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Immunological defects in SJL mice.

P R Hutchings, A M Varey, A Cooke

    Immunology
    |November 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    SJL mice exhibit a dual immune defect, lacking suppressor T-cells and showing impaired B-cell antibody responses to specific antigens. This contrasts with DBA mice, which have intact B-cell function.

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    Area of Science:

    • Immunology
    • Cellular Immunology
    • Mouse Models in Immunology

    Background:

    • SJL mice are known to have a defect in developing suppressor T-cells after stimulation with Concanavalin A (Con A).
    • Most mouse strains spontaneously produce antibodies against bromelain-treated autologous red blood cells (BrMRBC) in vitro, but SJL mice do not.
    • Understanding these immune deficiencies is crucial for studying immune regulation and B-cell function.

    Purpose of the Study:

    • To investigate the immune cell defects in SJL mice, specifically focusing on suppressor T-cell and B-cell responses.
    • To compare the immune profiles of SJL mice with DBA mice regarding antibody production and mitogen responses.
    • To elucidate potential functional B-cell defects in SJL mice.

    Main Methods:

    • Stimulation of SJL mice with Concanavalin A (Con A) to assess T-cell suppressor cell development and proliferative responses.

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  • In vitro assessment of spontaneous antibody response to bromelain-treated autologous red blood cells (BrMRBC).
  • In vivo stimulation with Lipopolysaccharide (LPS) to evaluate antibody-forming cell responses to BrMRBC, Sheep Red Blood Cells (SRBC), and Trinitrophenyl (TNP) conjugates.

    • Main Results:

    • SJL mice demonstrated a defect in developing suppressor T-cells upon Con A stimulation but maintained normal proliferative responses.
    • SJL mice failed to mount a spontaneous antibody response to BrMRBC in vitro and showed no increase in antibody-forming cells after LPS stimulation.
    • DBA mice had limited BrMRBC antibody-forming cells but responded to LPS in vivo with increased SRBC and TNP antibody responses, indicating functional B-cells.

    Conclusions:

    • SJL mice possess a distinct suppressor T-cell defect and a potential functional B-cell defect, evidenced by their inability to produce specific antibodies.
    • The findings highlight unique immunological characteristics of SJL mice compared to other strains like DBA.
    • Further research is warranted to fully characterize the B-cell defect in SJL mice and its implications for immune responses.