Cited by 216Carcinogens and Genotoxicity AssessmentDNA Repair MechanismsRedox biology and oxidative stress

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Identification of Possible Reactive Oxygen Species Involved in Ultraviolet Radiation-Induced Oxidative DNA Damage

Zhang, Xueshu, Rosenstein, Barry S, Wang, Yan, Lebwohl, Mark, Wei, Huachen·1997·Free Radical Biology and Medicine

Abstract

We have previously demonstrated that each region of the ultraviolet (UV) spectrum (UVA, UVB, and UVC) induces the formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo) in purified calf thymus DNA and HeLa cells in a fluence-dependent manner. In the present study, we further characterize the possible reactive oxygen species (ROS) that are involved in the induction of 8-oxodGuo by UV radiation. Sodium azide, a singlet oxygen (1O2) scavenger though its quenching effect on HO. was also reported, inhibited 8-oxodGuo production in calf thymus DNA exposed to UVA, UVB, or UVC in a concentration-dependent fashion with maximal quenching effect of over 90% at a concentration of 10 mM. Catalase, at a concentration of 50 U/ml, reduced the yields of UVA- and UVB-induced 8-oxodGuo formation by approximately 50%, but had little effect on UVC-induced 8-oxodGuo production. In contrast, 50 U/ml of superoxide dismutase (SOD) did not affect induction of 8-oxodGuo by any portion of the UV spectrum. Hydroxyl radical (HO.) scavengers mannitol and dimethylsulfoxide (DMSO) moderately reduced the levels of 8-oxodGuo induced by UVA and UVB, but not those by UVC. Instead, mannitol and DMSO enhanced the formation of 8-oxodGuo induced by UVC. These results suggest that certain types of ROS are involved in UV-induced 8-oxodGuo formation with 1O2 playing the predominant role throughout the UV spectrum. Except for UVC, other ROS such as hydrogen peroxide (H2O2) and HO. may also be involved in UVA- and…

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Research works printed but not linked: 34

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Metadata

Authors
Zhang, X., Rosenstein, B. S., Wang, Y., Lebwohl, M., & Wei, H.
Affiliations
City University of New York (US)
Corresponding author
Wei, Huachen
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
1997-01
Volume
23
Issue
7
Pages
980-985
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2089811590
Cited by
216
References
0
Citations by year
2026: 3 · 2025: 6 · 2024: 5 · 2023: 9 · 2022: 8 · 2021: 10 · 2020: 5 · 2019: 11 · 2018: 7 · 2017: 3 · 2016: 7 · 2015: 8 · 2014: 13 · 2013: 9 · 2012: 10
FWCI
2.93
Type
journal article
Language
en
Open access
closed
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (7r01ca060994-03, 5r01ca061764-04)
  • National Cancer Institute (CA61764, CA60994)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
reactive oxygen species, ultraviolet radiation, oxidative DNA damage, 8-oxo-7,8-dihydro-2'-deoxyguanosine, singlet oxygen, hydroxyl radicals, hydrogen peroxide, superoxide, UVA, UV-B radiation, UV-C, sodium azide, catalase, superoxide dismutase, calf thymus DNA, HeLa cells
MeSH terms
Catalase, Dimethyl Sulfoxide, DNA Damage, Mannitol, Superoxide Dismutase, Ultraviolet Rays, Free Radical Scavengers, Reactive Oxygen Species, Oxidative Stress, Sodium Azide

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