CCR5 and systemic lupus erythematosus: CD16+ monocytes from patients with SLE were characterized by lower expression of HLA-DR (P < 0.05) but higher CD163 and CCR5 (P < 0.001) expression compared with the monocytes from control donors (P < 0.001) (Figures 3C–E; Table S2 in Supplementary Material).