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Temperature-dependence of red cell aggregation.

F J Neumann, H Schmid-Schönbein, H Ohlenbusch

    Pflugers Archiv : European Journal of Physiology
    |May 1, 1987
    PubMed
    Summary
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    Lowering temperature increases red blood cell (RBC) aggregation, making them more resistant to dispersion. This occurs due to increased adsorptive energy and plasma viscosity, favoring RBC aggregate formation.

    Area of Science:

    • Biophysics
    • Hematology

    Background:

    • Red blood cell (RBC) aggregation is influenced by various physiological factors.
    • Understanding the temperature-dependence of RBC aggregation is crucial for hematological studies.

    Purpose of the Study:

    • To investigate how temperature affects red blood cell aggregation.
    • To analyze the kinetic parameters of RBC aggregation at different temperatures.

    Main Methods:

    • Photometric aggregometry was used to examine blood samples.
    • Samples were tested at temperatures ranging from 3°C to 37°C.

    Main Results:

    • Decreasing temperature enhanced RBC aggregate resistance to hydrodynamic dispersion.
    • Lower temperatures increased adsorptive energy and plasma viscosity, favoring RBC aggregation.

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  • The rate constant of aggregate formation, corrected for plasma viscosity, increased as temperature decreased.

    • Conclusions:

    • Red blood cell aggregation is favored by lower temperatures.
    • Increased adsorptive energy and plasma viscosity are key factors in temperature-dependent RBC aggregation.
    • The rate-limiting step in RBC aggregation may be the increasing contact area between cells.