cytokine profile and antitumor efficacy of transgenic host T cells.

Molecular properties of gp100-reactive T-cell receptors drive the cytokine profile and antitumor efficacy of transgenic host T cells.
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gp100 反应性 T 细胞受体的分子特性驱动转基因宿主 T 细胞的细胞因子谱和抗肿瘤功效。

DOI:
10.1111/pcmr.12724
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发表时间:
2019-01
影响因子:
4.3
通讯作者:
Le Poole IC
Le Poole IC
中科院分区:
医学3区
文献类型:
--
作者:
Eby JM;Smith AR;Riley TP;Cosgrove C;Ankney CM;Henning SW;Paulos CM;Garrett-Mayer E;Luiten RM;Nishimura MI;Baker BM;Le Poole IC

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为了研究T细胞受体(TCR)对产生的T细胞应答的贡献,我们研究了三种不同的人α TCR,其与HLA-A*0201背景下呈递的相同gp 100衍生肽反应。当在原代CD 8 T细胞中表达时,所有受体均引发经典的抗原诱导的IFN-γ应答,其与TCR对肽-MHC的亲和力以T4 H2> R6 C12> SILv 44的顺序相关。然而,SILv 44引发了上级IL-17 A释放。重要的是,在体内,SILv 44转基因T细胞在过继转移到肿瘤攻击小鼠中时介导对888-A2+人黑素瘤肿瘤细胞的上级抗肿瘤应答,同时维持IL-17表达。TCR三元复合物的建模表明SILv 44和其他复合物之间的结构差异,为观察到的差异提供了潜在的结构基础。总的来说,数据揭示了T细胞受体在定义宿主T细胞生理学中比传统假设更突出的作用,而IFN-γ分泌和TCR亲和力之外的参数最终决定了肿瘤反应性T细胞的反应性。
To study the contribution of T-cell receptors (TCR) to resulting T cell responses, we studied three different human α TCRs, reactive to the same gp100-derived peptide presented in the context of HLA-A*0201. When expressed in primary CD8 T cells, all receptors elicited classic antigen-induced IFN-γ responses, which correlated with TCR affinity for peptide-MHC in the order T4H2>R6C12>SILv44. However, SILv44 elicited superior IL-17A release. Importantly, in vivo, SILv44-transgenic T cells mediated superior anti-tumor responses to 888-A2+ human melanoma tumor cells upon adoptive transfer into tumor-challenged mice while maintaining IL-17 expression. Modeling of the TCR ternary complexes suggested architectural differences between SILv44 and the other complexes, providing a potential structural basis for the observed differences. Overall, the data reveal a more prominent role for the T-cell receptor in defining host T-cell physiology than traditionally assumed, while parameters beyond IFN-γ secretion and TCR affinity ultimately determine the reactivity of tumor-reactive T cells.
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