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Abstract
The ability of benzo[a]pyrene, Aroclor 1254, 2-3-7-8-tetrachlorodibenzo-p-dioxin and β-naphthoflavone to induce DNA strand breaks (SB) and apoptosis in erythrocytes of the European eel (Anguilla anguilla) was investigated following by in vivo exposure. DNA damage was evaluated by the Comet assay, while the diffusion assay was used to investigate the induction of apoptosis 7 days after a single intraperitoneal administration. 2-3-7-8-Tetrachlorodibenzo-p-dioxin induced the highest genotoxic effect, followed by benzo[a]pyrene, while the other two substances had limited effects. A significant induction of apoptosis was observed at the highest doses after exposure to benzo[a]pyrene, when DNA damage was also elevated. The occurrence of apoptotic cells after exposure to Aroclor, 2-3-7-8-tetrachlorodibenzo-p-dioxin and β-naphthoflavone was quite variable and did not show clear dose-related responses. The role of oxidative stress in mediating DNA damage was also discussed.
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