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Erschienen in: Pediatric Nephrology 4/2015

01.04.2015 | Original Article

Cystatin C in acute kidney injury diagnosis: early biomarker or alternative to serum creatinine?

verfasst von: Paola Lagos-Arevalo, Ana Palijan, Laura Vertullo, Prasad Devarajan, Michael R. Bennett, Venkata Sabbisetti, Joseph V. Bonventre, Qing Ma, Ronald D. Gottesman, Michael Zappitelli

Erschienen in: Pediatric Nephrology | Ausgabe 4/2015

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Abstract

Background

Early acute kidney injury (AKI) diagnosis is needed to pursue treatment trials. We evaluated cystatin C (CysC) as an early biomarker of serum creatinine (SCr)-AKI and an alternative to define AKI.

Methods

We studied 160 non-cardiac children in the intensive care unit (ICU). We measured daily CysC and SCr. AKI was staged by KDIGO (Kidney Disease: Improving Global Outcomes) guidelines using SCr and CysC (CysC-AKI). We calculated area under the curve (AUC) for (1) neutrophil gelatinase-associated lipocalin (NGAL), interleukin-18 (IL-18), kidney injury molecule-1 (KIM-1) and urine CysC to diagnose SCr- and CysC-AKI; and (2) for CysC to diagnose SCr-AKI. We evaluated AKI associations with length of stay and ventilation duration.

Results

We found that 44 % of patients developed SCr-AKI; 32 % developed CysC-AKI. Early ICU NGAL was most diagnostic of CysC-AKI (AUC 0.69, 95% CI 0.54–0.84); IL-18 was most diagnostic for SCr-AKI (AUC 0.69 95% CI 0.55–0.82). Combining SCr and CysC-AKI definition led to higher biomarker diagnostic AUC’s. CysC-AKI was not more strongly associated with clinical outcomes. Early ICU CysC predicted SCr-AKI development (AUC 0.70, 95 % CI 0.53–0.89).

Conclusions

Our findings do not support replacing SCr by CysC to define AKI. Early ICU CysC predicts SCr-AKI development and combined SCr-CysC-AKI definition leads to stronger AKI biomarker associations.
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Metadaten
Titel
Cystatin C in acute kidney injury diagnosis: early biomarker or alternative to serum creatinine?
verfasst von
Paola Lagos-Arevalo
Ana Palijan
Laura Vertullo
Prasad Devarajan
Michael R. Bennett
Venkata Sabbisetti
Joseph V. Bonventre
Qing Ma
Ronald D. Gottesman
Michael Zappitelli
Publikationsdatum
01.04.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Pediatric Nephrology / Ausgabe 4/2015
Print ISSN: 0931-041X
Elektronische ISSN: 1432-198X
DOI
https://doi.org/10.1007/s00467-014-2987-0

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