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Physiological condition status and muscle-based biomarkers in rainbow trout (Oncorhynchus mykiss), after long-term exposure to carbamazepine



Physiological condition status and muscle-based biomarkers in rainbow trout (Oncorhynchus mykiss), after long-term exposure to carbamazepine



Journal of Applied Toxicology 30(3): 197-203



Recently, residual pharmaceuticals are generally recognized as relevant sources of aquatic environmental pollutants. However, the toxicological effects of these contaminants have not been adequately researched. In this study, the chronic toxic effects of carbamazepine (CBZ), an anticonvulsant pharmaceutical commonly present in surface and ground water, on physiological condition status and muscle-based biomarkers of rainbow trout were investigated. Fish were exposed at sublethal concentrations of CBZ (1.0 microg l(-1), 0.2 mg l(-1) and 2.0 mg l(-1)) for 42 days. Compared with the control, there was a significant lower (P < 0.05) condition factor in fish exposed at the highest concentration of CBZ (2.0 mg l(-1)), but the hepatosomatic indices in all groups were not significant changes. At lower CBZ concentration (1.0 microg l(-1), 0.2 mg l(-1)), the antioxidant enzyme activities were induced slightly, except catalase, while at the highest concentration (2.0 mg l(-1)) oxidative stress was apparent as reflected by the significant higher lipid peroxidation and protein carbonyls in the fish muscle, associated with a significant inhibition of antioxidant enzymes activities. Moreover, energy metabolic parameters (RNA-DNA ratio, Na(+)-K(+)-ATPase) were significantly inhibited in muscle of the fish exposed at the highest concentration (2.0 mg l(-1)), compared with the control. In short, CBZ-induced physiological and biochemical responses in fish were reflected in parameters measured in this study, which suggest that these biomarkers could be used as potential indicators for monitoring residual pharmaceuticals present in aquatic environment.

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Accession: 055001557

Download citation: RISBibTeXText

PMID: 19757490

DOI: 10.1002/jat.1482


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