Abstract
Early identification of patients with acute kidney injury (AKI) being at high risk for adverse outcome can influence medical treatment. This study compares urinary calprotectin, kidney injury molecule-1 (KIM-1), and neutrophil gelatinase-associated lipocalin (NGAL) for their performance in predicting mortality and need for renal replacement therapy (RRT) in pediatric AKI patients. Urinary biomarker concentrations were assessed prospectively in 141 subjects aged 0–18 years including 55 patients with established AKI according to pediatric Risk, Injury, Failure, Loss, and End-stage kidney disease (pRIFLE) criteria, 27 patients without AKI, and 59 healthy children. Within the AKI group, receiver operating characteristic (ROC) curve analysis revealed moderate to poor performance of calprotectin and KIM-1 in the prediction of 30-day mortality (calprotectin area under the curve (AUC) 0.55; KIM-1 AUC 0.55) and 3-month mortality (calprotectin AUC 0.61; KIM-1 AUC 0.60) and fair performance in the prediction of RRT requirement (calprotectin AUC 0.72; KIM-1 AUC 0.71). Urinary NGAL showed good performance in predicting 30-day (AUC 0.79) and 3-month (AUC 0.81) mortality and moderate performance in predicting RRT (AUC 0.61).
Conclusions: Whereas urinary calprotectin and KIM-1 can be useful for the prediction of RRT, urinary NGAL has a good diagnostic performance in predicting mortality in pediatric patients with AKI of heterogeneous etiology.
What is known: • There is increasing evidence that urinary biomarkers like neutrophil gelatinase-associated lipocalin (NGAL) and kidney injury molecule-1 (KIM-1) are valuable for the prediction of adverse outcome in adult acute kidney injury (AKI), whereas data on pediatric AKI is scarce. |
What is new: • Urinary calprotectin and KIM-1 do not predict mortality in our heterogeneous pediatric AKI cohort, but they show moderate performance in the prediction of dialysis. • Urinary NGAL is a good predictor of mortality performing better than pRIFLE stage, eGFR, or creatinine, but it shows moderate performance in the prediction of dialysis. |
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Abbreviations
- AKI:
-
acute kidney injury
- AUC:
-
area under the curve
- eCCl:
-
estimated creatinine clearance
- HUS:
-
hemolytic uremic syndrome
- KDIGO:
-
Kidney Disease: Improving Global Outcomes
- KIM-1:
-
kidney injury molecule-1
- NGAL:
-
neutrophil gelatinase-associated lipocalin
- pRIFLE:
-
pediatric Risk, Injury, Failure, Loss, and End-stage kidney disease
- ROC:
-
receiver operating characteristic
- RRT:
-
renal replacement therapy
- SCr:
-
serum creatinine
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Acknowledgements
We thank Simone Voigt for her indefatigable efforts in this study. We are indebted to all children and their parents who participated in the study.
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JHW, AF, and THW conceived and designed the experiments. JHW, SW and AF performed the experiments. JHW, AF, THW, BT, FSS, and FB analyzed the data or interpreted the results. JHW, AF, BT, and THW wrote the draft of the article. All other authors commented on the manuscript.
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Funding
The study was funded by the German Research Foundation (Research Unit FOR1368).
Conflict of interest
T.H.W. declares that patent “Assay method for intrinsic acute kidney injury” is granted. T.H.W. received speakers’ honoraria and/or research grants from Astellas, Novartis, Bristol-Myers Squibb, Pfizer, and Sanofi. All authors declare that they have no conflicts of interest.
Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Written informed consent was obtained by legal guardians of each patient with assent from the patient when appropriate for all individual participants included in the study.
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Communicated by Mario Bianchetti
Electronic supplementary material
Online Resource Table 1
Hosmer–Lemeshow goodness-of-fit test for biomarker calibration. (PDF 172 kb)
Online Resource Table 2
Urinary calprotectin, KIM-1, and NGAL in neonates and children stratified for pRIFLE stage. (PDF 42 kb)
Online Resource Table 3
Prognostic accuracy of urinary biomarker/urinary creatinine ratios in predicting mortality and need for RRT in pediatric AKI. (PDF 214 kb)
Online Resource Table 4
Prognostic accuracy of urinary calprotectin, KIM-1, and NGAL in predicting mortality and RRT in neonates and children. (PDF 46 kb)
Online Resource Table 5
Urinary calprotectin, KIM-1, and NGAL in the prediction of adverse outcomes in neonates classified by the neonatal-modified KDIGO definition of AKI. (PDF 39 kb)
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Westhoff, J.H., Seibert, F.S., Waldherr, S. et al. Urinary calprotectin, kidney injury molecule-1, and neutrophil gelatinase-associated lipocalin for the prediction of adverse outcome in pediatric acute kidney injury. Eur J Pediatr 176, 745–755 (2017). https://doi.org/10.1007/s00431-017-2907-y
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DOI: https://doi.org/10.1007/s00431-017-2907-y