Journal ArticleDOI
Hydrogen peroxide causes greater oxidation in cellular RNA than in DNA
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TLDR
Human A549 lung epithelial cells were challenged with 18O-labeled hydrogen peroxide and showed slow turnover rates of adducts in RNA and DNA, where guanine in RNA was 14–25 times more common than in DNA.Abstract:
Human A549 lung epithelial cells were challenged with 18O-labeled hydrogen peroxide ([18O]-H2O2), the total RNA and DNA extracted in parallel, and analyzed for 18O-labeled 8-oxo-7,8-dihydroguanosine ([18O]-8-oxoGuo) and 8-oxo-7,8-dihydro-2'-deoxyguanosine ([18O]-8-oxodGuo) respectively, using high-performance liquid chromatography electrospray ionization tandem mass spectrometry (HPLC-MS/MS). [18O]-H2O2 exposure resulted in dose-response formation of both [18O]-8-oxoGuo and [18O]-8-oxodGuo and 18O-labeling of guanine in RNA was 14-25 times more common than in DNA. Kinetics of formation and subsequent removal of oxidized nucleic acids adducts were also monitored up to 24 h. The A549 showed slow turnover rates of adducts in RNA and DNA giving half-lives of approximately 12.5 h for [18O]-8-oxoGuo in RNA and 20.7 h for [18O]-8-oxodGuo in DNA, respectively.read more
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Free Radicals: Properties, Sources, Targets, and Their Implication in Various Diseases
TL;DR: The free radicals induced oxidative stress has been reported to be involved in several diseased conditions such as diabetes mellitus, neurodegenerative disorders, cardiovascular diseases, cardiovascular disease, respiratory diseases, cataract development, rheumatoid arthritis and in various cancers.
Journal ArticleDOI
13 reasons why the brain is susceptible to oxidative stress.
TL;DR: 13 reasons why the brain is susceptible to oxidative stress are rationalised and key reasons include inter alia unsaturated lipid enrichment, mitochondria, calcium, glutamate, modest antioxidant defence, redox active transition metals and neurotransmitter auto-oxidation.
Journal ArticleDOI
Oxidative damage in mild cognitive impairment and early Alzheimer's disease.
TL;DR: Observations suggest that oxidative damage to critical biomolecules occurs early in the pathogenesis of AD and precedes pronounced neuropathologic alterations, and represents a potential therapeutic target for slowing the onset and progression of AD.
Journal ArticleDOI
Ketenes and Other Cumulenes as Reactive Intermediates
Journal ArticleDOI
Oxidized messenger RNA induces translation errors
TL;DR: The results indicate that the SPs were derived from both premature termination of the translation process of the oxidized mRNA and the proteolytic degradation of the modified full-length luciferase resulting from translation errors induced by oxidized RNA.
References
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Book
Free radicals in biology and medicine
TL;DR: 1. Oxygen is a toxic gas - an introduction to oxygen toxicity and reactive species, and the chemistry of free radicals and related 'reactive species'
Journal ArticleDOI
Oxidants, oxidative stress and the biology of ageing.
Toren Finkel,Nikki J. Holbrook +1 more
TL;DR: Evidence that the appropriate and inappropriate production of oxidants, together with the ability of organisms to respond to oxidative stress, is intricately connected to ageing and life span is reviewed.
Journal ArticleDOI
Oxidative damage is the earliest event in Alzheimer disease.
Akihiko Nunomura,George Perry,Gjumrakch Aliev,Keisuke Hirai,Keisuke Hirai,Atsushi Takeda,Elizabeth Balraj,Paul K. Jones,Hossein A. Ghanbari,Takafumi Wataya,Shun Shimohama,Shigeru Chiba,Craig S. Atwood,Robert B. Petersen,Mark A. Smith +14 more
TL;DR: The observations indicate that increased oxidative damage is an early event in AD that decreases with disease progression and lesion formation and suggest that AD is associated with compensatory changes that reduce damage from reactive oxygen.