Article ; Online: High-throughput quantification of red blood cell deformability and oxygen saturation to probe mechanisms of sickle cell disease.
Proceedings of the National Academy of Sciences of the United States of America
2023 Volume 120, Issue 48, Page(s) e2313755120
Abstract: The complex, systemic pathology of sickle cell disease is driven by multiple mechanisms including red blood cells (RBCs) stiffened by polymerized fibers of deoxygenated sickle hemoglobin. A critical step toward understanding the pathologic role of ... ...
Abstract | The complex, systemic pathology of sickle cell disease is driven by multiple mechanisms including red blood cells (RBCs) stiffened by polymerized fibers of deoxygenated sickle hemoglobin. A critical step toward understanding the pathologic role of polymer-containing RBCs is quantifying the biophysical changes in these cells in physiologically relevant oxygen environments. We have developed a microfluidic platform capable of simultaneously measuring single RBC deformability and oxygen saturation under controlled oxygen and shear stress. We found that RBCs with detectable amounts of polymer have decreased oxygen affinity and decreased deformability. Surprisingly, the deformability of the polymer-containing cells is oxygen-independent, while the fraction of these cells increases as oxygen decreases. We also find that some fraction of these cells is present at most physiologic oxygen tensions, suggesting a role for these cells in the systemic pathologies. Additionally, the ability to measure these pathological cells should provide clearer targets for evaluating therapies. |
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MeSH term(s) | Humans ; Oxygen Saturation ; Anemia, Sickle Cell ; Erythrocytes ; Erythrocyte Deformability ; Polymers ; Oxygen |
Chemical Substances | Polymers ; Oxygen (S88TT14065) |
Language | English |
Publishing date | 2023-11-20 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 209104-5 |
ISSN | 1091-6490 ; 0027-8424 |
ISSN (online) | 1091-6490 |
ISSN | 0027-8424 |
DOI | 10.1073/pnas.2313755120 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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