Microparticles in stored red blood cells as potential mediators of transfusion complications

Area of Science:

• Transfusion Medicine
• Hematology
• Immunology

Background:

• Cell-derived microparticles (MPs) are circulating fragments released from various cell types.
• MPs are implicated in various physiological and pathological processes, including thrombosis and inflammation.
• The role of MPs in blood transfusion complications remains an area of active investigation.

Purpose of the Study:

• To review the evidence linking cell-derived microparticles (MPs) to transfusion-related adverse events.
• To examine the hypothesis that storage duration of blood products influences the risk of adverse events via MPs.
• To focus on red blood cell-derived MPs (RMPs) and their potential contribution to specific complications.

Main Methods:

• Literature review of existing studies on microparticles and transfusion reactions.
• Analysis of evidence supporting the involvement of MPs in transfusion-related acute lung injury (TRALI) and postoperative thrombosis.
• Discussion of ongoing research aimed at directly testing the MP hypothesis.

Main Results:

• Circulating MPs, particularly red blood cell-derived MPs (RMPs), are reviewed for their potential role in adverse transfusion events.
• Evidence suggests a correlation between MPs and transfusion-related acute lung injury (TRALI) and postoperative thrombosis.
• The hypothesis that older stored blood may pose an increased risk due to MPs is consistent with current data, though evidence is largely circumstantial.

Conclusions:

• Cell-derived microparticles, especially RMPs, are potentially involved in transfusion-related adverse events.
• Further direct research is required to confirm the causal role of MPs in complications like TRALI and thrombosis.
• Understanding the MP contribution could inform strategies for safer blood transfusion practices.