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• W1973485652 startingPage "199" @default.
• W1973485652 abstract "Recently, we were able to show that nitrogen dioxide (NO2), a strong oxidant, induced DNA single strand breaks (SSBs) in V79 cells. Possibly, special scavengers, e.g. antioxidative vitamins, may protect cells from NO2-induced damage. Therefore, the effect of various tocopherols, beta-carotene, retinol, and ascorbic acid on NO2-induced SSBs in V79 cells was investigated. Cells were preincubated with vitamins and treated for 10 min with 200 ppm NO2. The rate of SSBs was measured by the alkaline elution assay, the amount of DNA by a fluorimetric assay. Micromolar concentrations of d-gamma-tocopherol inhibited the rate of NO2-induced SSBs by 40%, beta-carotene and ascorbic acid by 25%. None of these vitamins had any effects on DNA or the viability of cells. When incubating the cells with retinol in a medium with pH 8.5, this vitamin inhibited NO2-induced SSBs, reducing them by 35%. However, in high concentrations, retinol itself induced SSBs and influenced cell viability. The results are discussed with regard to many toxic effects of NO2." @default.
• W1973485652 created "2016-06-24" @default.
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• W1973485652 date "1993-03-01" @default.
• W1973485652 modified "2023-10-17" @default.
• W1973485652 title "NO2-induced DNA single strand breaks are inhibited by antioxidative vitamins in V79 cells" @default.
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• W1973485652 doi "https://doi.org/10.1016/0009-2797(93)90098-j" @default.
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• W1973485652 hasPublicationYear "1993" @default.
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