It was found that there was significant positive correlation between SLEDAI in SLE patients and serum levels of CXCL9, CXCL10 or CXCL11 levels (Supporting InformationS1: Table S1), demonstrating that chemokine levels are positively correlated with the disease activity of SLE. The gene discussed is CXCL9; the disease is systemic lupus erythematosus.