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Related Experiment Video

Updated: Mar 21, 2026

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p53 Is a Host Cell Regulator during Herpes Simplex Encephalitis.

Yuhei Maruzuru1,2,3, Naoto Koyanagi1,2, Naoki Takemura4,5

  • 1Division of Molecular Virology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.

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|May 13, 2016
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The tumor suppressor p53 protein is essential for efficient herpes simplex virus 1 (HSV-1) replication and pathogenesis in the mouse central nervous system (CNS). P53 deficiency significantly reduces viral load and mortality in mice with herpes simplex encephalitis.

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Area of Science:

  • Virology
  • Immunology
  • Neuroscience

Background:

  • Herpes simplex virus 1 (HSV-1) can cause fatal encephalitis, with limited understanding of host cell factors influencing its central nervous system (CNS) pathogenesis.
  • Previous studies focused on immunological regulators, leaving intrinsic host factors facilitating CNS HSV-1 infection underexplored.

Purpose of the Study:

  • To investigate the role of the host cell factor p53 in HSV-1 replication and pathogenesis within the CNS in vivo.
  • To determine if p53 acts as a restriction factor or facilitator in CNS HSV-1 infection.

Main Methods:

  • Utilized p53-deficient (knockout) mice for intracranial inoculation with HSV-1.
  • Assessed viral replication in the brain and survival rates following infection.

Main Results:

  • p53 deficiency led to significantly reduced HSV-1 replication in the mouse brain.
  • Mice lacking p53 exhibited markedly lower mortality rates from herpes simplex encephalitis.
  • These findings contradict the typical role of p53 as a viral restriction factor.

Conclusions:

  • p53 is a critical host cell factor that positively regulates HSV-1 replication and pathogenesis in the CNS.
  • This study reveals a novel role for p53 in facilitating viral infection in vivo.
  • Understanding p53's mechanism could lead to new therapeutic strategies for herpes simplex encephalitis.