CD103 示踪揭示,肠道 CD103 组织驻留记忆 T 细胞是次级感染的主要应答者。
CD103 fate mapping reveals that intestinal CD103 tissue-resident memory T cells are the primary responders to secondary infection.
机构信息
Center for Immunity and Inflammation, Department of Pathology, Immunology, and Laboratory Medicine, New Jersey Medical School, Rutgers-the State University of New Jersey, Newark, NJ, USA.
出版信息
Sci Immunol. 2022 Nov 11;7(77):eabl9925. doi: 10.1126/sciimmunol.abl9925. Epub 2022 Nov 4.
Tissue-resident memory T (T) cells remain poised in the tissue and mediate robust protection from secondary infection. T cells within the intestine and other tissues are heterogeneous in their phenotype and function; however, the contributions of these T subsets to secondary infection remain poorly defined. To address the plasticity of intestinal T subsets and their role in local and systemic immunity, we generated mice to fate map intestinal CD103 T cells and track their location and function during secondary infection with . We found that CD103 T cells remained lodged in the tissue and were poorly reactivated during secondary challenge. CD103 T cells were the primary responders to secondary infection and expanded within the tissue, with limited contribution from circulating memory T cells. The transcriptional profile of CD103 T cells demonstrated maintenance of a gene signature similar to circulating T cells along with increased cytokine production and migratory potential. CD103 T cells also expressed genes associated with T cell receptor (TCR) activation and displayed enhanced TCR-mediated reactivation both in vitro and in vivo compared with their CD103 counterparts. These studies reveal the limited recall potential of CD103 T subsets and the role of CD103 T cells as central memory-like T cells within peripheral tissues.
组织驻留记忆 T(T)细胞在组织中保持待命状态,并能强有力地预防二次感染。肠道和其他组织中的 T 细胞在表型和功能上存在异质性;然而,这些 T 细胞亚群对二次感染的贡献仍未得到明确界定。为了研究肠道 T 细胞亚群的可塑性及其在局部和全身免疫中的作用,我们生成了能够对肠道 CD103 T 细胞进行谱系示踪并在二次感染时跟踪其位置和功能的小鼠。我们发现 CD103 T 细胞仍停留在组织中,在二次挑战时被激活的程度很低。CD103 T 细胞是对二次感染的主要反应者,在组织内扩增,而循环记忆 T 细胞的贡献有限。CD103 T 细胞的转录谱显示,其基因特征与循环 T 细胞相似,同时增加了细胞因子的产生和迁移能力。CD103 T 细胞还表达与 T 细胞受体(TCR)激活相关的基因,并表现出与 CD103 阳性细胞相比,在体外和体内 TCR 介导的再激活增强。这些研究揭示了 CD103 T 细胞亚群的有限召回潜力,以及 CD103 T 细胞在周围组织中作为中央记忆样 T 细胞的作用。