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• W1983850081 abstract "Although benzo[a]pyrene (B[a]P) is a well-known genotoxic agent, little is known about the extent of DNA effects induced by B[a]P in rat tissues after pulmonary exposure. The alkaline single-cell gel electrophoresis (comet assay) was used to measure DNA single-strand breaks in alveolar macrophages, lung cells, peripheral lymphocytes and hepatocytes of OFA Sprague-Dawley rats exposed to a single dose of B[a]P by endotracheal administration. Statistically significant damage was observed in all organs tested after 3, 24 and 48h of pulmonary exposure to 3mg of B[a]P per animal, with a time-dependent relationship. The maximum damage was observed in the four cell types 24h after exposure. The higher level of damage was observed both in lung cells and peripheral lymphocytes; in alveolar macrophages and hepatocytes the level of damage was increased, but at a lower level than in the two other cell types. Furthermore, B[a]P demonstrated a clear dose-related genotoxic activity in the lung cells when tested at doses of 0.75, 1.5 and 3mg. The current study shows that B[a]P caused DNA single-strand breaks in the respiratory tract of endotracheally treated OFA Sprague-Dawley rats. The study also suggests that pulmonary exposure to B[a]P can induce a high level of DNA damage in peripheral lymphocytes. The clear relationship between lung exposure to B[a]P and consequences observed in lymphocytes suggests that the comet assay in peripheral lymphocytes can be used as a sensitive marker in human monitoring studies." @default.
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• W1983850081 date "2003-01-01" @default.
• W1983850081 modified "2023-09-29" @default.
• W1983850081 title "Assessment of genotoxic effect of benzo[a]pyrene in endotracheally treated rat using the comet assay" @default.
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• W1983850081 doi "https://doi.org/10.1016/s1383-5718(02)00252-8" @default.
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