PTX3 and lupus nephritis: The urinary PTX3 levels were significantly higher in active lupus nephritis group compared with lupus nephritis patients in remission and normal controls (1.929 (0.001–112.506) vs. 0.068 (0.001–3.031) ng/mg Cr, P = 0.011; 1.929 (0.001–112.506) vs. 0.023 (0.002–1.143) ng/mg Cr, P = 0.008).