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Overview: viral agents and cancer

N Mueller1

  • 1Harvard School of Public Health, Boston, Massachusetts, USA. mueller@episun1.harvard.edu

Environmental Health Perspectives
|November 1, 1995
PubMed
Summary

Several common viruses are probable causes of specific cancers, often linked to persistent infections or weakened immunity. Vaccines are limited, highlighting the need for further research into viral oncogenesis and prevention strategies.

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Area of Science:

  • Virology
  • Oncology
  • Infectious Diseases

Background:

  • Many common viruses establish persistent infections, contributing to cancer development.
  • Viral activation and host immune status are key factors in virus-associated oncogenesis.
  • Specific virus-malignancy associations include HBV/HCV with liver cancer, HTLV-1 with ATL, EBV with lymphomas/nasopharyngeal carcinoma, and HPV with cervical cancer.

Purpose of the Study:

  • To review the causal roles of common viruses in specific malignancies.
  • To highlight the mechanisms of viral oncogenesis.
  • To discuss the public health implications of these virus-malignancy systems.

Main Methods:

  • Literature review of established virus-malignancy associations.
  • Analysis of viral persistence, activation, and host immune factors in cancer etiology.
  • Examination of epidemiological data on virus-associated cancers.

Main Results:

  • Hepatitis B and C viruses are linked to hepatocellular carcinoma.
  • Human T-lymphotropic virus-1 is associated with adult T-cell leukemia/lymphoma.
  • Epstein-Barr virus is implicated in Burkitt's lymphoma, nasopharyngeal carcinoma, and Hodgkin's disease.
  • Human papillomavirus is a primary cause of cervical cancer.
  • Vaccines are available only for HBV among these major associations.
  • These cancers often occur in early to mid-life and can be opportunistic in HIV-1 infected individuals.

Conclusions:

  • Viruses are significant etiological factors in numerous human cancers.
  • Understanding viral oncogenesis is crucial for developing targeted prevention and treatment strategies.
  • The limited availability of vaccines underscores the ongoing challenge in controlling virus-associated malignancies.

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