The white blood cell count, platelets, lymphocytes, and levels of haemoglobin, albumin, C3, and C4 were lower in patients with active SLE, whereas the ESR, CRP, BUN, Cr, AST, ALT, anti-dsDNA levels, and urine P/Cr ratio were higher (Table 1). This evidence concerns the gene C4A and systemic lupus erythematosus.