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• W2783081750 endingPage "e0190907" @default.
• W2783081750 startingPage "e0190907" @default.
• W2783081750 abstract "Exposure of mammalian cells to oxidative stress can result in DNA damage that adversely affects many cell processes. Lack of dependable DNA damage reference materials and standardized measurement methods, despite many case-control studies hampers the wider recognition of the link between oxidatively degraded DNA and disease risk. We used bulk electrolysis in an electrochemical system and gas chromatographic mass spectrometric analysis (GC/MS/MS) to control and measure, respectively, the effect of electrochemically produced reactive oxygen species on calf thymus DNA (ct-DNA). DNA was electro-oxidized for 1 h at four fixed oxidizing potentials (E = 0.5 V, 1.0 V, 1.5 V and 2 V (vs Ag/AgCl)) using a high surface area boron-doped diamond (BDD) working electrode (WE) and the resulting DNA damage in the form of oxidatively-modified DNA lesions was measured using GC/MS/MS. We have shown that there are two distinct base lesion formation modes in the explored electrode potential range, corresponding to 0.5 V < E < 1.5 V and E > 1.5 V. Amounts of all four purine lesions were close to a negative control levels up to E = 1.5 V with evidence suggesting higher levels at the lowest potential of this range (E = 0.5 V). A rapid increase in all base lesion yields was measured when ct-DNA was exposed at E = 2 V, the potential at which hydroxyl radicals were efficiently produced by the BDD electrode. The present results demonstrate that controlled potential preparative electrooxidation of double-stranded DNA can be used to purposely increase the levels of oxidatively modified DNA lesions in discrete samples. It is envisioned that these DNA samples may potentially serve as analytical control or quality assurance reference materials for the determination of oxidatively induced DNA damage." @default.
• W2783081750 created "2018-01-26" @default.
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• W2783081750 date "2018-01-11" @default.
• W2783081750 modified "2023-09-29" @default.
• W2783081750 title "Controlled potential electro-oxidation of genomic DNA" @default.
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• W2783081750 doi "https://doi.org/10.1371/journal.pone.0190907" @default.
• W2783081750 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5764341" @default.
• W2783081750 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29324786" @default.
• W2783081750 hasPublicationYear "2018" @default.
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