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Decreased reduced glutathione and glutathione reductase activity in subjects with hemoglobin C

S Saad1, S I Salles, P E Velho

  • 1Department of Clinical Medicine, State University of Campinas, UNICAMP-Brazil.

Nouvelle Revue Francaise D'Hematologie
|January 1, 1991
PubMed

Insights

Red blood cell antioxidant enzymes like catalase and glutathione peroxidase are reduced in sickle cell anemia. Hemoglobin C disorders show lower reduced glutathione and glutathione reductase, potentially increasing red blood cell breakdown.

Area of Science:

  • Hematology
  • Biochemistry
  • Red Blood Cell Metabolism

Background:

  • Hemoglobin C (Hb C) disorders and sickle cell anemia (SCA) involve red blood cell abnormalities.
  • Oxidative stress plays a role in the pathophysiology of hemoglobinopathies.

Purpose of the Study:

  • To investigate erythrocyte antioxidant enzyme activities and glutathione levels in individuals with Hb C, Hb S, and combined Hb C/S conditions.
  • To explore the relationship between these biochemical markers and red blood cell characteristics.

Main Methods:

  • Quantification of erythrocyte catalase, reduced glutathione, glutathione peroxidase, and glutathione reductase.
  • Comparison of enzyme activities and glutathione levels across control groups, Hb AC, Hb SC, Hb CC, and SCA patients.

Main Results:

  • Decreased catalase and glutathione peroxidase activities were observed in sickle cell anemia.
  • Significantly lower reduced glutathione and glutathione reductase activity were found in subjects with Hb C (Hb AC, Hb CC, Hb SC).
  • Differences in red cell dehydration, potassium efflux, and Hb C binding to membrane proteins were noted.

Conclusions:

  • Reduced glutathione and glutathione reductase may contribute to oxidative stress and hemolysis in Hb C disease.
  • These biochemical alterations may be linked to specific red blood cell changes observed in Hb C and SCA.

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