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Platelet alloimmunization after multiple transfusions: a prospective study of 50 patients
1Laboratoire d'immunologie leuco-plaquettaire, Hôpital Henri Mondor, Créteil, France.
British Journal of Haematology
|July 1, 1992
Summary
Post-transfusion alloimmunization occurs in 26% of polytransfused patients, with HLA antibodies being most common. Some HLA and platelet-specific antibodies can negatively impact platelet transfusion effectiveness.
Area of Science:
- Immunology
- Transfusion Medicine
Background:
- Alloimmunization following blood transfusions is a significant clinical concern.
- Understanding the frequency and impact of specific antibodies is crucial for optimizing transfusion strategies.
Purpose of the Study:
- To determine the incidence of post-transfusion alloimmunization in polytransfused patients.
- To investigate the influence of detected antibodies on platelet transfusion response.
Main Methods:
- Prospective study of 50 polytransfused patients.
- Detection of platelet- and HLA-specific antibodies using lymphocytotoxicity techniques (LCT), platelet suspension indirect immunofluorescence test (PSIIFT), and monoclonal antibody immobilization of platelet antigens (MAIPA).
Main Results:
- HLA antibodies were detected in 26% of patients (13/50).
- Complement-independent HLA antibodies were associated with poor platelet recovery.
- Platelet-specific alloantibodies were identified in two patients, potentially affecting recovery.
- Platelet autoantibodies and paraformaldehyde-dependent antibodies were found but not linked to refractoriness.
Conclusions:
- Post-transfusion alloimmunization is prevalent in polytransfused individuals.
- Specific HLA and platelet antibodies can impair the efficacy of platelet transfusions.
- Advanced serological techniques are essential for comprehensive antibody detection.