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Related Experiment Videos

T mitogens trigger LPS responsiveness in mouse thymus cells.

J T Forbes, Y Nakao, R T Smith

    Journal of Immunology (Baltimore, Md. : 1950)
    |March 1, 1975
    PubMed
    Summary
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    Mouse thymus cells become responsive to lipopolysaccharide (LPS) when combined with T cell mitogens. This suggests LPS triggering involves interaction with specific T cell subpopulations.

    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Mouse thymus cells typically show minimal response to lipopolysaccharide (LPS).
    • Investigating factors that enhance thymus cell responsiveness to LPS is crucial for understanding immune cell activation.

    Purpose of the Study:

    • To determine if T cell mitogens can induce responsiveness in mouse thymus cells to lipopolysaccharide (LPS).
    • To identify characteristics of thymus cell subpopulations involved in LPS-induced DNA synthesis.

    Main Methods:

    • Culturing mouse thymus cells with concanavalin A or mitomycin-treated allogeneic spleen cells in the presence of LPS.
    • Assessing DNA synthesis as a measure of cellular response.
    • Analyzing cell subpopulations based on net buoyant density.

    Main Results:

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    • Thymus cells exhibited significant DNA synthesis when co-cultured with LPS and either concanavalin A or submitogenic allogeneic spleen cells.
    • The dose-response kinetics observed were characteristic of LPS stimulation.
    • The responsive cell subpopulation was found to be of low net buoyant density.
    • Phytohemagglutinin and pokeweed mitogen did not show synergistic effects with LPS in this model.

    Conclusions:

    • LPS-induced triggering of thymus cells may involve synergistic interactions with specific T cell subpopulations.
    • The findings indicate a potential role for T cells in mediating LPS responses in the thymus.