Oxidative Stress in Preterm Neonates: An Analysis of Oxidative Stress Biomarkers and Antioxidant Profiles

Abstract

Introduction: Oxidative stress is a complex event determined genetically and induced by an in- utero stressor. Oxidants are composed of reactive free radicals like Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS) which are manifested by several macromolecules of lipid, protein and DNA, causing deleterious effects in several organs. Antioxidant defense mechanism and its ability to be induced by hyperoxia is relatively impaired in preterm neonates. Aim: To study oxidative stress and antioxidants in preterm neonates. Materials and Methods: This study is an observational analytical study, which included preterm babies (25 males and 20 females) delivered vaginally from October 2012 to October 2013. Cord blood was collected in citrate bulbs immediately after vaginal delivery and stored at 4°C until processed. Malondialdehyde (MDA), Nitrates, Vitamin C and Vitamin E, levels were measured in cord blood. Statistical z-test was applied. Results: High levels of oxidative stress biomarkers like MDA and Nitrites along with decreased levels of antioxidants, Vitamin C and Vitamin E in preterm neonates was observed. MDA and Nitrates levels were significantly higher in males (p0.05) in both. Conclusion: This study results may conclude that preterm neonates have more oxidative stress especially in males affecting their life survival.

Keywords

• biomarkers
• cord blood
• malondialdehyde
• nitrates
• preterm newborns