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Related Experiment Videos

Surface markers of human eosinophils

S Gupta, G D Ross, R A Good

    Blood
    |November 1, 1976
    PubMed
    Summary

    Eosinophils possess receptors for complement and aggregated IgG, similar to lymphocytes. These cells differ from neutrophils, showing distinct complement receptor profiles crucial for immune responses.

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    Area of Science:

    • Immunology
    • Cell Biology
    • Hematology

    Background:

    • Eosinophils are key immune cells involved in host defense, particularly against parasites.
    • Understanding eosinophil surface receptors is crucial for elucidating their functional roles in health and disease.

    Purpose of the Study:

    • To investigate the surface characteristics of peripheral blood eosinophils.
    • To compare eosinophil receptors with those found on lymphocytes, monocytes, and neutrophils.

    Main Methods:

    • Analysis of surface immunoglobulins, Fc receptors (for IgG), and complement receptors on eosinophils.
    • Assessment of spontaneous rosette formation with sheep and mouse erythrocytes.
    • Functional assays for phagocytosis of complement-opsonized erythrocytes.

    Main Results:

    • Eosinophils exhibit receptors for complement and aggregated IgG.
    • They possess immune adherence (C4/C3b) and C3d complement receptors, similar to lymphocytes and monocytes.
    • Eosinophils differ from neutrophils by having C3d receptors and weaker immune adherence receptors; phagocytosis requires IgG.

    Conclusions:

    • Eosinophils have distinct complement receptor profiles compared to neutrophils.
    • These receptors play a role in eosinophil-mediated phagocytosis, particularly in the presence of IgG.
    • Eosinophils lack surface immunoglobulins and spontaneous erythrocyte rosette formation.

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