RT info:eu-repo/semantics/article T1 Biomarkers of Oxidative Stress in Healthy Infants within the First Three Days after Birth A1 Cavia Saiz, Mónica A1 Arnaez, Juan A1 Cilla, Amaia A1 Puente, Laura A1 García-Miralles, Laura C. A1 Muñiz Rodríguez, Pilar K1 Oxidative stress K1 Infant K1 Birth K1 Cord blood K1 Glutathione K1 Malondialdehyde K1 Carbonyl K1 Creatinine K1 Alimentos K1 Food K1 Biología molecular K1 Molecular biology K1 Bioquímica K1 Biochemistry AB The clinical relevance of stress biomarkers in newborns is well established. Currently,oxidative stress (OS) parameters are seen to play an important role in neonatal resuscitation guidelines,and a link has been observed between the amount of oxygen delivered and the level of OS and thedevelopment of various pathologies. The aim of the current study was to investigate changes inneonatal plasma and urine OS status during the first hours after birth. A lower antioxidant capacity(TAC) and higher levels of malondialdehyde in blood were observed in newborns at the time ofbirth compared with results 48 h postnatally. The urine revealed a significant and progressiveincrease in TAC and creatinine during the first 36 h of life, with a progressive decline thereafter.Meanwhile, malondialdehyde in urine samples showed no significant differences over time. Overall,the correlation between blood and urine parameters was poor, except for the relationship betweenumbilical vein glutathione reduced/oxidized ratio and urine malondialdehyde (r = 0.7; p = 0.004)and between TAC in the umbilical artery and urine (r = −0.547; p = 0.013). The biomarkers evaluatedin this study could be established as reference values for neonatal OS. PB MDPI YR 2023 FD 2023-06 LK http://hdl.handle.net/10259/8051 UL http://hdl.handle.net/10259/8051 LA eng NO This research was funded by Fundación Burgos por la Investigación de la Salud (grant number 1088) and Gerencia Regional de Castilla y Leon (grant number GRS 1773/A/18). DS Repositorio Institucional de la Universidad de Burgos RD 13-may-2024