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Related Experiment Videos

IgA immunocytes in tonsils.

G Mogi

    Acta Oto-Laryngologica
    |May 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Secretory component (SC) affinity tests reveal IgA immunocytes in tonsils. Pharyngeal tonsils show limited secretory IgA activity, suggesting a role in mucosal immunity.

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    Area of Science:

    • Immunology
    • Cell Biology
    • Otorhinolaryngology

    Background:

    • Tonsils play a role in mucosal immunity.
    • Secretory IgA (sIgA) is crucial for mucosal defense.
    • The function of pharyngeal tonsils in sIgA-mediated immunity requires further elucidation.

    Purpose of the Study:

    • To investigate dimeric IgA-forming cells using secretory component (SC) affinity tests in palatine and pharyngeal tonsils.
    • To examine the immunofluorescent localization of IgA immunocytes, IgA, and SC deposits.
    • To assess the contribution of pharyngeal tonsils to local immunological mucosal resistance.

    Main Methods:

    • Secretory component (SC) affinity test on palatine and pharyngeal tonsils from children.
    • Immunofluorescent localization of IgA immunocytes, IgA, and SC deposits.

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  • Quantitative analysis of SC-binding IgA immunocytes versus non-binding IgA immunocytes.

    • Main Results:

    • IgA immunocytes capable of binding SC were identified in both palatine and pharyngeal tonsils.
    • The number of SC-positive cells was significantly lower than IgA immunocytes not binding SC.
    • SC determinants were detected in some pharyngeal tonsil epithelial cells, with IgA immunocytes mainly in subepithelial and medullary areas.

    Conclusions:

    • Pharyngeal tonsils contain IgA immunocytes that can bind SC.
    • The presence of SC determinants in pharyngeal tonsil epithelium suggests a role in mucosal immunity.
    • Pharyngeal tonsils likely contribute to local mucosal resistance via secretory IgA, albeit with potentially limited activity.