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Related Experiment Videos

Apoptosis and chemical carcinogenesis

D S Marsman1, J C Barrett

  • 1Environmental Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709.

Risk Analysis : an Official Publication of the Society for Risk Analysis
|June 1, 1994
PubMed
Summary

Apoptosis, or programmed cell death, counteracts chemical carcinogenesis by eliminating mutated cells. Selective apoptosis of initiated cells can prevent cancer, while inhibiting apoptosis promotes tumor growth.

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Area of Science:

  • Cellular Biology
  • Toxicology
  • Carcinogenesis

Background:

  • Apoptosis (programmed cell death) is crucial for organogenesis and tissue homeostasis.
  • It balances cell division and cell death, influencing cell growth and differentiation.
  • Apoptosis's role in chemical carcinogenesis is increasingly recognized.

Purpose of the Study:

  • To explore the role of apoptosis in chemical carcinogenesis.
  • To draw parallels between apoptosis and proliferative events in cancer development.
  • To understand how selective apoptosis or its inhibition impacts tumor promotion.

Main Methods:

  • Review of existing literature on apoptosis and chemical carcinogenesis.
  • Analysis of the interplay between cell proliferation and programmed cell death.

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  • Examination of specific carcinogens and their effects on apoptosis.

    • Main Results:

    • Enhanced cell replication can increase mutation frequency.
    • Apoptosis counteracts chemical carcinogenesis by removing mutated cells.
    • Inhibition of apoptosis in initiated cells promotes tumor growth, while selective apoptosis has an anticarcinogenic effect.

    Conclusions:

    • Selective apoptosis, alongside cell replication, explains varied carcinogen effects.
    • Cell turnover (growth and death) is central to chemically induced carcinogenesis.
    • Understanding apoptosis is key to assessing human relevance of animal carcinogenicity studies.