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Related Experiment Videos

A mouse model for varicella-zoster virus latency

Z Wroblewska1, T Valyi-Nagy, J Otte

  • 1Wistar Institute, Philadelphia, PA 19104.

Microbial Pathogenesis
|August 1, 1993
PubMed
Summary

A new mouse model for varicella-zoster virus (VZV) infection was developed. This model shows VZV establishes a latent infection, spreading via viremia and axonal transport, crucial for understanding VZV latency.

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Area of Science:

  • Virology
  • Immunology
  • Neuroscience

Background:

  • Varicella-zoster virus (VZV) establishes lifelong latency in humans after primary infection.
  • The molecular mechanisms of VZV latency are poorly understood due to the absence of suitable animal models.

Purpose of the Study:

  • To develop and characterize a mouse model for VZV infection to study VZV latency.
  • To investigate the viral spread and establishment of infection in mice.

Main Methods:

  • Corneal inoculation of mice with VZV.
  • Polymerase Chain Reaction (PCR) to detect viral DNA.
  • In situ hybridization to detect VZV mRNA.
  • Immunostaining to detect viral proteins.

Main Results:

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  • Mice infected via corneal inoculation did not exhibit disease symptoms.
  • VZV DNA was detected in over 60% of mice at 33 days post-infection.
  • VZV DNA was predominantly found in trigeminal ganglia and brain stem, with lower detection in kidneys, spleen, liver, and brain.
  • VZV mRNA was detected in trigeminal ganglia, brain stem, cerebellum, and spleen.
  • No viral proteins were detected in any tissues.

Conclusions:

  • The developed mouse model supports VZV infection and establishment of a non-productive (latent) state.
  • VZV appears to spread in mice through both viremia and axonal transport.
  • This model provides a valuable tool for future research into VZV latency and pathogenesis.