The DOI matches its Crossref record; 195 of the 195 references it cites were found in a registry or an index.
Role of oxygen radicals in DNA damage and cancer incidence
Abstract
The development of cancer in humans and animals is a multistep process. The complex series of cellular and molecular changes participating in cancer development are mediated by a diversity of endogenous and exogenous stimuli. One type of endogenous damage is that arising from intermediates of oxygen (dioxygen) reduction - oxygen-free radicals (OFR), which attacks not only the bases but also the deoxyribosyl backbone of DNA. Thanks to improvements in analytical techniques, a major achievement in the understanding of carcinogenesis in the past two decades has been the identification and quantification of various adducts of OFR with DNA. OFR are also known to attack other cellular components such as lipids, leaving behind reactive species that in turn can couple to DNA bases. Endogenous DNA lesions are genotoxic and induce mutations. The most extensively studied lesion is the formation of 8-OH-dG. This lesion is important because it is relatively easily formed and is mutagenic and therefore is a potential biomarker of carcinogenesis. Mutations that may arise from formation of 8-OH-dG involve GC --> TA transversions. In view of these findings, OFR are considered as an important class of carcinogens. The effect of OFR is balanced by the antioxidant action of non-enzymatic antioxidants as well as antioxidant enzymes. Non-enzymatic antioxidants involve vitamin C, vitamin E, carotenoids (CAR), selenium and others. However, under certain conditions, some antioxidants can also exhibit a pro-oxidant mechanism of action. For example, beta-carotene at high concentration and with increased partial pressure of dioxygen is known to behave as a pro-oxidant. Some concerns have also been raised over the potentially deleterious transition metal ion-mediated (iron, copper) pro-oxidant effect of vitamin C. Clinical studies mapping the effect of preventive antioxidants have shown surprisingly little or no effect on cancer incidence. The epidemiological trials together with in vitro experiments suggest that the optimal approach is to reduce endogenous and exogenous sources of oxidative stress, rather than increase intake of anti-oxidants. In this review, we highlight some major achievements in the study of DNA damage caused by OFR and the role in carcinogenesis played by oxidatively damaged DNA. The protective effect of antioxidants against free radicals is also discussed.
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In the citing paper
“Oxidative stress also leads to considerable DNA damage [74-76] and to the polymerisation and denaturation of proteins [77-79] and proteolipids that can together form insoluble structures typically known as lipofucsin (see e.g. [80,81]) or indeed plaques.”
In the citing paper
“The superoxide radical is considered a primary ROS produced in mitochondria by electron leakage from the electron transport chain to molecular oxygen in the course of oxidative phosphorylation (Valko et al. 2004).”
From Reactive Oxygen Species, Toxicity, Oxidative Stress, and Antioxidants: Chronic Diseases and Aging (2023) · cites this paper as Valko et al. 2004
In the citing paper
“Singlet oxygen has a short half-life, about 10–6 s, depending on the media (Valko et al. 2004).”
From Reactive Oxygen Species, Toxicity, Oxidative Stress, and Antioxidants: Chronic Diseases and Aging (2023) · cites this paper as Valko et al. 2004
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Cited by
Sorted by citations
Free radicals and antioxidants in normal physiological functions and human disease
Valko, M., Leibfritz, D., Moncol, J., Cronin, M. T. D., Mazur, M., & Telser, J. (2007) · The International Journal of Biochemistry & Cell Biology · doi:10.1016/j.biocel.2006.07.001 · Cited by 14,269
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Valko, M., Rhodes, C. J., Moncol, J., Izakovic, M., & Mazur, M. (2006) · Chemico-Biological Interactions · doi:10.1016/j.cbi.2005.12.009 · Cited by 6,680
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Free Radicals, Antioxidants in Disease and Health
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Metadata
- Authors
- Valko, M., Izakovic, M., Mazur, M., Rhodes, C. J., & Telser, J.
- Affiliations
- University of Reading (GB)
- Roosevelt University (US)
- Venue
- Molecular and Cellular Biochemistry
- Published
- 2004-11
- Volume
- 266
- Issue
- 1-2
- Pages
- 37-56
- ISSN
- 0300-8177 (ISSN-L)
- 1573-4919
- OpenAlex
- W2165057232
- Cited by
- 1,820
- References
- 195
- Citations by year
- 2026: 31 · 2025: 43 · 2024: 50 · 2023: 85 · 2022: 80 · 2021: 82 · 2020: 109 · 2019: 108 · 2018: 95 · 2017: 104 · 2016: 96 · 2015: 104 · 2014: 112 · 2013: 123 · 2012: 108
- FWCI
- 32.15
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Molecular and Cellular Biochemistry (publishedVersion)
- PubMed (publishedVersion)
- CentAUR (University of Reading) (acceptedVersion)
- Funders
- Vedecká Grantová Agentúra MŠVVaŠ SR a SAV
- Topics
- Health Sciences › Medicine › Biochemistry (medical) › Antioxidant Activity and Oxidative Stress
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer and biochemical research
- Keywords
- oxygen free radicals, DNA damage, carcinogenesis, 8-oxoguanine, lipid peroxidation, antioxidant enzymes, non-enzymatic antioxidants, vitamin C, beta-carotene, pro-oxidant activity, oxidative stress, G:C to T:A transversions, cancer prevention
- MeSH terms
- Animals, Antioxidants, Cell Transformation, Neoplastic, DNA, DNA Damage, DNA Repair, Free Radicals, Humans, Neoplasms, Oxidation-Reduction, Incidence, Mutagenesis, Reactive Oxygen Species, Oxidative Stress, Lipid Metabolism
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