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Related Experiment Videos

Risk factors for alloimmunization by patients with sickle cell disease.

M Murao1, M B Viana

  • 1Fundação Hemominas, Serviço de Hematologia, Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Medicas E Biologicas
|May 27, 2005
PubMed
Summary

Alloimmunization, the development of antibodies against transfused blood cells, affects 9.9% of sickle cell disease (SCD) patients. Older patients, particularly females with Hemoglobin SC (Hb SC) disease, face a higher risk.

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Area of Science:

  • Hematology
  • Immunology
  • Transfusion Medicine

Background:

  • Blood transfusions are crucial for managing sickle cell disease (SCD).
  • Alloimmunization, the formation of antibodies against transfused erythrocytes, complicates SCD patient care.
  • Identifying risk factors for alloimmunization is essential for improving transfusion strategies.

Purpose of the Study:

  • To determine the frequency and risk factors associated with alloimmunization in sickle cell disease patients.
  • To investigate the influence of age, sex, and hemoglobin type on alloantibody development.

Main Methods:

  • Retrospective review of transfusion records and medical charts of 828 SCD patients.
  • Analysis of alloimmunization frequency and detected alloantibodies, focusing on Rhesus and Kell systems.

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  • Multivariate analysis to identify independent risk factors for alloimmunization in 608 patients with recorded transfusion numbers.

    • Main Results:

    • Overall alloimmunization frequency was 9.9%, with 125 alloantibodies detected.
    • Female patients and older patients (median age 23.3 vs. 14.6 years) showed higher alloimmunization rates.
    • Independent risk factors included number of transfusions, older age, and Hemoglobin SC (Hb SC) disease.
    • Hb SC patients over 14 years had a 2.8-fold higher risk; female Hb SC patients faced the highest risk.

    Conclusions:

    • Alloimmunization is a significant concern in SCD patients receiving transfusions.
    • Older age, female sex, and Hb SC genotype are key risk factors for alloimmunization.
    • Transfusion management strategies should consider these factors to minimize alloantibody development in SCD patients.