In SLE patients, IL-10 concentration correlated with sCD40L levels and with the percentages of CD19+PLT+, CD4+PLT+, and CD8+PLT+ cells (Figures 4(c)–4(f)), but not in HD (r = 0.33, p = 0.41 for sCD40L; r = 0.58, p = 0.12 for CD19+PLT+; r = 0.52, p = 0.18 for CD4+PLT+, and r = 0.67, p = 0.067 for CD8+PLT+). This evidence concerns the gene CD19 and systemic lupus erythematosus.