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Related Experiment Videos

A model implicating altered macrophage function in H-2 linked nonresponsiveness to hen lysozyme

A Miller

    Advances in Experimental Medicine and Biology
    |January 1, 1978
    PubMed
    Summary

    Mice immune responses to lysozymes involve T cells and suppression. A model suggests genetic factors in H-2b mice prevent antigen bridge disruption, leading to immune tolerance.

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    Area of Science:

    • Immunology
    • Molecular Biology
    • Genetics

    Background:

    • Differential immune responsiveness in H-2b mice to gallinaceous lysozymes indicates T cell involvement.
    • Previous studies suggest macrophages play a directive role via limited antigen presentation.

    Purpose of the Study:

    • To investigate the mechanisms underlying differential immune responses to lysozymes in mice.
    • To propose a model explaining the genetic control of T cell suppression and antigen presentation.

    Main Methods:

    • Summarizing results from other laboratories.
    • Developing a theoretical model based on existing data.

    Main Results:

    • Suppressor T cells recognizing specific lysozyme determinants are present in all mouse strains.
    • Antigen bridging between suppressor and T cell determinants is crucial for suppression.
    • This antigen bridge is disrupted in most strains, except H-2b mice.
    • Failure to disrupt the bridge in H-2b mice is linked to Ia-controlled macrophage processing defects.

    Conclusions:

    • A genetically controlled macrophage processing defect in H-2b mice leads to a failure in disrupting the antigen bridge.
    • This mechanism explains the observed differential immune responsiveness and tolerance to specific lysozymes in H-2b mice.

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