TGFB1 and systemic lupus erythematosus: In our study, the results showed that in newly diagnosed SLE patients with mild or moderate disease activity who were not under any treatment, anti-inflammatory cytokines as well as inhibitory molecules (as suppressive indicators of B cells) expression increased by isolated B cells in compared to healthy subjects and by increasing the SLEDAI score, serum levels of IL-10 and TGF-β decreased remarkably.