CD+4CD+25 regulatory T cells is an important subpopulation,which can actively mediate immunological tolerance to autoantigen in organism and inhibit anti-tumor immunological response although its mechenism of immunosupression in vivo is not clear.

• CD4+CD2+5调节性T细胞是调节性T细胞的一个重要亚群,它能够以主动性的方式介导机体对自身抗原的免疫耐受以及抑制抗肿瘤免疫应答,但在体内其具体的免疫抑制机制目前还不清楚。