The relationships of MECP2 rs2734647 genotypes CC (n = 34) and CT + TT (n = 13) with various parameters in SLE patients without nephritis show that carriers of CT + TT have noticeably lower vitamin A levels (p = 0.012) (Figure 1d) and elevated ACR (p = 0.006) (Figure 1e) and showed better drug response to chloroquine phosphate 11 (84.6%) than C allele carriers 10 (29.4%) (p = 0.001) (Figure 1f). Here, MECP2 is linked to systemic lupus erythematosus.