C4A and systemic lupus erythematosus: These results suggested that the proliferative activity level of some ICPs, such as cMo, eTreg, CXCR5− nB, CXCR5− NSMB, CXCR5− DNB, PB, and PC may reflect the SLEDAI, anti-DNA antibody titer, and C4 levels in SLE pathology.