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Multiple genetic alterations in human carcinogenesis.

T Sugimura1, M Terada, J Yokota

  • 1National Cancer Center Research Institute, Tokyo, Japan.

Environmental Health Perspectives
|November 1, 1992
PubMed
Summary
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Cancer develops in multiple stages, involving numerous genetic alterations from various environmental factors. Understanding this multistep process is crucial for effective cancer prevention strategies.

Area of Science:

  • Oncology
  • Genetics
  • Environmental Health

Background:

  • Epidemiological studies suggest cancer is a multistage process.
  • Precancerous lesions are observed in various neoplasias.
  • Human cancers involve multiple genetic alterations.

Purpose of the Study:

  • To highlight cancer as a multistage process.
  • To emphasize the role of multiple genetic alterations.
  • To consider environmental factors in carcinogenesis.

Main Methods:

  • Review of epidemiological studies.
  • Analysis of genetic alterations in cancer.
  • Consideration of environmental carcinogenic substances.

Main Results:

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  • Cancers exhibit multiple genetic alterations (mutations, amplifications, deletions).
  • Increased malignancy correlates with more genetic alterations.
  • Environmental factors contribute to multistep carcinogenesis.

Conclusions:

  • Carcinogenesis is a multistep process involving multiple genetic alterations.
  • Environmental risks must be assessed considering multistep carcinogenesis.
  • Multiple prevention approaches are needed for multistep carcinogenesis.