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Genetic differences in hemoglobin influence on erythrocyte oxidative stress hemolysis

W C Kruckeberg1, D I Doorenbos, P O Brown

  • 1University of Mississippi Medical Center, Department of Preventative Medicine, Jackson 39216-4505.

Blood
|October 1, 1987
PubMed

Insights

Red blood cells (RBCs) from some mice strains hemolyze under oxidative stress, unlike others. This trait, linked to the hemoglobin beta chain, offers a model for studying RBC oxidative damage.

Area of Science:

  • Hematology
  • Oxidative Stress Research
  • Genetics

Background:

  • Red blood cells (RBCs) exhibit strain-dependent susceptibility to hemolysis under oxidative stress.
  • Human erythrocytes are resistant to hemolysis in this experimental system.
  • Oxidative stress can lead to lipid peroxidation, indicated by malonyldialdehyde formation.

Purpose of the Study:

  • To investigate the genetic basis and molecular mechanisms of oxidative stress-induced hemolysis in mouse RBCs.
  • To identify factors contributing to differential hemolysis susceptibility between mouse strains.
  • To establish a model for studying hemoglobin's role in prehemolytic events.

Main Methods:

  • Exposing RBCs from different inbred mouse strains to hydrogen peroxide (2.0 mmol/L).
  • Measuring malonyldialdehyde formation as an indicator of lipid peroxidation.
  • Assessing levels of glutathione and peroxidase activity.
  • Testing the protective effects of antioxidants (butylated hydroxyanisole, hydroxytoluene) and histidine.
  • Analyzing inheritance patterns using Mendelian analysis and correlating hemolysis with hemoglobin beta chain type in various mouse models (inbred, recombinant inbred, congenic).

Main Results:

  • Mouse RBCs from certain strains hemolyzed under oxidative stress, while others did not.
  • Hemolytic RBCs showed a fourfold higher rate of malonyldialdehyde formation compared to non-hemolytic cells.
  • Glutathione levels and peroxidase activity did not sufficiently explain the hemolysis differences.
  • Antioxidants and histidine protected hemolysis-prone RBCs.
  • The hemolysis trait followed autosomal recessive Mendelian inheritance.
  • Hemolysis susceptibility strongly correlated with the specific hemoglobin beta chain type.

Conclusions:

  • Hemoglobin beta chain type is a key determinant of oxidative stress-induced hemolysis in mouse RBCs.
  • This mouse model provides a valuable system for exploring hemoglobin's role in RBC oxidative damage and prehemolytic events.
  • Understanding these mechanisms could have implications for hemolytic anemias.

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