• Monika Kamianowska, Marek Szczepański, Elżbieta E Kulikowska, Barbara Bebko, Alicja Koput, and Anna Wasilewska.
• Department of Neonatology and Neonatal Intensive Care, Medical University of Bialystok, Bialystok, Poland.
• Arch Med Sci. 2021 Jan 1; 17 (1): 47-52.

IntroductionMonitoring of renal function in acute kidney injury in the pediatric population is complicated by the lack of age-related reference values of new biomarkers. Urinary netrin-1 is a new marker to demonstrate early kidney damage. Netrin-1 has a molecular mass of 72 kDa. It is therefore unlikely that it is filtered by the glomerulus under normal conditions. However, netrin-1 is highly induced after acute and chronic kidney injury and excreted in urine in humans. The aim of the study was to determine the normal concentrations of urinary netrin-1 in healthy full-term newborns.Material And MethodsThe study included 88 healthy full-term neonates (51 boys and 37 girls) born from normal, uncomplicated pregnancies. The concentration of netrin-1 was determined in urine obtained on the first or second day of life with a commercially available ELISA kit.ResultsThe urinary concentration of netrin-1 in newborns was independent of gender and time of urine collection. We found a negative correlation between both the urinary netrin-1 concentration and urinary netrin-1 concentration after normalization for urinary creatinine and the birth weight.ConclusionsThis is the first study showing the urinary netrin-1 concentration in healthy full-term newborns. Future investigation is needed to confirm its potential role as a marker of kidney function in this age group.Copyright: © 2021 Termedia & Banach.

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