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Related Experiment Videos

Characterization of guinea pig mitogenic factor.

J A Mills

    Journal of Immunology (Baltimore, Md. : 1950)
    |January 1, 1975
    PubMed
    Summary

    Guinea pig mitogenic factor (M.F.) stimulates DNA synthesis in non-immune lymphocytes. This heat-stable factor, with a molecular weight of 20-30 kDa, is produced by lymphocytes after antigen exposure.

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    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Lymphocyte activation is crucial for adaptive immune responses.
    • Understanding soluble factors mediating lymphocyte proliferation is key to immune regulation.

    Purpose of the Study:

    • To identify and characterize a mitogenic factor produced by antigen-stimulated guinea pig lymphocytes.
    • To investigate the properties and kinetics of this mitogenic factor.

    Main Methods:

    • Culture of guinea pig lymph node lymphocytes with antigen.
    • Assay of culture supernatants for the ability to stimulate DNA synthesis in non-immune lymphocytes.
    • Characterization of the factor's stability, molecular weight, and enzymatic resistance.

    Main Results:

    • A mitogenic factor (M.F.) was identified in supernatants of antigen-stimulated lymphocytes.
    • M.F. stimulated DNA synthesis in non-immune lymphocytes, independent of antigen presence.
    • Production peaked at 24 hours, with maximal DNA synthesis at 48 hours.
    • M.F. was heat-stable (60°C), had a molecular weight of 20-30 kDa, and was resistant to proteases.

    Conclusions:

    • Guinea pig mitogenic factor is a heat-stable molecule produced by lymphocytes post-antigen stimulation.
    • M.F. plays a role in lymphocyte proliferation and immune responses.
    • Its properties suggest it may be a lymphokine involved in cell-mediated immunity.

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