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Techniques to Induce and Quantify Cellular Senescence
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Enhanced Viral Replication by Cellular Replicative Senescence.

Ji-Ae Kim1, Rak-Kyun Seong1, Ok Sarah Shin1

  • 1Brain Korea 21 Plus for Biomedical Science, College of Medicine, Korea University, Seoul 08308, Korea.

Immune Network
|November 2, 2016
PubMed
Summary
This summary is machine-generated.

Cellular senescence enhances viral replication, including influenza virus (IFV) and Varicella Zoster Virus (VZV). This occurs because senescence reduces virus-induced type I interferon expression, despite intact antiviral responses.

Keywords:
InfluenzaSIRT1SenescenceVZV

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Area of Science:

  • Gerontology
  • Virology
  • Cellular Biology

Background:

  • Cellular replicative senescence is a key factor in aging and age-related diseases.
  • Understanding how senescence affects viral infections is crucial for public health.

Purpose of the Study:

  • To investigate the replication efficiency of influenza virus (IFV) and Varicella Zoster Virus (VZV) in senescent cells.
  • To explore the underlying mechanisms of altered viral replication in senescence.

Main Methods:

  • Primary human bronchial epithelial cells (HBE) and human dermal fibroblasts (HDF) were induced into replicative senescence.
  • Senescence was validated using senescence-associated β-galactosidase staining.
  • Viral infection susceptibility, plaque formation, viral antigen expression, and type I interferon (IFN) responses were assessed.

Main Results:

  • Senescent HBE and HDF cells showed increased susceptibility to IFV and VZV, respectively.
  • Higher viral replication and antigen expression were observed in senescent cells compared to non-senescent cells.
  • Senescence attenuated virus-induced type I IFN mRNA expression but not the IFN-mediated antiviral effect.

Conclusions:

  • Cellular senescence enhances viral replication, potentially due to reduced virus-induced type I IFN expression.
  • The longevity gene sirtuin 1 (SIRT1) demonstrates an antiviral role against influenza virus.
  • These findings highlight a link between senescence, immune response, and viral pathogenesis.