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Isolation Protocol of Mouse Monocyte-derived Dendritic Cells and Their Subsequent In Vitro Activation with Tumor Immune Complexes
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Published on: May 31, 2018

The effects of tumor necrosis factor on the production of interleukin-1 by macrophages

M K Hoffman

    Lymphokine Research
    |January 1, 1986
    PubMed

    Insights

    Tumor necrosis factor (TNF) significantly impacts interleukin-1 (IL-1) production in mouse macrophages. High TNF doses inhibit IL-1, while low doses induce synergistic factors and modest IL-1 activity.

    Area of Science:

    • Immunology
    • Cell Biology
    • Inflammation Research

    Background:

    • Interleukin-1 (IL-1) is a key cytokine in inflammatory responses.
    • Tumor Necrosis Factor (TNF) is a pro-inflammatory cytokine with complex regulatory roles.
    • Macrophages are critical immune cells involved in producing inflammatory mediators.

    Purpose of the Study:

    • To investigate the dose-dependent effects of TNF on IL-1 production by mouse macrophages.
    • To characterize the nature of factors induced by TNF in macrophages.
    • To understand the interaction between TNF and IL-1 signaling pathways.

    Main Methods:

    • Primary mouse macrophage cultures.
    • Stimulation with varying doses of TNF and bacterial lipopolysaccharide (LPS).
    • Quantification of IL-1 production using the LAF assay.
    • Neutralization of IL-1 activity with specific antibodies.

    Main Results:

    • High doses of TNF completely suppressed LPS-induced IL-1 production.
    • Low doses of TNF induced factors with modest IL-1-like activity, blockable by anti-IL-1 antibodies.
    • Low doses of TNF also induced factors that synergize with IL-1 in the LAF assay.

    Conclusions:

    • TNF exhibits a dose-dependent regulatory effect on IL-1 production in macrophages.
    • TNF can inhibit IL-1 production at high concentrations.
    • At low concentrations, TNF modulates IL-1 activity and induces synergistic factors, suggesting a complex role in immune regulation.

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