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Mechanisms of tumor promotion by reactive oxygen species

Authors
  • Kobliakov, V. A.1
  • 1 Russian Academy of Medical Sciences, Blokhin Russian Cancer Research Center, Kashirskoe Shosse 24, Moscow, 115478, Russia , Moscow (Russia)
Type
Published Article
Journal
Biochemistry (Moscow)
Publisher
Pleiades Publishing
Publication Date
Jun 24, 2010
Volume
75
Issue
6
Pages
675–685
Identifiers
DOI: 10.1134/S0006297910060015
Source
Springer Nature
Keywords
License
Yellow

Abstract

This review analyzes the available information concerning mechanisms of non-genotoxic action of reactive oxygen species (ROS) during tumor promotion and pathways of their generation under the influence of chemical compounds. Special attention is given to the ability of ROS to induce pseudohypoxia through inhibition of prolyl oxidase, which is an oxygen sensor in the cell. Functions of HIF-1α as a main contributor to the ROS-induced promotion are analyzed. Data suggest that an unregulated high level of HIF-1α in the cell could induce the development of tumors. Hypothetical possibilities of ROS production under the influence of different environmental pollutants, which are promoters of tumorigenesis, include functioning of cytochrome P450 during oxidation of substrates, functioning of the mitochondrial respiratory chain, and action of peroxisome proliferators.

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