Pathobiology of transfusion reactions

Area of Science:

• Transfusion Medicine
• Immunohematology
• Hemolysis Research

Background:

• Antibody-induced hemolytic transfusion reactions have been known for over 300 years.
• Early transfusion medicine focused on immunohematology to prevent these reactions.
• Despite efforts, incompatible transfusions still occur due to errors or alloimmunization.

Purpose of the Study:

• To trace the historical generation of knowledge on hemolytic transfusion reactions.
• To describe recent advances in understanding these reactions.
• To review mechanisms of hemolysis, its products' metabolism, and effects on recipients.

Main Methods:

• Review of clinical cases.
• Analysis of animal models.
• Inference from related human pathologies.
• Studies using small volumes of transfused red blood cells.

Main Results:

• Substantial new knowledge has been accumulated over recent decades.
• Understanding of hemolysis mechanisms has advanced.
• Metabolism of hemolysis products and their biological effects are better understood.

Conclusions:

• Hemolytic transfusion reactions remain a critical concern in transfusion medicine.
• Ongoing research continues to elucidate complex mechanisms and recipient impacts.
• Historical and recent data provide a comprehensive view of transfusion reaction knowledge.