Predictive value of urinary neutrophil gelatinase-associated lipocalin and serum ischemia-modified albumin for early diagnosis in patients with contrastinduced acute kidney injury

Abstract

Aim: The aim of this study was to investigate whether urinary neutrophil gelatinase-associated lipocalin (NGAL) and serum ischemia-modified albumin (IMA) levels could serve as early biomarkers of contrast-induced acute kidney injury (CI-AKI) in patients with normal serum creatinine values who undergo coronary angiography (CAG). Methods: This study was conducted in 78 patients undergoing CAG. Urinary NGAL and serum IMA values which measured prior to and 6 hours after CAG were compared with creatinine values that measured prior to and 48 hours after CAG. Results: IMA and NGAL values obtained 6 hours after CAG differed significantly from those obtained at baseline. Statistically significant differences were found between the baseline and 6th-hour values of urinary NGAL and serum IMA (p<0.001). There was no significant difference between baseline and 48th hour serum creatinine levels (p=0.081). In addition, a statistically significant positive correlation was found between pre-processing and 6th-hour NGAL and IMA levels, (r=0.277, p=0.014; r=0.407 and p<0.001, respectively). Conclusion: An increase in urinary NGAL and serum IMA levels were detected without an increase in serum creatinine values which is routinely used in determining CI-AKI. When compared to serum creatinine, urinary NGAL and serum IMA may be early and sensitive biomarkers for predicting CI-AKI.Y