Abstract

Renalase is an enzyme secreted by the kidneys, which takes part in the regulation of arterial pressure, myocardial contractility and modulation of vascular resistance, but its effect on renalase levels in newborns has not been studied yet. The levels of advanced oxidation protein products (AOPPs) were also evaluated as a marker of oxidative stress. This study examined whether renalase and AOPP levels are different in the cord blood of newborns exposed to gestational hypertension (HT). The association of both factors with perinatal and anthropometric data among the studied patients was assessed. The study included 89 newborns: 30 newborns from the study group, whose mothers were diagnosed with gestational HT, and 59 newborns born from normal pregnancies, who formed the control group. Anthropometric measurements and perinatal data in newborns in both groups were recorded. A significantly lower (p < 0.001) concentration of renalase was found in the study group (median (Q1-Q3): 23.96 μg/mL (20.63-26.91 μg/mL)) as compared to the control group (median (Q1-Q3): 37.54 μg/mL (33.78-40.02 μg/mL)). In case of AOPPs, a significantly higher (p < 0.001) concentration of AOPPs was observed in the study group (median (Q1-Q3): 131.65 μmol/L (113.80-146.10 μmol/L)) than in the controls (median (Q1-Q3): 93.70 μmol/L (87.10-111.20 μmol/L)). A significant difference between renalase and AOPP concentrations between the study and control groups has been demonstrated. Both factors may influence anthropometric and perinatal outcomes of newborns.

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