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- W1990352052 abstract "In the Eastern English Channel, the potential application of the comet assay and post-labelling technique in dab was evaluated for genotoxicity monitoring of the marine environment. The effects of biotic (age, sex) and abiotic (sampling site and period) factors on the extent of DNA lesions were also studied. Female and male dab of two class of size (juvenile and adult) were collected by trawling in different sites in Seine Bay and Somme Bay during September 2001. Single-strand breaks and adducts were, respectively, measured in erythrocytes and the liver. Results obtained for the adult female were compared with those collected during a first cruise in March 2001 [Akcha et al., Mutat Res. 534 (1–2) (2003) 21]. Significant effects of sex and age were demonstrated on the level of strand breaks. Moreover, a significant interaction between age and sex was shown that might indicate the complex influence of other factors on the extent of DNA damage (i.e. reproduction status). In the adult dab, the level of breaks is higher in the male than in the female, whereas the opposite trend was observed for the juvenile. Whatever the sex, the number of DNA breaks is higher in the adult than in the juvenile. For the female dab, significant differences were observed with the comet assay between the Seine Bay and the Somme Bay in March but not in September. This may be due to seasonal variations in the formation of DNA lesions related to variations in lipid content and levels of biotransformation activities and/or to spawning cycles. The presence of genotoxic substances in the study areas was also confirmed by the detection of DNA adducts in each sample analysed. Whereas no effect was shown on the total level of adducts for the tested biotic and abiotic factors, qualitative differences in adduct profiles were observed for each of these factors. For the female dab, comparison of adduct profiles obtained in March and September with one generated by hepatic microsomal activation in dab of a PAH mixture indicated a PAH contamination of the study areas in autumn. These results show the importance of studying the effects of biotic and abiotic factors on the genotoxic endpoints considered to correctly assess the contribution of chemical contamination to the measured biological responses." @default.
- W1990352052 created "2016-06-24" @default.
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- W1990352052 date "2004-08-01" @default.
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- W1990352052 title "Measurement of DNA adducts and strand breaks in dab (Limanda limanda) collected in the field: effects of biotic (age, sex) and abiotic (sampling site and period) factors on the extent of DNA damage" @default.
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- W1990352052 doi "https://doi.org/10.1016/j.mrfmmm.2004.06.020" @default.
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