Viability and function of stored sickle erythrocytes

Area of Science:

• Hematology
• Transfusion Medicine
• Red Blood Cell Metabolism

Background:

• Sickle cell anemia (SCA) affects red blood cells (erythrocytes), impacting their function and survival.
• Understanding the effects of storage on SCA erythrocytes is crucial for transfusion strategies.

Purpose of the Study:

• To compare the functional and metabolic characteristics of fresh and stored erythrocytes from SCA patients.
• To assess the impact of storage duration on erythrocyte parameters and post-transfusion viability.

Main Methods:

• Erythrocytes from SCA patients and healthy controls were stored for three weeks in CPD (citrate-phosphate-dextrose).
• Levels of ATP (adenosine triphosphate), 2,3-DPG (2,3-diphosphoglycerate), and P50 (partial pressure of oxygen at 50% saturation) were measured.
• Post-transfusion recovery and survival were evaluated in autologous recipients and an animal model.

Main Results:

• Storage-induced changes in ATP, 2,3-DPG, and P50 were comparable between SCA and control erythrocytes.
• SCA erythrocytes retained significantly higher 2,3-DPG levels post-storage compared to controls.
• Stored SCA erythrocytes demonstrated comparable or improved post-transfusion recovery and survival rates.

Conclusions:

• SCA erythrocytes tolerate storage lesions effectively, likely due to their younger mean cell age.
• The findings support the potential for using stored autologous erythrocytes for selected SCA patients.
• Autotransfusion should be considered as a therapeutic option in specific clinical scenarios for sickle cell disease management.