A study conducted on SLE patients from Brazil showed an association between rs1130864 CRP polymorphism and SLE susceptibility [39], while Enocsson et al. reported that IFN-α downregulates CRP expression, and the rs1205 CRP polymorphism could explain the low basal CRP and the inadequate CRP responses among active SLE patients [40]. This evidence concerns the gene IFNA1 and systemic lupus erythematosus.