Red Cell Alloimmunization In Multitransfused Thalassaemia Major Patients

Area of Science:

• Hematology
• Immunology
• Transfusion Medicine

Background:

• Lifelong transfusions are essential for thalassaemia patients but can lead to complications like alloimmunization.
• Alloimmunization occurs when foreign red blood cell antigens trigger antibody formation in patients.
• This study addresses the significant challenge of alloantibody development in transfusion-dependent thalassaemia populations.

Purpose of the Study:

• To investigate the frequency of red cell alloantibodies in thalassaemia patients.
• To identify and characterize the specific types of alloantibodies developed by these patients.
• To provide data for improved transfusion strategies in thalassaemia management.

Main Methods:

• Patients undergoing multiple transfusions, excluding those with positive direct antiglobulin tests (DAT), were enrolled.
• Antibody screening was performed, followed by antibody identification using three- and eleven-cell panels for positive results.
• Testing included room temperature, low ionic strength saline (LISS), and Coombs phases.

Main Results:

• Out of 302 thalassaemia patients, 4.0% (12 patients) showed positive alloimmunization.
• Anti-Cw antibodies were the most prevalent, found in 1.3% of patients, followed by Anti-K, -k, -S, and -Lua (0.7% each).
• Males constituted 66.67% of alloimmunized patients, and females 33.33%.

Conclusions:

• Regular blood transfusions in thalassaemia major patients can lead to the development of red cell alloantibodies.
• Implementing detailed pretransfusion screening protocols is vital for better patient management.
• Understanding alloantibody profiles can help prevent transfusion reactions and optimize blood product selection.