title: Sublethal toxicity of quinalphos on oxidative stress and antioxidant responses in a freshwater fish Cyprinus carpio.
abstract: Extensive use of quinalphos, an organophosphorus pesticide, is likely to reach the aquatic environment and thereby posing a health concern for aquatic organisms. Oxidative stress and antioxidant responses may be good indicators of pesticide contamination in aquatic organisms. The data on quinalphos induced oxidative stress and antioxidant responses in carps are scanty. This study is aimed to assess the two sublethal concentrations of quinalphos (1.09 and 2.18 μL L-1) on oxidative stress and antioxidant responses of Cyprinus carpio for a period of 20 days. In liver, the malondialdehyde level was found to be significantly increased in both the concentrations. The results of the antioxidant parameters obtained show a significant increase in superoxide dismutase, catalase, and glutathione-S-transferase activity in liver of fish. These results demonstrate that environmentally relevant levels of the insecticide quinalphos can cause oxidative damage and increase the antioxidant scavenging capacity in C. carpio. This may reflect the potential role of these parameters as useful biomarkers for the assessment of pesticide contamination. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1399-1406, 2016.
authors.affiliation: Department of Zoology, Unit of Toxicology, School of Life Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
authors.forename: Devan
authors.initials: D
authors.lastname: Hemalatha
authors.affiliation: Department of Zoology, Unit of Toxicology, School of Life Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
authors.forename: Antony
authors.initials: A
authors.lastname: Amala
authors.affiliation: Department of Zoology, Unit of Toxicology, School of Life Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
authors.forename: Basuvannan
authors.initials: B
authors.lastname: Rangasamy
authors.affiliation: Department of Zoology, Unit of Toxicology, School of Life Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
authors.forename: Bojan
authors.initials: B
authors.lastname: Nataraj
authors.affiliation: Department of Zoology, Unit of Toxicology, School of Life Sciences, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India. mathanramesh@yahoo.com.
authors.forename: Mathan
authors.initials: M
authors.lastname: Ramesh
mesh_terms: D000818:Animals; D002347:Carps / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005618:Fresh Water / Q000737:chemistry; D007306:Insecticides / Q000633:toxicity*; D007928:Lethal Dose 50; D008099:Liver / Q000201:enzymology; D008315:Malondialdehyde / Q000378:metabolism; D009946:Organothiophosphorus Compounds / Q000633:toxicity*; D010084:Oxidation-Reduction / Q000187:drug effects; D018384:Oxidative Stress; D013482:Superoxide Dismutase / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D007306:Insecticides; D009946:Organothiophosphorus Compounds; D014874:Water Pollutants, Chemical; C009145:quinalphos; D008315:Malondialdehyde; D002374:Catalase; D013482:Superoxide Dismutase
keywords: Cyprinus carpio; antioxidants; lipid peroxidation; quinalphos; sublethal