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[Structural and functional aspects of erythrocyte membrane in children, delivered with asphyxia]
Insights
Hypoxia in newborns increases lipid peroxidation (LPO) and alters red blood cell membrane structure. Antioxidant intervention is crucial immediately after birth to manage these effects.
Area of Science:
- Biochemistry
- Neonatal Physiology
- Cell Biology
Context:
- Investigates the impact of acute hypoxia during birth on fetal and neonatal physiological markers.
- Compares biochemical and biophysical parameters in infants experiencing birth asphyxia versus those from uncomplicated pregnancies.
Purpose:
- To assess lipid peroxidation (LPO) and antioxidative activity (AOA) of the ceruloplasmin/transferrin (CP/TF) system in newborns exposed to hypoxia.
- To examine alterations in red blood cell membrane lipid bilayer structure due to hypoxic conditions.
Summary:
- Hypoxic exposure duration correlates with LPO product accumulation in mild asphyxia.
- Severe asphyxia shows increased secondary LPO products despite lower primary product formation.
- Elevated AOA in the CP/TF system inadequately compensates for high LPO, indicating structural changes in the lipid bilayer.
Impact:
- Highlights the critical role of LPO and CP/TF system AOA in assessing hypoxic newborns.
- Underscores the necessity of prompt antioxidant therapy to mitigate hypoxic-induced damage in neonates.
- Provides evidence for altered red blood cell membrane biophysics following birth asphyxia.
Abstract:
Serum and red blood cell membrane lipid peroxidation (LPO), antioxidative activity (AOA) of the ceruloplasmin/transferrin (CP/TF) system, and biophysical parameters of the structure of a red blood cell membrane lipid bilayer were examined in fetuses experienced acute hypoxia at birth and in babies born to healthy mothers with uncomplicated pregnancy. The intensity of LPO product accumulation in mild asphyxia was ascertained to be proportional to the duration of hypoxic exposure of a fetus. In severe asphyxia accompanied by lower formation of primary LPO products, the levels of secondary LPO products showed a rise. A slight increase of AOA in the CP/TF system was unable to adequately compensate a high intensity of LPO processes, which provides strong evidence for altered structural parameters in the lipid bilayer. It was concluded that it was essential to correct hypoxic states in children with antioxidants immediately after birth.