Regulatory T (Treg) cells is an indispensable subset of T lymphocyte with the ability of immunosuppression in the periphery.Thymus-derived Treg cells(CD4+CD25+FOXP3+Treg cells) play a fundamental role in maintaining immune homeostasis in vivo.Treg cells have been actively involved in the onset and development of major human diseases including malignant tumors, autoimmune diseases,infectious diseases,allergic diseases and graft versus host disease(GVHD).Exosomes are membranous vesicles of endosomal origin that released from multiple cells into the extracellular space.They are currently considered to be vehicles containing protein,RNA and MicroRNA which can been transferred to recipient cells to modulate their activity by cell-contact-independent mecha-nism.Exosomes have a great impact on the induction and proliferation of Treg cells,understanding the relation of them will lead to novel therapeutic approaches for cancer immunotherapy,treating autoimmunity,infection,allergy and organ transplantation.%调节性T细胞(regulatory T cell,Treg cell)是T细胞中一类具有免疫抑制功能的T细胞亚型,其中最关键的亚型是胸腺起源并表达CD4、CD25以及转录因子FOXP3+的CD4+CD25+FOXP3+调节性T细胞(CD4+CD25+FOXP3+Treg cell).调节性T细胞对维持体内免疫稳态极其重要,与多种重大疾病如恶性肿瘤、自身免疫性疾病、感染性疾病、过敏性疾病、移植排斥的发生发展密切相关.外泌体(Exosome)是一种可由多种细胞分泌的微型盘状囊泡,通过其囊内包裹的蛋白质、mRNA、微小RNA(microRNA)等物质,在细胞间通信,特别是非接触性的细胞远程调控发挥作用.目前研究发现:外泌体对调节性T细胞的诱导发育,增殖及发挥免疫抑制能力具有一定的影响,深入了解两者之间的联系有利于为将来治疗恶性肿瘤、自身免疫性等疾病提供创新性线索.
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