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Related Experiment Videos

Shared antigenic determinants between brain and thymus-derived lymphocytes in dogs.

S Krakowka, A L Wallace, A Koestner

    Acta Neuropathologica
    |January 1, 1981
    PubMed
    Summary

    Canine distemper may trigger autoimmune responses targeting canine Thy-1, a shared antigen on myelin and lymphocytes. This suggests a potential link between viral infections and autoimmune diseases like multiple sclerosis.

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    Area of Science:

    • Immunology
    • Neuroscience
    • Veterinary Medicine

    Background:

    • Antilymphocyte antibodies have been implicated in autoimmune diseases.
    • Canine distemper is a viral disease affecting the nervous and lymphatic systems.

    Purpose of the Study:

    • To investigate the presence and specificity of antilymphocyte antibodies in canine distemper convalescent sera.
    • To explore a potential common antigen shared by canine myelin and lymphocytes.

    Main Methods:

    • Complement-dependent microcytotoxicity assay was used to test sera.
    • Absorption studies with canine white matter and galactocerebroside were performed.
    • Cytotoxicity was assessed against lymphoma cells, thymocytes, and lymphocytes.

    Main Results:

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    • Sera from canine distemper convalescent dogs showed cytotoxicity against various canine lymphoid cells.
    • The cytotoxic effect was absorbed by canine white matter, indicating a shared antigen.
    • Absorption with galactocerebroside did not remove cytotoxicity, ruling out this specific myelin component.

    Conclusions:

    • A common antigen, canine Thy-1, is likely recognized by both antimyelin and antilymphocyte antibodies in canine distemper.
    • These antibodies may be produced during the lymphotropic phase of canine distemper virus infection.
    • The findings suggest a potential model for autoimmune phenomena, such as those in multiple sclerosis, possibly triggered by infections in lymphoid tissues.