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Related Experiment Videos

Cell injury with viruses.

I Tamm

    The American Journal of Pathology
    |October 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Picornavirus infection early inhibits host cell protein and RNA synthesis, requiring minimal viral protein production. Later, significant viral protein synthesis drives severe cell damage, but early biosynthetic changes aren't the sole cause.

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    Area of Science:

    • Virology
    • Cellular Biology
    • Molecular Biology

    Background:

    • Picornavirus infections rapidly alter host cell functions.
    • Understanding early viral effects on cellular synthesis is crucial for comprehending viral pathogenesis.

    Purpose of the Study:

    • To investigate the timing and requirements of early picornavirus-induced alterations in host cellular biosynthetic processes.
    • To differentiate early, minimally protein-dependent changes from later, protein-dependent pathogenic events.

    Main Methods:

    • Analysis of cellular protein, RNA, and DNA synthesis inhibition in picornavirus-infected cells.
    • Assessment of phospholipid synthesis stimulation.
    • Correlation of viral protein synthesis levels with specific cellular pathologies.

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    Main Results:

    • Early inhibition of host protein and RNA synthesis requires limited viral protein synthesis.
    • Inhibition of protein synthesis involves ribosome-mRNA binding blockage; RNA synthesis affects template-enzyme complexes.
    • Stimulation of phospholipid synthesis also occurs early; later pathologies depend on extensive viral protein synthesis.

    Conclusions:

    • Early picornavirus-induced changes in host cell biosynthesis are distinct from later, more severe cytopathic effects.
    • While early alterations are necessary, they do not solely account for the extensive membrane and chromosomal damage observed later in infection.