Biophysical and Biochemical Markers of Red Blood Cell Fragility

Ariel Orbach, Orly Zelig, Saul Yedgar, Gregory Barshtein

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Background: Red blood cells (RBCs) undergo a natural aging process occurring in the blood circulation throughout the RBC lifespan or during routine cold storage in the blood bank. The aging of RBCs is associated with the elevation of mechanical fragility (MF) or osmotic fragility (OF) of RBCs, which can lead to cell lysis. The present study was undertaken to identify RBC properties that characterize their susceptibility to destruction under osmotic/mechanical stress. Methods: RBCs were isolated from freshly donated blood or units of packed RBCs (PRBCs) and suspended in albumin-supplemented phosphate-buffered saline (PBS). In addition, PRBCs were separated by filtration through a microsphere column into two fractions: enriched with rigid (R-fraction) and deformable (D-fraction) cells. The RBCs were subjected to determination of deformability, MF and OF, moreover, the level of cell surface phosphatidylserine (PS) and the stomatin level in isolated RBC membranes were measured. Results: In the RBC population, the cells that were susceptible to mechanical and osmotic stress were characterized by low deformability and increased level of surface PS. The OF/MF was higher in the R-fraction than in the D-fraction. Stomatin was depleted in destroyed cells and in the R-fraction. Conclusion: RBC deformability, the levels of surface PS, and membrane stomatin can be used as markers of RBC fragility.

Original languageAmerican English
Pages (from-to)183-187
Number of pages5
JournalTransfusion Medicine and Hemotherapy
Issue number3
StatePublished - 1 Jun 2017

Bibliographical note

Publisher Copyright:
© 2017 S. Karger GmbH, Freiburg.


  • Erythrocytes
  • Hemolysis
  • Membrane defects
  • RBC aging
  • RBC lesion
  • RBC storage


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