Inflammation and TCR signal strength determine the breadth of the T cell response in a bim-dependent manner.

Inflammation and TCR signal strength determine the breadth of the T cell response in a bim-dependent manner.
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DOI:
10.4049/jimmunol.1302289
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发表时间:
2014-01-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Prlic M
Prlic M
中科院分区:
其他
文献类型:
--
作者:
Zehn D;Roepke S;Weakly K;Bevan MJ;Prlic M

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通过疫苗接种产生多样化的 T 细胞记忆群是克服病原体表位变异性和对肿瘤抗原耐受性的一种有前景的策略。通过招募高亲和力和低亲和力 T 细胞,效应器和记忆池的 TCR 多样性变得广泛。我们想要确定哪些因素决定记忆 T 细胞库是否具有广泛的和集中的库。我们发现炎症同样会增加低亲和力和高亲和力 T 细胞反应的强度,这反对 TCR 和炎症信号对 T 细胞扩增的协同作用。我们剖析了 TCR 信号强度和炎症的不同影响,并证明它们以 bim 依赖性方式控制效应 T 细胞的存活。重要的是,在炎症环境中,高剂量抗原可以克服 bim 依赖性细胞死亡。我们的数据定义了生成广泛 T 细胞记忆池的框架,为未来的疫苗设计提供信息。
Generating a diverse T-cell memory population through vaccination is a promising strategy to overcome pathogen epitope variability and tolerance to tumor antigens. The effector and memory pool becomes broad in TCR diversity by recruiting high and low affinity T-cells. We wanted to determine which factors dictate whether a memory T-cell pool has a broad vs. focused repertoire. We find that inflammation increases the magnitude of low and high affinity T-cell responses equally well, arguing against a synergistic effect of TCR and inflammatory signals on T cell expansion. We dissect the differential effects of TCR signal strength and inflammation and demonstrate that they control effector T-cell survival in a bim-dependent manner. Importantly, bim-dependent cell death is overcome with a high antigen dose in the context of an inflammatory environment. Our data define the framework for the generation of a broad T-cell memory pool to inform future vaccine design.
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