The MFI for the phosphorylation of STAT1 (5A), STAT3 (5B), and STAT5 (5C) in the T cells of SLE patients decreased significantly after IFNα stimulation for 15 min. The MFI for the phosphorylation of STAT1 (5D), STAT3 (5E), and STAT5 (5F) decreased in the B cells of SLE patients after IFNα stimulation for 15 min. The MFI for the phosphorylation of STAT1 (5G) and STAT3 (5H) in the monocytes of SLE patients decreased after IFNα stimulation for 15 min. The MFI for pSTAT3 (5I) decreased significantly in the T cells of SLE patients after IL6 stimulation for 15 min. MFI, mean fluorescence index; SLE, systemic lupus erythematosus; HD, healthy donors; IFNα, interferon α.