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Related Experiment Videos

The IgA response: inductive aspects, regulatory cells, and effector functions.

S M Michalek, J R McGhee, H Kiyono

    Annals of the New York Academy of Sciences
    |June 30, 1983
    PubMed
    Summary

    This review highlights how lipopolysaccharide (LPS) induces oral tolerance by regulating the IgA immune response. Studies focused on gut-associated lymphoid tissue (GALT) cells and T-helper cells involved in IgA production.

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    Area of Science:

    • Immunology
    • Gastroenterology
    • Microbiology

    Background:

    • Oral tolerance is crucial for preventing immune reactions to food antigens.
    • The IgA immune response and gut-associated lymphoid tissue (GALT) play key roles in maintaining gut homeostasis.
    • Understanding the inductive mechanisms of oral tolerance is essential for managing immune-related disorders.

    Purpose of the Study:

    • To review current research on the inductive aspects of the IgA immune response.
    • To investigate the homeostatic mechanisms involved in oral tolerance induction.
    • To elucidate the role of lipopolysaccharide (LPS) in systemic unresponsiveness to oral antigens.

    Main Methods:

    • Utilizing unique inbred mouse strains in controlled microbial environments.

    Related Experiment Videos

  • Characterizing lymphoreticular cell types within GALT, including accessory cells, regulatory T-cells, and precursor IgA B-cells.
  • Analyzing antigen-specific T-helper (Th)-cell clones from murine Peyer's patches (PP) that support IgA responses.

    • Main Results:

    • Evidence suggests LPS plays a central role in systemic unresponsiveness to orally encountered antigens.
    • Characterization of GALT cell types provides insights into immune regulation.
    • Identification of Th-cell clones that preferentially support IgA isotype responses.

    Conclusions:

    • LPS is a key factor in the induction of oral tolerance.
    • Further research on GALT cell types and antigen-specific Th-cells is needed to fully understand IgA-mediated oral tolerance.
    • This review emphasizes critical areas for future investigation in immune tolerance.