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Changes in suppressor mechanisms during postnatal development in mice.

C E Calkins, O Stutman

    The Journal of Experimental Medicine
    |January 1, 1978
    PubMed
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    Spleen cells from young and adult mice suppress antibody responses, but the suppressor cells differ. Early-life suppressor cells lack specificity and Thy.1.2 markers, unlike adult suppressor cells.

    Area of Science:

    • Immunology
    • Developmental Biology

    Background:

    • Suppressor cells play a critical role in regulating immune responses.
    • The ontogeny and characteristics of these cells during early life are not fully understood.

    Purpose of the Study:

    • To investigate the age-dependent activity and characteristics of splenic suppressor cells in mice.
    • To compare suppressor cell function and phenotype in early development versus adulthood.

    Main Methods:

    • Assessing suppressor cell activity by adding spleen cells from mice of different ages to cultures of normal or SRBC-immune spleen cells challenged with SRBC.
    • Evaluating the specificity of suppression and the effect of anti-Thy.1.2 treatment.
    • Characterizing suppressor cells based on adherence properties and presence in the thymus.

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    Main Results:

    • Spleen cells from 1-week-old and adult mice exhibited strong suppression of the secondary in vitro antibody response to SRBC.
    • Spleen cells from 3-week-old mice showed less suppressive activity.
    • Adult suppressor cells were specific and Thy.1.2 positive, while 1-week-old suppressor cells were non-specific, Thy.1.2 insensitive, nonadherent, and not found in the thymus.

    Conclusions:

    • The function and phenotype of splenic suppressor cells undergo significant changes during early murine development.
    • Early-life suppressor cells possess distinct characteristics compared to their adult counterparts, suggesting developmental regulation of immune suppression.