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Related Experiment Videos

Virus interference by cellular double-stranded ribonucleic acid.

P C Kimball, P H Duesberg

    Journal of Virology
    |June 1, 1971
    PubMed
    Summary

    Double-stranded ribonucleic acid (RNA) from various cells inhibits virus growth. This RNA exhibits properties of double-stranded RNA and its antiviral activity is sensitive to melting and sedimentation.

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    Area of Science:

    • Molecular Biology
    • Virology
    • Cell Biology

    Background:

    • Ribonucleic acid (RNA) plays crucial roles in cellular processes.
    • Certain RNA structures can influence viral replication.
    • Understanding RNA properties is key to antiviral strategies.

    Purpose of the Study:

    • To isolate and characterize ribonuclease-resistant RNA from mammalian and avian cells.
    • To investigate the antiviral properties of this RNA.
    • To determine the structural characteristics of the interference-inducing RNA.

    Main Methods:

    • Isolation of uridine-labeled RNA from rabbit kidney, chicken embryo, and HeLa cells.
    • Assay of interference with virus growth in cell cultures.
    • Characterization using agarose gel electrophoresis, melting profiles, Cs2SO4 density gradients, and velocity sedimentation.

    Main Results:

    • Ribonuclease-resistant RNA isolated from various cell types induced interference with virus growth.
    • The RNA exhibited properties characteristic of double-stranded RNA, including melting profiles and density.
    • Antiviral activity was lost upon melting, and higher molecular weight RNA showed greater activity.

    Conclusions:

    • Cellular ribonuclease-resistant RNA, likely double-stranded, possesses significant antiviral activity.
    • The structural integrity of this double-stranded RNA is essential for its interference-inducing capacity.
    • Cellular double-stranded RNA biosynthesis is sensitive to actinomycin D.

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