Further analysis indicated that, in the patients with lupus nephritis, the levels of urinary mCRP were significantly correlated with serum creatinine (r = 0.460, P < 0.001), urinary NGAL levels (r = 0.390, P < 0.001) and urinary KIM-1 levels (r = 0.227, P = 0.028) (Figure S2 A2, B2). The gene discussed is LCN2; the disease is lupus nephritis.