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[Lipid peroxidation and the antioxidant system in newborn infants]
Insights
Neonatal boys and girls show similar oxidative stress markers initially. However, newborn girls exhibit enhanced red blood cell antioxidant enzymes and increased blood plasma antioxidant activity shortly after birth.
Area of Science:
- Biochemistry
- Neonatal Physiology
- Oxidative Stress Research
Background:
- Neonatal period is a critical transition with significant physiological adaptations.
- Oxidative stress markers are crucial for assessing neonatal health and development.
- Understanding sex-based differences in early life is important for targeted interventions.
Purpose of the Study:
- To compare key oxidative stress parameters between male and female neonates.
- To investigate early postnatal changes in antioxidant activity and peroxide resistance.
- To identify potential sex-specific physiological responses in newborns.
Main Methods:
- Measurement of malonic dialdehyde levels in blood plasma and red blood cells.
- Assay of total antioxidant activity in blood plasma and red blood cells.
- Evaluation of red blood cell peroxide resistance.
- Comparative analysis between male and female neonates within the first 6 days of life.
Main Results:
- Most measured parameters showed no significant differences between male and female neonates in the first 6 days.
- A notable activation of red blood cell catalase and peroxidase was observed in female neonates.
- Total antioxidant activity in the blood plasma of female neonates increased from the early days post-birth.
Conclusions:
- While overall oxidative stress markers are similar, female neonates display early, sex-specific enhancements in antioxidant defense mechanisms.
- These findings suggest a potentially more robust antioxidant system in female infants from birth.
- Further research is warranted to explore the long-term implications of these early-life differences.
Abstract:
During measurements of the content of malonic dialdehyde and the total antioxidant activity in blood plasma and red blood cells as well as of their peroxide resistance in healthy neonates, it has been established that in boys and girls the majority of the study parameters did not differ within the first 6 days of life. At the same time in girls, catalase and peroxidase of red blood cells were activated and the total antioxidant activity of blood plasma was increased since the first days after the birth.