调节性T细胞是维持机体免疫稳态的CD4+ T细胞亚群，也是肿瘤微环境中免疫抑制屏障的主要构成细胞。因此，特异性地调控肿瘤微环境的Treg细胞使其功能与稳定性发生改变，将能够促进肿瘤杀伤反应的发生。

One cluster displayed a Treg phenotype ... of CD8 T cells in TDLNs and triggered a powerful anti-tumor response. "In around 10% of patients where the stem-like CD4 cell is active, there is ...

Ovarian tumors are infiltrated by both effector (CD4+CD25-) T cells and by an excess of TREG cells (CD4+CD25+). These TREG cells impede the function of the effectors in combating the tumor.