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p53-mediated cellular response to DNA damage in cells with replicative hepatitis B virus

A Puisieux1, J Ji, C Guillot

  • 1Laboratoire d'Oncologie Moléculaire, Institut National de la Santé et de la Recherche Médicale CJF 9302, Centre Léon Bérard, Lyon, France.

Proceedings of the National Academy of Sciences of the United States of America
|February 28, 1995
PubMed

Insights

Hepatitis B virus replication does not affect the tumor suppressor functions of the p53 gene, which protects cells from DNA damage. This study investigated the p53-mediated cellular response in hepatoma cells with active hepatitis B virus.

Area of Science:

  • Molecular Biology
  • Oncology
  • Virology

Background:

  • The p53 gene is a crucial tumor suppressor, halting cell cycle progression or inducing apoptosis in response to DNA damage.
  • Oncogenic DNA viruses often inactivate p53's tumor suppressor activity, disrupting cellular responses to DNA damage.

Purpose of the Study:

  • To investigate whether hepatitis B virus (HBV) interferes with the p53-mediated cellular response to DNA damage.
  • To determine if HBV replication impacts the tumor suppressor functions of p53.

Main Methods:

  • Studied the p53-mediated cellular response to DNA damage in hepatoma cells.
  • Utilized hepatoma cell line 2215 containing replicative hepatitis B virus.

Main Results:

  • Hepatitis B virus replication was confirmed in the studied hepatoma cells.
  • No interference was observed between hepatitis B virus replication and the known cellular functions of the p53 protein.

Conclusions:

  • Hepatitis B virus replication does not inhibit the tumor suppressor activity of wild-type p53.
  • The cellular response to DNA damage mediated by p53 remains functional in the presence of replicative hepatitis B virus.

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