引言
组织驻留性免疫细胞对维持机体稳态和对抗感染具有重要意义。然而,我们对于组织驻留免疫细胞的构成和特性仍缺乏足够的理解。关于组织驻留免疫细胞的认识大多来自巨噬细胞的研究,在胚胎发育早期,造血祖细胞种植在各种组织并特化发育为独特的巨噬细胞【1】。组织驻留性记忆细胞(tissue-resident memory,Trm)的发现打破了αβT细胞的循环迁移模型【2】。抗原经历的记忆T细胞会长期甚至无限期停留在抗原暴露组织,一旦抗原再次出现迅速做出应答反应。近几年,多篇文献报道组织驻留Treg的重要作用【3】,例如脂肪Treg的维持机体代谢稳态作用【4,5】、肌肉Treg参与肌肉修复【6】、脑Treg驱动少突胶质细胞分化、皮肤Treg抑制纤维化【7,8】和子宫Treg促进胎儿生长【9】等。在表型上类似于Trm,组织Treg同样表达CD69、CD103、CD11a和PD-1。虽然这种相似性支持组织Treg的定植特化模型,但尚缺乏直接的数据。
近日,英国剑桥大学病理学系Adrian Liston研究团队在Immunity杂志在线发表题为The tissue-resident regulatory T cell pool is shaped by transient multi-tissue migration and a conserved residency program的研究文章。该研究通过高维流式细胞术、TCR-seq、RNA-seq和parabiosis分析,向传统定植特化的长期驻留模型发起挑战,提出组织驻留Treg的泛组织迁移模型,为组织Treg提供另一种理解。


模式图(Credit: Immunity)
参考文献
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排版|探索君
文章来源|“BioArt”
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