TNFRSF17 and systemic lupus erythematosus: BCMA was increased in the B cell subsets of SLE patients: rNAV (0.21% vs 0.07%, p = 0.0009) and CXCR5+ CD11c- SWM (0.24% vs 0.15%, p = 0.0288) compared to HS (Figures 3F, G).