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Monitoring Activation of the Antiviral Pattern Recognition Receptors RIG-I And PKR By Limited Protease Digestion and Native PAGE
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Regulation of the interferon-induced PKR: can viruses cope?

M G Katze1

  • 1Dept of Microbiology, School of Medicine, University of Washington, Seattle 98195, USA.

Trends in Microbiology
|February 1, 1995
PubMed

Insights

Many viruses downregulate the double-stranded-RNA-activated protein kinase (PKR) to survive. This interferon-induced kinase may also control cell growth and proliferation, indicating its role in the interferon response.

Area of Science:

  • Virology
  • Immunology
  • Cell Biology

Background:

  • Viruses often encounter host defense mechanisms, including interferon-induced proteins.
  • The double-stranded-RNA-activated protein kinase (PKR) is a key component of the antiviral interferon response.

Purpose of the Study:

  • To investigate the importance of PKR in viral survival.
  • To explore the potential roles of PKR beyond antiviral defense, such as in cell growth regulation.

Main Methods:

  • Analysis of viral strategies to counteract host defenses.
  • Review of existing literature on PKR function in infected and uninfected cells.

Main Results:

  • Viruses that cannot inhibit PKR's lethal effects are often eliminated.
  • PKR's function may extend to regulating cell proliferation in uninfected cells.

Conclusions:

  • Downregulation of PKR is crucial for many viruses to evade host immunity.
  • PKR likely plays a significant role in the antiproliferative effects of the interferon response.

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