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- W1975279351 abstract "While arsenic has been classified as a Group 1 human carcinogen by the International Agency for Research on Cancer (IARC), its mutagenicity has not been fully characterized in experimental animals. The aim of this study was to assess the in vivo mutagenicity of arsenite in C57BL/6J gpt delta mice. Male gpt delta mice were given drinking water containing sodium arsenite for 3 weeks, and the hepatic genome was assayed for mutations 2 weeks later. The gpt mutation assays showed a significant increase in mutation frequency in the liver following arsenite exposure. Sequence analysis revealed that 67% of mutations detected are G:C to A:T transitions and 5% are G:C to T:A transversions in the control group, and arsenite exposure resulted in a markedly higher rate of G:C to T:A transversions (46% of mutations detected). G:C to T:A transversions have been reported to be induced following formation of 8-hydroxy-2'-deoxyguanosine (8-OHdG), a representative product that results from oxidative DNA damage. We also detected a significant increase in 8-OHdG in the livers of the mice exposed to arsenite. These results demonstrate that arsenite has mutagenicity in vivo and suggest that arsenite induces G:C to T:A transversions through oxidative-stress-induced 8-OHdG formation." @default.
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- W1975279351 date "2014-01-01" @default.
- W1975279351 modified "2023-10-16" @default.
- W1975279351 title "In vivo mutagenicity of arsenite in the livers of gpt delta transgenic mice" @default.
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- W1975279351 doi "https://doi.org/10.1016/j.mrgentox.2013.12.001" @default.
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