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  • Title: Relation of systemic and urinary neutrophil gelatinase-associated lipocalin levels to different aspects of impaired renal function in patients with acute decompensated heart failure.
    Author: Shrestha K, Shao Z, Singh D, Dupont M, Tang WH.
    Journal: Am J Cardiol; 2012 Nov 01; 110(9):1329-35. PubMed ID: 22835414.
    Abstract:
    Both urine and serum neutrophil gelatinase-associated lipocalin (NGAL) reflect active chronic kidney disease and predict acute kidney injury. However, a direct comparison of these markers in acute decompensated heart failure has not been performed. We prospectively evaluated 93 patients admitted with acute decompensated heart failure and treated with intravenous furosemide and measured both systemic (serum) and urine NGAL levels and their corresponding markers of estimated glomerular filtration rate, natriuresis (urine sodium), and diuretic response (net output, urine sodium/furosemide ratio). In our study cohort, the median urine and serum NGAL level was 34 ng/ml (interquartile range 24 to 86) and 252 ng/ml (interquartile range 175 to 350), respectively. The urine and serum NGAL levels correlated modestly (r = 0.37, p <0.001). Higher urine (but not systemic) NGAL correlated with the markers of impaired natriuresis and reduced diuresis (p <0.005 for all). In contrast, higher serum NGAL demonstrated a stronger relation with reduced glomerular filtration function (p <0.0001). Both markers predicted acute kidney injury (urine NGAL, odds ratio 1.7, p = 0.035; serum NGAL, odds ratio 1.9, p = 0.009). In conclusion, in patients with acute decompensated heart failure, urine NGAL levels reflect renal distal tubular injury with impaired natriuresis and diuresis, and systemic NGAL levels demonstrate a stronger association with glomerular filtration function. Both systemic and urine NGAL predict worsening renal function.
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