T cell receptor signaling strength establishes the chemotactic properties of effector CD8(+) T cells that control tissue-residency.

T cell receptor signaling strength establishes the chemotactic properties of effector CD8(+) T cells that control tissue-residency.
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DOI:
10.1038/s41467-023-39592-1
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发表时间:
2023-07-04
影响因子:
16.6
通讯作者:
Nolz, Jeffrey C.
Nolz, Jeffrey C.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Abdelbary, Mahmoud;Hobbs, Samuel J.;Gibbs, James S.;Yewdell, Jonathan W.;Nolz, Jeffrey C.

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组织驻留记忆 (TRM) CD8+ T 细胞主要源自最近激活的效应 T 细胞,但控制组织微环境内 TRM 分化程度的机制仍未解决。在这里,使用 IFNγ-YFP 报告系统来识别执行抗原依赖性效应功能的 CD8+ T 细胞,我们定义了病毒感染期间皮肤内发生的 TCR 信号强度控制的转录结果和功能机制,以促进 TRM 分化。 TCR 信号传导既增强 CXCR6 介导的迁移,又抑制向 1-磷酸鞘氨醇的迁移,表明在非淋巴组织内遇到二级抗原后会编程“趋化开关”。 Blimp1 被确定为 TCR 重新刺激的关键靶标,它对于建立这种趋化开关和有效发生 TRM 分化是必需的。总的来说,我们的研究结果表明,Blimp1 表达所需的抗原呈递和 TCR 信号强度建立了效应 CD8+ T 细胞的趋化特性,以促进在非淋巴组织内的驻留。 CD8+ T 细胞存在于包括皮肤在内的外周组织中。在这里,作者使用干扰素-γ 报告系统和表达不同亲和力的激动肽的病毒来研究 T 细胞受体信号强度如何改变效应 CD8+ T 细胞的趋化特性以促进组织驻留。
Tissue-resident memory (TRM) CD8+ T cells are largely derived from recently activated effector T cells, but the mechanisms that control the extent of TRM differentiation within tissue microenvironments remain unresolved. Here, using an IFNγ-YFP reporter system to identify CD8+ T cells executing antigen-dependent effector functions, we define the transcriptional consequences and functional mechanisms controlled by TCR-signaling strength that occur within the skin during viral infection to promote TRM differentiation. TCR-signaling both enhances CXCR6-mediated migration and suppresses migration toward sphingosine-1-phosphate, indicating the programming of a ‘chemotactic switch’ following secondary antigen encounter within non-lymphoid tissues. Blimp1 was identified as the critical target of TCR re-stimulation that is necessary to establish this chemotactic switch and for TRM differentiation to efficiently occur. Collectively, our findings show that access to antigen presentation and strength of TCR-signaling required for Blimp1 expression establishes the chemotactic properties of effector CD8+ T cells to promote residency within non-lymphoid tissues. CD8+ T cells are found within peripheral tissues including the skin. Here, the authors use an interferon-gamma reporter system and viruses expressing agonistic peptides of varying affinities to investigate how T cell receptor signaling strength changes the chemotactic properties of effector CD8+ T cells to promote tissue-residency.
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