Fig. 5

Effect of FMN on the differentiation of naive CD4 + T cells into Treg cells in vitro. A The purity of CD4 + T cells was determined using MACS. B, C: FMN promotes the differentiation of naive CD4 + T cells into Treg cells in vitro. D FMN promotes the production of IL-10, a representative cytokine secreted by Treg cells. *p < 0.05, **p < 0.01 compared with the model group