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固有淋巴细胞研究进展 被引量:3

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摘要 人体内存在着数万亿的共生菌,免疫系统却似乎对它们视而不见,机体这种维持“免疫休战”状态的重要机制之一就与固有淋巴细胞( innate lymphoid cells,ILCs)有关。固有淋巴细胞是一类新近定义的细胞家族,起源于共同淋巴样祖细胞( CLP ),在形态学上类似于淋巴细胞,但不表达成熟淋巴细胞表面表达的由重排基因编码的特异性抗原受体[1],其分化发育依赖转录因子Id2,表达IL-2受体γ链[2],分泌一系列类似于Th细胞分泌的细胞因子:IL-5、IL-13、IL-17和/或IL-22等[3],被认为是Th细胞的“镜像细胞”[1]。 ILCs的谱系分化、功能以及修复依赖于转录因子,不同转录因子的表达调节特有ILCs亚群的发育程序,赋予不同亚群特定的效应功能。根据表达特定的转录因子和细胞因子,ILCs分为3个亚群:(1) ILC1:表达 T-box 转录因子 T-bet 和/或Eomes,经 IL-12刺激后产生 IFN-γ。包括 cNK 细胞、NKp44+CD103+细胞等。(2) ILC2:在生长发育和功能作用的过程中依赖转录因子 GATA3和RORα,分泌2型细胞因子IL-5和IL-13,包括自然辅助免疫细胞( natural helper cells, NH cells)、nuo-cytes、MPPtype2细胞或固有辅助细胞( innate helper, ih2)。(3) ILC3:表达转录因子RORγt,分泌IL-22、IL-17A或IL-17F,也称为RORγt+ILCs。 ILCs大量存在于黏膜组织中,在机体抗病原体固有免疫应答淋巴样组织形成组织重塑以及修复中发挥重要作用,组成抵抗入侵病原菌的第一道防线。本篇就IL-Cs的研究进展做一综述。
出处 《中华微生物学和免疫学杂志》 CAS CSCD 北大核心 2014年第10期803-810,共8页 Chinese Journal of Microbiology and Immunology
基金 国家自然基金(31070808) 国家高技术研究发展计划(863计划)(课题编号:2014AA020708)
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同被引文献37

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