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Novel concepts in red blood cell clearance
Silvia Neri1, Dorine W Swinkels2, Hanke L Matlung1
1Department of Molecular Hematology, Sanquin Research and Landsteiner Laboratory, University of Amsterdam, Amsterdam.
Current Opinion in Hematology
|September 8, 2021
Summary
Red blood cell (RBC) clearance mechanisms vary by context. Recent findings highlight spleen retention, immune signals, neutrophil roles, and inflammation
Area of Science:
- Hematology
- Immunology
- Cellular Biology
Background:
- Red blood cell (RBC) clearance is crucial for maintaining homeostasis and has been extensively studied across various pathologies.
- Understanding RBC degradation pathways is essential for diagnosing and treating conditions involving RBC destruction.
Purpose of the Study:
- To review the latest mechanistic insights into RBC clearance.
- To explore RBC clearance in homeostatic removal, immune-mediated destruction, and systemic inflammation.
Main Methods:
- This is a review article, synthesizing recent findings from various studies.
- Mechanistic insights are discussed based on published research.
Main Results:
- Normal RBC degradation involves increased RBC adhesion and splenic retention, leading to hemolysis.
- Immune-mediated RBC clearance is modulated by antigen density, 'eat me'/'don't eat me' signals, and neutrophil involvement.
- Systemic inflammation drives RBC clearance via macrophage activity and direct inflammatory damage.
Conclusions:
- RBC clearance is a complex process with context-dependent mechanisms.
- Recent advances reveal novel roles for RBC adhesion, immune signaling, neutrophils, and inflammation in RBC destruction.
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