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Human granulocyte function during dextran infusion.

C Jarstrand, G Lahnborg, L Berghem

    Acta Chirurgica Scandinavica. Supplementum
    |January 1, 1979
    PubMed
    Summary
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    Dextran infusion slightly increased granulocyte metabolic activity, measured by nitroblue tetrazolium (NBT) reduction. In vitro studies confirmed dextran

    Area of Science:

    • Immunology
    • Hematology

    Background:

    • Granulocytes are crucial immune cells.
    • Dextran is a polysaccharide used medically.
    • Its effect on granulocyte function is not fully understood.

    Purpose of the Study:

    • To investigate the impact of dextran infusion on human granulocyte function.
    • To determine if dextran affects granulocyte metabolic activity and bactericidal capacity.

    Main Methods:

    • Healthy individuals received dextran infusion.
    • Nitroblue tetrazolium (NBT) reduction assay measured granulocyte metabolic activity.
    • Bactericidal capacity, chemotaxis, and random migration were also assessed.
    • In vitro experiments tested direct effects of dextran on granulocytes.

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    Main Results:

    • Dextran infusion significantly increased NBT reduction in granulocytes.
    • In vitro dextran addition dose-dependently enhanced NBT reduction.
    • No significant changes were observed in bactericidal capacity, chemotaxis, or random migration.
    • Surface interaction and phagocytosis of dextran are proposed mechanisms.

    Conclusions:

    • Dextran enhances granulocyte metabolic activity.
    • Dextran does not impair key granulocyte functions like killing bacteria or migration.
    • Further research into dextran-mediated immune modulation is warranted.