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Updated: Jun 15, 2025
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Measuring Deformability and Red Cell Heterogeneity in Blood by Ektacytometry
Published on: January 12, 2018
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Red blood cells with reduced deformability are selectively cleared from circulation in a mouse model
Emel Islamzada1,2, Kerryn Matthews2,3, Erik S Lamoureux2,3
1Department of Pathology and Laboratory Medicine, The University of British Columbia, Vancouver, BC, Canada.
Blood Advances
|April 8, 2025
Summary
Donor red blood cells (RBCs) with altered deformability are rapidly cleared by the spleen. RBCs with deformability matching recipients persist, revealing selective splenic clearance mechanisms for transfusion efficacy.
Area of Science:
- Hematology
- Immunology
- Biophysics
Background:
- Donated red blood cells (RBCs) lose deformability during storage, impacting circulation.
- Spleen's mechanical sensing leads to clearance of less deformable RBCs, shortening transfusion effectiveness.
- The precise mechanism of selective RBC clearance by the spleen based on deformability is not fully understood.
Purpose of the Study:
- To investigate the selective clearance of donor RBCs based on their deformability profile compared to recipient RBCs.
- To determine if donor RBCs with deformability distinct from endogenous RBCs are preferentially removed by the spleen.
Main Methods:
- Murine donor RBCs were treated with aminotriazole to widen their deformability range.
- Labeled donor RBCs were infused into syngeneic recipients.
- A microfluidic device was used to measure RBC deformability pre- and post-transfusion and compare donor vs. recipient RBCs.
Main Results:
- Subpopulations of donor RBCs with deformability distinct from recipient RBCs were selectively cleared within 24 hours.
- Donor RBCs with deformability similar to endogenous RBCs persisted and followed normal clearance patterns.
- This demonstrates specific splenic recognition and removal of RBCs based on deformability differences.
Conclusions:
- The spleen selectively clears donor RBCs exhibiting deformability profiles that differ from the recipient's endogenous RBCs.
- This selective clearance mechanism impacts the circulation time and efficacy of transfused RBCs.
- Understanding RBC deformability is crucial for optimizing blood transfusion strategies and improving outcomes.
