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Oxidative stress and oxidative damage in carcinogenesis

James E Klaunig1, Lisa M Kamendulis, Barbara A Hocevar

  • 1Indiana University School of Medicine, Indianapolis, IN 46202, USA. jklauni@iupui.edu

Toxicologic Pathology
|December 19, 2009
PubMed

Insights

Reactive oxygen species (ROS) contribute to cancer development by damaging DNA and altering gene expression. Genetic variations in DNA repair and antioxidant genes may influence cancer susceptibility.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Carcinogenesis is a multistep process involving cellular mutations and clonal expansion.
  • Chemical and physical agents can induce or modulate carcinogenesis, often via reactive oxygen species (ROS).

Purpose of the Study:

  • To discuss the role of ROS in carcinogenesis.
  • To explore how ROS-induced oxidative damage and altered gene expression contribute to cancer development.
  • To examine the association between genetic variations in oxidative DNA repair and antioxidant genes and human cancer susceptibility.

Main Methods:

  • Review of scientific literature on ROS, oxidative stress, and carcinogenesis.
  • Analysis of signaling pathways (Nrf2, NF-kappaB) affected by ROS.
  • Examination of evidence linking single nucleotide polymorphisms (SNPs) in relevant genes to cancer risk.

Main Results:

  • ROS production is a key mechanism by which carcinogens induce cancer.
  • Oxidative damage to macromolecules and altered gene expression driven by ROS signaling contribute to cancer progression.
  • SNPs in oxidative DNA repair and antioxidant genes are associated with human cancer susceptibility.

Conclusions:

  • ROS play a significant role in the multistep process of carcinogenesis.
  • Understanding ROS biology and genetic factors is crucial for cancer prevention and treatment strategies.

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