found that both human umbilical cord-MSCs-derived exosomes inhibited T cell proliferation, promoted T cell apoptosis, decreased rorr γ levels, increased forkhead box P3(Foxp3) levels, and regulated Treg/Th17 cell homeostasis, thereby inhibiting synovial proliferation and delaying the progression of RA through in vitro and in vivo experiments (35). The gene discussed is FOXP3; the disease is rheumatoid arthritis.