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Related Experiment Videos

Clonal depletion in neonatal tolerance.

H Köhler, D R Kaplan, D S Strayer

    Science (New York, N.Y.)
    |November 15, 1974
    PubMed
    Summary
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    Neonatal mice treated with antireceptor antibodies experience specific depletion of antigen-responsive cells. Adult mice, however, show reversible blockade of responsive cells, indicating distinct immune responses based on age.

    Area of Science:

    • Immunology
    • Developmental Immunology
    • Autoimmunity

    Background:

    • Inducing specific unresponsiveness is crucial for understanding immune tolerance.
    • Antibody-mediated immune modulation offers potential therapeutic strategies.

    Purpose of the Study:

    • To investigate the distinct effects of antireceptor antibodies on immune responses in neonatal versus adult BALB/c mice.
    • To elucidate the mechanisms underlying age-dependent immune suppression induced by antireceptor antibodies.

    Main Methods:

    • Utilizing indirect fluorescence technique to quantify antigen-responsive cells.
    • Administering heterologous antireceptor antibody to neonatal and adult BALB/c mice.
    • Assessing cell responsiveness after brief incubation periods.

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    Main Results:

    • Neonatal treatment with antireceptor antibody led to a significant depletion of antigen-responsive clones.
    • Adult treatment with antireceptor antibody resulted in reversible blockade of responsive cells.
    • Indirect fluorescence revealed fewer fluorescent cells in treated animals compared to controls.

    Conclusions:

    • Neonatal exposure to antireceptor antibodies induces specific clonal deletion, establishing long-term tolerance.
    • Adult exposure to antireceptor antibodies causes transient functional suppression, not clonal elimination.
    • Age is a critical factor in determining the outcome of antireceptor antibody-induced immune modulation.