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Comparative study of antioxidant enzymes and lipid peroxidation in cord and maternal red blood cells
Insights
Cord blood shows higher antioxidant enzyme activity and lipid peroxidation than maternal blood, differing from prior research. This may relate to oxygen radical concepts and early ductus arteriosus closure in newborns.
Area of Science:
- Biochemistry
- Neonatal Physiology
- Oxidative Stress
Background:
- Neonatal red blood cells (RBCs) face unique oxidative challenges during transition to extrauterine life.
- Understanding antioxidant defenses in newborns is crucial for assessing neonatal health.
- Lipid peroxidation is a marker of oxidative damage.
Purpose of the Study:
- To compare antioxidant enzyme activities and lipid peroxidation levels in neonatal cord blood versus maternal blood.
- To investigate potential differences in oxidative stress markers between mothers and their healthy term neonates.
Main Methods:
- Collected blood samples from 50 mothers and 50 umbilical cords of healthy, full-term neonates.
- Assayed activities of key antioxidant enzymes in RBCs.
- Measured levels of lipid peroxidation in RBCs.
Main Results:
- Antioxidant enzyme activities (excluding catalase) were significantly higher in cord blood compared to maternal blood.
- Lipid peroxidation levels were also elevated in cord blood.
- Findings contrast with some previous literature.
Conclusions:
- Neonatal RBCs exhibit distinct antioxidant profiles and higher oxidative stress markers at birth.
- These differences may be linked to oxygen radical-related mechanisms, potentially influencing neonatal physiological events like ductus arteriosus closure.
Abstract:
The activities of the antioxidant enzymes and lipid peroxidation were compared in the red blood cells from the blood of 50 mothers and the umbilical cord of 50 full-term healthy neonates. The antioxidant activities (except that of catalase) and the lipid peroxidation were found to be higher in the cord blood. These observations differed from the previous literature data: a parallel could be found only with the concept (connected with oxygen radicals) of the early closure of the ductus arteriosus.