Recent progress in understanding of allergic transfusion reaction

Area of Science:

• Transfusion Medicine
• Allergy Immunology

Background:

• Allergic transfusion reactions (ATRs) are frequent nonhemolytic transfusion complications.
• Diagnosis relies solely on clinical signs, leaving the causal link to transfusion often ambiguous.
• The exact mechanisms, including the role of immunoglobulin E (IgE), remain unclear despite existing theories.

Purpose of the Study:

• To investigate the underlying mechanisms of Allergic Transfusion Reactions (ATRs).
• To explore the utility of novel diagnostic tools in understanding ATR etiology.
• To clarify the role of allergic predispositions in transfusion reactions.

Main Methods:

• Introduction of the basophil activation test (BAT) in transfusion medicine.
• Application of passive immune BAT for enhanced diagnostic capabilities.
• Clinical observation and correlation with laboratory findings.

Main Results:

• The basophil activation test (BAT) provides novel insights into ATR mechanisms.
• Demonstration of IgE-mediated pathways in a subset of ATR cases.
• Correlation between allergic predispositions and observed transfusion reactions.

Conclusions:

• Basophil activation tests (BAT) are valuable tools for diagnosing ATRs.
• The etiology of ATRs is multifactorial, involving various allergic pathways.
• Further research using BAT can improve the understanding and management of transfusion reactions.