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Ex Vivo Infection of Live Tissue with Oncolytic Viruses
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Oncogenic viruses and cancer

Alicja Warowicka1, Robert Nawrot2, Justyna Broniarczyk2

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Oncogenic viruses, or oncoviruses, contribute to about 12% of human cancers. These viruses can cause cancer by disrupting host cell genes or through their own oncogenes, but require additional factors for full transformation.

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Area of Science:

  • Virology
  • Oncology
  • Molecular Biology

Background:

  • Oncogenic viruses (oncoviruses) are linked to approximately 12% of human cancers.
  • Known oncoviruses include Hepatitis B and C viruses (HBV, HCV), Human Papillomaviruses (HPV), Merkel Cell Polyomavirus (MCV), Human Herpesvirus-8 (HHV-8), Epstein-Barr Virus (EBV), and Human T-cell lymphotropic virus-1 (HTLV-1).

Purpose of the Study:

  • To elucidate the mechanisms by which oncoviruses contribute to human carcinogenesis.
  • To highlight that oncoviruses are not complete carcinogens and require co-factors for transformation.

Main Methods:

  • Review of existing literature on viral oncogenesis.
  • Analysis of the molecular mechanisms of viral DNA integration and oncogene expression.
  • Examination of the role of viral oncoproteins in cellular process dysregulation.

Main Results:

  • Oncoviruses can disrupt host cell regulatory genes by integrating viral genomes into the host DNA.
  • Some oncoviruses possess viral oncogenes (v-onc) that directly dysregulate cellular processes.
  • Oncoviral transformation is a multifactorial process, not solely dependent on the virus itself.

Conclusions:

  • Oncoviruses play a significant role in a subset of human cancers through diverse molecular mechanisms.
  • Understanding the interplay between oncoviruses and host factors is crucial for cancer prevention and treatment strategies.
  • Further research into viral oncogenesis can identify novel therapeutic targets.