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Related Experiment Videos

Does the D-galactose receptor on Kupffer cells recycle?

H Kolb, D Vogt, V Kolb-Bachofen

    The Biochemical Journal
    |November 15, 1981
    PubMed
    Summary

    Kupffer cells possess a D-galactose/D-glucose specific lectin receptor on their surface. New lectin activity appears rapidly after digestion, indicating internal lectin molecule transfer, not new protein synthesis.

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    Area of Science:

    • Immunology
    • Cell Biology
    • Glycobiology

    Background:

    • Kupffer cells are key immune cells in the liver.
    • These cells express surface receptors involved in cellular interactions.
    • Lectin receptors play a role in recognizing specific carbohydrate structures.

    Purpose of the Study:

    • To investigate the origin and dynamics of lectin-like receptors on Kupffer cells.
    • To determine the mechanism behind the rapid reappearance of lectin activity after receptor removal.

    Main Methods:

    • Tryptic digestion of Kupffer cell surface receptors.
    • Assessment of lectin activity on the plasma membrane post-digestion.
    • Analysis to rule out de novo protein biosynthesis.

    Main Results:

    • Kupffer cells express a lectin-like receptor specific for D-galactose/D-glucose residues.
    • Tryptic digestion led to the appearance of new lectin activity within 15 minutes.
    • This rapid reappearance was not dependent on new protein synthesis.

    Conclusions:

    • The study indicates a rapid transfer of pre-existing lectin molecules from intracellular stores to the Kupffer cell surface.
    • Kupffer cells can enter a state where this receptor recycling mechanism is inactive.

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