HVEM过表达树突状细胞对自身免疫性心肌炎的作用

目的 探讨单纯疱疹病毒进入介导子(herpes virus entry mediator,HVEM)基因修饰的树突状细胞(dendritic cells,DC)能否防治肌凝蛋白诱导的小鼠心肌炎模型,并分析其机制.方法 以肌凝蛋白加弗氏佐剂免疫小鼠制备实验性自身免疫性心肌炎(EAM)动物模型,通过小鼠尾静脉输注肌凝蛋白冲击的HVEM基因修饰的DC,观察其对心肌炎的免疫保护作用,并探讨其可能机制.结果 HVEM基因修饰的DC能够抑制自身免疫应答造成的小鼠心肌损伤,其机制主要是通过分泌IL-10,并诱导产IL-10调节性T细胞(Tr1)抑制自身反应性T细胞的活化.结论 HVEM基因修饰的DC能抑制EAM的发生,并且HVEM介导的信号网络可能在不同的细胞中产生不同的作用.

Amelioration of experimental autoimmune myocarditis by HVEM-overexpressing dendritic cells through induction of IL-10-producing cells

Objective To assess the efficacy of herpes virus entry mediator (HVEM) gene modifled dendritic cells (DCs) in protecting against myosin induced myocarditis,and to investigate the involving mechanism.Methods We treated experimental autoimmune myocarditis (EAM) mice with myosin-pulsed DCs which were transfected with HVEM-expressing adenovirus (Ad-HVEM) or control vectors,then evaluated myocarditis,plasm cTn and autoantibody by histopathology,fluoroimmunoassay,and ELISA,respectively.Results We found that DCs transfected with Ad-HVEM (DC-Ad-HVEM) could protect against EAM.Further study showed DC-Ad-HVEM could produce regulatory cytokine IL-10,and IL-10 promoted the production of a key regulatory T cell subset which is important in peripheral tolerance.The T cells mediated protection against EAM.Conclusion This study suggest that myosin-DC-Ad-HVEM cell gene therapy is a safe and effective way for inhibiting the development of EAM,and the signal net mediated by HVEM plays different roles in different cells.