Compared with HCs, the expressions of apolipoprotein B (APOB), apolipoprotein C (APOC), apolipoprotein D (APOD), apolipoprotein E (APOE) and apolipoprotein L1 (APOL1) were increased in SLE patients (Figure 6B). This evidence concerns the gene APOL1 and systemic lupus erythematosus.