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Related Experiment Videos

D-glucose additive protects against osmotic-induced decrease in erythrocyte filterability.

K Lindmark1, K G Engström

  • 1Department of Surgical and Perioperative Sciences, Umeå University Hospital, Sweden. kristerlindmark@hotmail.com

Scandinavian Journal of Clinical and Laboratory Investigation
|December 29, 2000
PubMed
Summary

D-glucose, even when not osmotically active, protects red blood cells from decreased filterability caused by swelling. This occurs at concentrations relevant to intravenous infusions, preventing hemolysis.

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Area of Science:

  • Hematology
  • Cell Physiology
  • Biochemistry

Background:

  • Long-term glucose effects on red blood cells (erythrocytes) involve sorbitol accumulation and protein glycosylation.
  • Short-term, non-metabolic effects of glucose on erythrocyte function remain less understood.
  • D-glucose is typically osmotically inert in erythrocytes due to facilitated diffusion.

Purpose of the Study:

  • To investigate the immediate effects of glucose and its derivatives on erythrocyte volume, filterability, and hemolysis.
  • To determine if D-glucose exhibits osmotic activity and impacts erythrocyte function under conditions simulating intravenous infusion.
  • To elucidate the protective role of D-glucose against osmotic stress-induced changes in erythrocyte deformability.

Main Methods:

  • Erythrocyte volume regulation, hemolysis, and filterability were assessed using glucose derivatives in aqueous solutions.

Related Experiment Videos

  • Experiments involved controlled salt-stock dilution with water, D-glucose, 3-O-methyl-D-glucose (3-O-M-glucose), and L-glucose.
  • Erythrocyte filterability was measured using 3-micrometer and 5-micrometer pore filters at various glucose concentrations.

    • Main Results:

    • High concentrations (570 mmol/L) of D-glucose and 3-O-M-glucose caused significant erythrocyte swelling, while L-glucose induced a volume decrease.
    • Despite swelling, electrolyte-free D-glucose did not significantly alter erythrocyte filterability through 3-micrometer or 5-micrometer filters.
    • 3-O-M-glucose significantly decreased filterability through 3-micrometer filters, and L-glucose reduced filterability through 5-micrometer filters.
    • At concentrations > 114 mmol/L, D-glucose became osmotically active, preventing hemolysis during simulated intravenous infusion.

    Conclusions:

    • D-glucose, within a physiological concentration range, protects erythrocytes from decreased filterability associated with osmotic swelling.
    • This protective effect occurs without D-glucose exhibiting significant osmotic properties under normal physiological conditions.
    • The study highlights a crucial role of D-glucose in maintaining erythrocyte function and integrity during osmotic stress.