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Related Experiment Videos

The interaction between human monocytes and red cells. Binding characteristics.

N Abramson, A F Lo Buglio, J H Jandl

    The Journal of Experimental Medicine
    |December 1, 1970
    PubMed
    Summary

    Human monocytes possess specific receptors for immunoglobulin G (IgG), enabling them to bind IgG-coated red blood cells and form rosettes. This interaction is crucial for red blood cell destruction.

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    Area of Science:

    • Immunology
    • Cell Biology
    • Hematology

    Background:

    • Immunoglobulin G (IgG) coated cells are recognized by mononuclear cells.
    • The precise mechanism of this interaction and the specific cell types involved require further elucidation.

    Purpose of the Study:

    • To investigate the interaction between IgG-coated red blood cells and human mononuclear cells.
    • To identify the specific cell surface receptors responsible for this binding.
    • To understand the role of this interaction in red blood cell destruction.

    Main Methods:

    • Rosette formation assays using IgG-coated red blood cells and human mononuclear cells.
    • Treatment with sulfhydryl-binding reagents and metabolic inhibitors.
    • Ultrastructural studies using electron microscopy.

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  • Cross-species comparison of white cell interactions.

    • Main Results:

    • Human mononuclear cells, primarily monocytes, formed rosettes with IgG-coated red blood cells.
    • Rosette formation was mediated by specific IgG receptors on monocytes.
    • Binding was blocked by sulfhydryl-binding reagents, indicating protein involvement.
    • Species specificity was observed in primate white cells.
    • Ultrastructural analysis revealed cell surface interdigitation and red blood cell deformation.

    Conclusions:

    • Human monocytes possess specific surface receptors for IgG.
    • These receptors facilitate the binding of IgG-coated red blood cells, leading to rosette formation.
    • This interaction likely plays a significant role in the clearance and destruction of red blood cells.