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Modulation of ethoxyresorufin O-deethylase and glutathione S-transferase activities in Nile tilapia (Oreochromisniloticus) by polycyclic aromatic hydrocarbons containing two to four rings: implications in biomonitoring aquatic pollution

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dc.contributor.author Pathiratne, A. en_US
dc.contributor.author Hemachandra, C.K. en_US
dc.date.accessioned 2014-11-19T04:53:11Z
dc.date.available 2014-11-19T04:53:11Z
dc.date.issued 2010
dc.identifier.citation Ecotoxicology, August 2010, Volume 19, Issue 6, pp 1012-1018
dc.identifier.uri http://link.springer.com/article/10.1007/s10646-010-0482-3
dc.description.abstract Despite ubiquity of polycyclic aromatic hydrocarbons (PAHs) in the tropical environments, little information is available concerning responses of tropical fish to PAHs and associated toxicity. In the present study, effects of five PAHs containing two to four aromatic rings on hepatic CYP1A dependent ethoxyresorufin O-deethylase (EROD), glutathione S-transferase (GST) and serum sorbitol dehydrogenase (SDH) activities in Nile tilapia, a potential fish species for biomonitoring pollution in tropical waters, were evaluated. Results showed that EROD activities were induced by the PAHs containing four aromatic rings (pyrene and chrysene) in a dose dependent manner. However PAHs with two to three aromatic rings (naphthalene, phenanthrene and fluoranthene) caused no effect or inhibition of EROD activities depending on the dose and the duration. Fluoranthene was the most potent inhibitor. SDH results demonstrated that high doses of fluoranthene induced hepatic damage. GST activity was induced by the lowest dose of phenanthrene, fluoranthene and chrysene but high doses had no effect. The results indicate that induction of EROD enzyme in Nile tilapia is a useful biomarker of exposure to PAHs such as pyrene and chrysene. However EROD inhibiting PAHs such as fluoranthene in the natural environment may modulate the EROD inducing potential of other PAHs thereby influencing PAH exposure assessments. en_US
dc.publisher Ecotoxicology en_US
dc.subject Water- pollution;Nile tilapia (Oreochromisniloticus); Polycyclic aromatic hydrocarbons en_US
dc.subject Sri Lanka; Glutathione en_US
dc.subject Sri Lanka en_US
dc.title Modulation of ethoxyresorufin O-deethylase and glutathione S-transferase activities in Nile tilapia (Oreochromisniloticus) by polycyclic aromatic hydrocarbons containing two to four rings: implications in biomonitoring aquatic pollution
dc.type article en_US
dc.identifier.department Fisheries Biology and Aquaculture en_US


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