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Osmotic parameters of red blood cells from umbilical cord blood

Mariia Zhurova1, Locksley E McGann2, Jason P Acker1

  • 1Department of Laboratory Medicine and Pathology, 8249-114 Street, Edmonton, AB T6G 2R8, Canada; Research and Development, Canadian Blood Services, 8249-114 Street, Edmonton, AB T6G 2R8, Canada.

Cryobiology
|April 15, 2014
PubMed

Insights

Umbilical cord red blood cells (cord RBCs) show distinct osmotic properties compared to adult RBCs. Understanding these parameters is crucial for developing effective cryopreservation methods for clinical applications.

Area of Science:

  • Biophysics
  • Hematology
  • Cell Biology

Background:

  • Transfusion of cord red blood cells (cord RBCs) is promising for treating fetal and neonatal anemia.
  • Developing a stable supply requires effective cryopreservation, necessitating knowledge of cord RBC osmotic parameters.

Purpose of the Study:

  • To characterize the osmotic parameters of cord RBCs, including osmotically inactive fraction (b), hydraulic conductivity (Lp), and glycerol permeability (Pglycerol).
  • To determine the Arrhenius activation energies (Ea) for Lp and Pglycerol in cord RBCs.

Main Methods:

  • Utilized a stopped-flow system to monitor osmotically-induced RBC volume changes via hemoglobin fluorescence.
  • Measured Lp and Pglycerol at 4°C, 20°C, and 35°C using Jacobs and Stewart equations.
  • Calculated Ea from Arrhenius plots.

Main Results:

  • Cord RBCs exhibit a larger osmotically inactive fraction than adult RBCs.
  • Lp and Pglycerol of cord RBCs differ from adult RBCs, varying with temperature and osmolality.
  • Cord RBCs showed a higher Ea for Lp and a lower Ea for Pglycerol compared to adult RBCs.

Conclusions:

  • Cord RBC osmotic parameters differ significantly from adult RBCs.
  • This data is essential for future development of cord RBC cryopreservation protocols.
  • Findings provide a foundation for improving transfusion therapies for neonatal anemia.

Keywords:
BiobankingCryopreservationCryoprotectantErythrocyteGlycerolModelingPermeabilityTransfusion medicine

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