Urinary neutrophil gelatinase-associated lipocalin distinguishes pre-renal from intrinsic renal failure and predicts outcomes.
Urinary neutrophil gelatinase-associated lipocalin distinguishes pre-renal from intrinsic renal failure and predicts outcomes.
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DOI:
10.1038/ki.2011.41
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发表时间:
2011-08
影响因子:
19.6
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中科院分区:
文献类型:
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In established acute kidney injury (AKI), serum creatinine poorly differentiates prerenal and intrinsic AKI. A damage-associated nephron biomarker, neutrophil gelatinase-associated lipocalin (NGAL) could be a better discriminator. We tested the hypothesis that urinary NGAL distinguishes intrinsic and prerenal AKI, and tested its performance in the prediction of a composite outcome that included progression to a higher RIFLE (“risk, injury, failure, loss of function, end stage renal disease”) severity class, dialysis, or death. We measured urinary NGAL in 161 hospitalized patients with established AKI using a standardized clinical platform. We excluded 16 patients with postrenal obstruction or insufficient clinical information. Of the remaining 145 patients, 75 patients had intrinsic AKI, 32 patients had prerenal AKI, and 38 patients could not be classified. We found that urinary NGAL levels effectively discriminated intrinsic AKI from prerenal AKI (ROC 0.87, CI 0.81-0.94). An NGAL level >104 μg/L indicated intrinsic AKI (likelihood ratio 5.97), while an NGAL level <47 μg/L made intrinsic AKI unlikely (likelihood ratio 0.2). Patients experiencing the composite outcome had higher median urinary NGAL levels on inclusion (248.2 vs. 68.3 μg/L, p<0.001). In logistic regression analysis, NGAL independently predicted the composite outcome, when corrected for demographics, co-morbidities, creatinine, and RIFLE class. Hence, urinary NGAL is useful in classifying and stratifying patients with established AKI.
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影响因子:
19.6
作者:
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通讯作者:
Bonventre, Joseph V.
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