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  • Title: Urine interleukin-18 and cystatin-C as biomarkers of acute kidney injury in critically ill neonates.
    Author: Li Y, Fu C, Zhou X, Xiao Z, Zhu X, Jin M, Li X, Feng X.
    Journal: Pediatr Nephrol; 2012 May; 27(5):851-60. PubMed ID: 22228436.
    Abstract:
    BACKGROUND: Urinary interleukin-18 and cystatin-C are suggested to be biomarkers for predicting acute kidney injury (AKI). The aims of this study are to examine whether the urinary concentrations of interleukin-18 and cystatin-C vary with gestational age and other factors in non-AKI control neonates, and to determine whether urinary interleukin-18 and cystatin-C can predict AKI development in non-septic critically ill neonates, independently of potential confounders. METHODS: We enrolled 62 non-septic critically ill neonates. Urine was collected every 48-72 h during the first 10 days of life. RESULTS: Urinary concentration of cystatin-C, but not interleukin-18, decreased with increasing gestational age and body weight, but not with increasing postnatal age in non-AKI control neonates. Both urinary interleukin-18 and cystatin-C were associated with AKI, even after controlling for gestational and postnatal age, birth weight, gender, Apgar score and the score for neonatal acute physiology in non-septic critically ill neonates. Urinary interleukin-18 and cystatin-C had odds ratios of 2.27 and 2.07, and achieved the area under-the-receiver-operating-characteristic curve of 0.72 and 0.92, respectively, for predicting AKI. CONCLUSIONS: The urinary concentration of cystatin-C, but not interleukin-18, may decrease with increasing renal maturity. Both urinary interleukin-18 and cystatin-C are independently predictive of AKI in non-septic critically ill neonates.
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