CD4+CD25+Treg细胞具有免疫失能活性,经体外非特异性和体内特异性抗原激活后,通过细胞接触依赖或细胞因子非依赖方式抑制自身反应性T细胞或效应性T细胞增殖/应答反应,发挥免疫抑制活性,进而控制过度的免疫应答、诱导自身免疫耐受、维持免疫稳态,具体的作用机制尚在进一步研究及 CD4 + CD25 + Treg cells have immunodeficiency activity that inhibits autoreactive T-cell or effector T-cell proliferation / response responses in a cell-dependent or cytokine-independent manner upon activation by an extracellular nonspecific and in vivo specific antigen, To play an immunosuppressive activity, thereby controlling excessive immune response, induction of autoimmune tolerance, to maintain immune homeostasis, the specific mechanism of action is still under study and