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Roles of nitric oxide in carcinogenesis. Protumorigenic effects

Maciej Stepnik1

  • 1Department of Toxicology and Carcinogenesis Nofer Institute of Occupational Medicine, Lódź, Poland. mstep@imp.lodz.pl

International Journal of Occupational Medicine and Environmental Health
|December 5, 2002
PubMed

Insights

Nitric oxide (NO) plays a complex role in cancer, with potential to both promote tumor growth and inhibit it. Further research is needed to fully understand its dual effects in cancer development.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Nitric oxide (NO) is a key signaling molecule in human physiology and pathology.
  • Its role in cancer initiation and progression is multifaceted and not fully elucidated.
  • Understanding NO's impact is crucial for cancer research.

Purpose of the Study:

  • To review the protumorigenic mechanisms of NO in cancer.
  • To examine NO's effects on tumor cell growth, angiogenesis, invasiveness, and metastasis.
  • To present evidence for NO's potential antitumorigenic effects.

Main Methods:

  • Literature review of studies on nitric oxide synthases (NOS) activity and expression in human tumors.
  • Analysis of NO-mediated genotoxicity and mutagenicity.
  • Compilation of data on NO's role in tumor progression and potential anti-cancer effects.

Main Results:

  • NO can exert protumorigenic effects through genotoxicity and mutagenicity.
  • Elevated NOS activity/expression is observed in various human tumors.
  • NO contributes to tumor progression by influencing cell growth, angiogenesis, invasion, and metastasis.
  • Some studies suggest NO also possesses antitumorigenic properties.

Conclusions:

  • Nitric oxide has a dual role in cancer, exhibiting both pro- and anti-tumorigenic effects.
  • The net effect of NO in cancer development depends on various factors, including concentration and cellular context.
  • Further investigation is required to clarify NO's complex involvement in tumorigenesis.

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