alexa Oxidative stress in the neonate.
Pediatrics

Pediatrics

Journal of Neonatal Biology

Author(s): Robles R, Palomino N, Robles A

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Abstract The aim of this study is to determine the oxidative state of term and preterm neonates at the moment of birth and during the first days of life, and the influence of exposure to oxygen on the premature neonates.A total of 20 neonates were selected. Group A: 10 healthy full-term neonates, and Group B: 10 preterm neonates with no other pathology associated, requiring oxygen therapy. Venous samples were taken in cord at 3 and 72 h in Group A, and in cord at 3, 24 and 72 h and 7 days in Group B.Hydroperoxides, Q10 coenzyme (Co Q10) and alpha-tocopherol were measured within the erythrocyte membrane. Levels of hydroperoxides present in erythrocyte membrane were higher than normal both in Group A and in Group B at birth. This increase was greater in the group of premature neonates. Levels of alpha-tocopherol at birth increase significantly at 72 h in term neonates. Among the premature newborns, alpha-tocopherol levels are two to three times lower at birth and do not rise to higher levels as in the term neonate group. Fall in levels of Co Q10 in erythrocyte membranes is observed, and perhaps is due to the role of Co Q10 in maintaining the pool of reduced tocopherol. At birth, the neonate presents an increase of markers of oxidative stress and a decrease of their antioxidant defenses. This difference is greater as gestational age decreases. The application of oxygen therapy resulted in these levels which remain low throughout the study period.
This article was published in Early Hum Dev and referenced in Journal of Neonatal Biology

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