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首页> 外文期刊>Science Immunology >Infant T cells are developmentally adapted for robust lung immune responses through enhanced T cell receptor signaling
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Infant T cells are developmentally adapted for robust lung immune responses through enhanced T cell receptor signaling

机译:婴儿T细胞通过增强的T细胞受体信号传导在发育中适应了可靠的肺免疫反应

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摘要

Infants require coordinated immune responses to prevent succumbing to multiple infectious challenges during early life, particularly in the respiratory tract. The mechanisms by which infant T cells are functionally adapted for these responses are notwell understood. Here, we demonstrated using an in vivo mouse cotransfer model that infant T cells generated greater numbers of lung-homing effector cells in response to influenza infection compared with adult T cells in the same host, due to augmented Tcell receptor (TCR)–mediated signaling. Mouse infant T cells showed increased sensitivity to low antigen doses, originating at the interface between T cells and antigen-bearing accessory cells—through actin-mediated mobilization of signaling moleculesto the immune synapse. This enhanced signaling was also observed in human infant versus adult T cells. Our findings provide a mechanism for how infants control pathogen load and dissemination, which is important for designing developmentally targeted strategies for promoting immune responses at this vulnerable life stage.
机译:婴儿需要协调的免疫反应,以防止在早期,特别是在呼吸道中屈服于多种感染性挑战。不了解婴儿T细胞在功能上适应这些反应的机制。在这里,我们使用体内小鼠共转移模型证明了婴儿T细胞与同一宿主中的成年T细胞相比,由于增强的TCELN受体(TCR)介导的信号传导,与同一宿主中的成年T细胞相比,对流感感染产生了更多数量的肺伴有效应细胞。 。小鼠婴儿T细胞显示出对低抗原剂量的敏感性,起源于T细胞与抗原辅助辅助细胞之间的界面 - 通过肌动蛋白介导的动员信号分子,免疫突触。在人类婴儿与成人T细胞中也观察到了这种增强的信号传导。我们的发现为婴儿如何控制病原体负荷和传播提供了一种机制,这对于在这个脆弱的生命阶段设计具有发展目标的策略很重要。

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