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Related Experiment Videos

Immunological reactivity between chimeric cattle twins. II. Normal lymphocyte transfer

D Emery, P McCullagh

    Transplantation
    |January 1, 1980
    PubMed
    Summary

    Normal calves showed immune responses to foreign lymphocytes, but chimeric calves did not react to their twin

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    Area of Science:

    • Immunology
    • Veterinary Science
    • Cell Biology

    Background:

    • Understanding immune tolerance is crucial for transplantation and autoimmune disease research.
    • Calf models offer insights into immune system development and responses.

    Purpose of the Study:

    • To investigate the immune response of normal and chimeric calves to allogeneic and cotwin lymphocytes.
    • To assess immune tolerance in chimeric animals.

    Main Methods:

    • Subcutaneous injection of allogeneic lymphocytes into normal calves.
    • Injection of allogeneic and cotwin lymphocytes into chimeric calves.
    • Monitoring for local dermal swelling, blast cell efflux, and specific cytolytic antibody production.

    Main Results:

    • Normal calves exhibited local swelling and immune cell activation upon receiving allogeneic lymphocytes.
    • Chimeric calves showed no heightened immune response to cotwin lymphocytes compared to controls.
    • No significant reduction in lymphocyte responsiveness was observed in normal calves after allogeneic cell challenge.

    Conclusions:

    • Chimeric calves demonstrate tolerance to cotwin lymphocytes, indicating successful immune adaptation.
    • Allogeneic cell exposure in normal calves elicits a standard immune response without inducing lasting hyporesponsiveness.

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