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Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency
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Published on: June 16, 2011

Increased resistance of an interferon-resistant cell subline to the toxic effect of double-stranded RNA

V Lackovic, L Borecký

    Acta Virologica
    |August 1, 1976
    PubMed

    Insights

    Double-stranded (ds) RNA toxicity was compared between L cells and an interferon-resistant subline. The resistant cells showed significantly higher resistance to ds RNA, highlighting the role of interferon in cellular defense against viral RNA.

    Area of Science:

    • Virology
    • Cell Biology
    • Immunology

    Background:

    • Interferon (IFN) is a crucial component of the innate immune system, mediating cellular defense against viral infections.
    • Double-stranded RNA (dsRNA) is a common intermediate in viral replication and a potent inducer of antiviral responses.
    • Cellular sensitivity to dsRNA can be modulated by various factors, including IFN treatment.

    Purpose of the Study:

    • To compare the toxicity of f2-phage double-stranded RNA (dsRNA) in standard L cells versus an interferon-resistant L cell subline (CVS cells).
    • To investigate the influence of interferon concentration on dsRNA-induced cellular toxicity.

    Main Methods:

    • Exposure of L cells and CVS cells to varying concentrations of f2-phage dsRNA.
    • Treatment of cells with different concentrations of interferon prior to dsRNA exposure.
    • Assessment of cellular toxicity following dsRNA treatment.

    Main Results:

    • The interferon-resistant CVS cell subline exhibited approximately 20-fold greater resistance to dsRNA toxicity compared to the parent L cells.
    • The level of dsRNA toxicity was directly correlated with the concentration of interferon the cells were previously exposed to.

    Conclusions:

    • Interferon treatment significantly enhances cellular sensitivity to the toxic effects of dsRNA.
    • The development of interferon resistance in cells confers substantial protection against dsRNA-induced toxicity.
    • These findings underscore the critical role of the interferon pathway in cellular defense mechanisms against viral RNA.

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