Value of urinary liver-type fatty acid binding protein in prediction of renal function progression in patients with chronic glomerulonephritis / 中华肾脏病杂志

ABSTRACT

Objective To evaluate the value of urinary liver-type fatty acid binding protein (L-FABP)as a biomarker in prediction of renal function progression in patients with chronic glomerulonephritis (CGN). Methods A total of 123 patients with newly diagnosed CGN by renal biopsy in Shanghai Renji Hospital between 2004 January and 2005 December were enrolled in the study,Twenty-eight healthy subjects were used as control group.Urine samples were collected before biopsy and treatment,and urinary L-FABP was measured by ELISA.The patients with follow-up every three months for 5 years were divided into progressive group and nonprogressive group.The progression of kidney function impairment was defined as a reduction of GFR ≥ 5 ml·min-1·(1.73 m2)-1·year-1 during follow-up.The risk factors of progressive renal function were evaluated and the Spearman correlation analysis was performed to find out the prognostic indicator of renal function deterioration. Results Urinary L-FABP level of CGN patients was significantly higher than that of healthy control group (P＜0.01).Urinary L-FABP in CGN patients was negatively correlated with eGFR (r=-0.565,P＜0.01) and positively correhted with proteinuria (r=0.501,P＜0.01) and Scr (r=0.601,P＜0.01).Kaplan-Meier analysis showed that urinary L-FABP excretion＞76.58 μg/g·cr predicted progression of renal function.The AUC of urinary L-FABP for prognosis of CGN progression was 0.95,with 87.5％ of sensitivity and 90.5％of specificity at the cutoff value of 119.8 μg/g·cr,which revealed its great value of predicting the prognosis of CGN patients. Conclusion Urinary L-FABP can be a novel biomarker of evaluation for renal injury and early progressive renal function deterioration in patients with CGN.