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Mean corpuscular hemoglobin concentration and cell deformability.

M R Clark1

  • 1Department of Laboratory Medicine, University of California, San Francisco 94143.

Annals of the New York Academy of Sciences
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

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Sickle cell disease involves dehydrated red blood cells that lose their ability to deform. Cellular dehydration

Area of Science:

  • Hematology
  • Biophysics
  • Cell Biology

Background:

  • Sickle cells exhibit a subpopulation of severely dehydrated cells.
  • Cellular dehydration impacts sickle cell deformability and hemoglobin S polymerization.
  • Deformability defects depend on measurement methods, sensitive to intracellular hemoglobin concentration or cell size.

Purpose of the Study:

  • To investigate the rheologic effects of cellular dehydration in sickle cell disease.
  • To understand the relationship between dehydration, deformability, and hemoglobin S polymerization.
  • To assess the clinical relevance of dehydrated cells in sickle cell disease.

Main Methods:

  • In vitro measurement of red blood cell deformability.
  • Analysis of cellular dehydration effects under varying conditions.

Related Experiment Videos

  • Comparison of different deformability measurement techniques (e.g., extent/rate vs. filtration).

    • Main Results:

    • Dehydration adversely affects the deformability of oxygenated sickle cells.
    • Deformability measurement sensitivity varies with method (intracellular Hb concentration vs. cell size).
    • Red blood cells tolerate dehydration and increased viscosity better than loss of surface area or increased volume.

    Conclusions:

    • The direct rheologic impact of cellular dehydration in sickle cell disease may be less significant than previously thought.
    • Mean Corpuscular Hemoglobin Concentration (MCHC) likely plays a more critical role in hemoglobin S polymerization kinetics.
    • Clinical manifestations of sickle cell disease may not directly correlate with the proportion of dehydrated cells.