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Delayed hypersensitivity in mast-cell-deficient mice.

W R Thomas, J W Schrader

    Journal of Immunology (Baltimore, Md. : 1950)
    |June 1, 1983
    PubMed
    Summary
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    Mast cell-deficient mice effectively produced delayed hypersensitivity responses, demonstrating T-cell mediated immunity is independent of mast cells for this immune function.

    Area of Science:

    • Immunology
    • Cellular Biology

    Background:

    • Mast cells play a role in allergic reactions and immune responses.
    • Their specific role in delayed-type hypersensitivity (DTH) is not fully understood.

    Purpose of the Study:

    • To investigate the role of mast cells in the development of delayed hypersensitivity responses.
    • To determine if mast cell deficiency affects T-cell mediated immunity.

    Main Methods:

    • Utilized mast cell-deficient Wf/Wf and W/Wv mice.
    • Assessed delayed hypersensitivity responses to contact sensitizers (oxazolone, picryl chloride).
    • Evaluated IgE-mediated passive cutaneous anaphylaxis.
    • Transferred DTH using antigen-specific T cell lines.

    Main Results:

    Related Experiment Videos

    • Mast cell-deficient mice (W/Wv) lacked detectable mast cells and could not produce passive cutaneous anaphylaxis.
    • Both mast cell-deficient genotypes produced robust delayed hypersensitivity responses.
    • These responses were comparable to control mice across various antigen doses.
    • T-cell mediated transfer of DTH was successful in Wf/Wf mice.
    • Lymph node proliferation post-sensitization was normal in deficient mice.

    Conclusions:

    • Delayed hypersensitivity is independent of mast cells.
    • T-cell mediated immunity functions normally in the absence of mast cells for DTH responses.
    • Mast cells are not essential for initiating or executing delayed hypersensitivity.