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Interferon priming. Effects on interferon messenger RNA.

S L Abreu, F C Bancroft, W E Stewart

    The Journal of Biological Chemistry
    |May 25, 1979
    PubMed
    Summary
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    Priming mouse cells with interferon significantly boosts interferon production and speeds up its appearance. This enhancement in interferon response is likely due to more efficient translation of interferon mRNA, not increased mRNA levels.

    Area of Science:

    • Immunology
    • Molecular Biology
    • Cell Biology

    Background:

    • Interferons are crucial cytokines involved in antiviral defense.
    • Cellular priming with interferon can modulate subsequent responses to viral induction.
    • Understanding the mechanisms behind enhanced interferon production is key to developing effective antiviral strategies.

    Purpose of the Study:

    • To investigate the effects of interferon priming on interferon and interferon mRNA production in mouse L929 cells.
    • To determine the kinetics of interferon and interferon mRNA appearance and disappearance in primed versus non-primed cells.
    • To elucidate the molecular mechanisms underlying enhanced interferon production in primed cells.

    Main Methods:

    • Mouse L929 cells were divided into primed (interferon-treated) and non-primed groups.

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  • Both groups were induced with Newcastle disease virus to stimulate interferon production.
  • Interferon levels, interferon mRNA detection, and resistance to actinomycin D inhibition were measured over time.

    • Main Results:

    • Primed cells produced 3-10 times more interferon than non-primed cells.
    • Interferon and interferon mRNA appeared 2-4 hours earlier in primed cells.
    • Despite earlier appearance and higher production, total interferon mRNA levels and half-life were similar in both groups.
    • Primed cells showed earlier resistance to actinomycin D inhibition.

    Conclusions:

    • Interferon priming enhances the speed and magnitude of interferon production.
    • The enhanced interferon response in primed cells is not due to increased interferon mRNA quantity or stability.
    • Enhanced translation efficiency of interferon mRNA is the likely mechanism for increased interferon production in primed cells.