In SLE patients, the percentages of induced CD4+CD25highFoxp3+ T cells in TGF-β + IgG and TGF-β + CD200Fc groups were 0.93 ± 0.50% and 6.23 ± 0.72% (P = 0.013). Here, TGFB1 is linked to systemic lupus erythematosus.