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Related Experiment Videos

Modulation of cellular macromolecular synthesis by coronavirus: implication for pathogenesis

S Kyuwa1, M Cohen, G Nelson

  • 1Department of Microbiology, University of Southern California School of Medicine, Los Angeles 90033.

Journal of Virology
|October 1, 1994
PubMed
Summary

Murine coronavirus JHM infection reduces major histocompatibility complex class I (MHC-I) on cell surfaces. While actin mRNA decreased, MHC-I and tubulin mRNA levels were only slightly affected, with increases in inflammatory cytokine mRNAs.

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Area of Science:

  • Virology
  • Immunology
  • Molecular Biology

Background:

  • Murine coronavirus strain JHM (JHMV) is a neurotropic virus known to affect host immune responses.
  • Cell surface expression of major histocompatibility complex class I (MHC-I) antigens is crucial for immune surveillance and T-cell recognition.

Purpose of the Study:

  • To investigate the impact of JHMV infection on the expression of MHC-I antigens at the cell surface.
  • To analyze the effects of JHMV infection on the mRNA levels of specific cellular and viral components.

Main Methods:

  • Northern blot analysis was employed to quantify mRNA levels.
  • Cell surface expression of MHC-I antigens was assessed following JHMV infection.

Main Results:

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  • JHMV infection led to a decrease in cell surface MHC-I expression.
  • Northern blot analysis revealed a rapid reduction in actin mRNA levels.
  • MHC-I and tubulin mRNA levels showed only slight reductions, while interleukin-1 beta, colony-stimulating factor 1 receptor, and tumor necrosis factor alpha mRNA levels increased post-infection.

    • Conclusions:

    • JHMV infection modulates host gene expression, impacting MHC-I antigen presentation.
    • The observed changes in mRNA levels suggest a complex interplay between viral infection and host inflammatory responses.