title: Toxic effects upon exposure to polycyclic aromatic hydrocarbon (chrysene) in scallop Chlamys farreri during the reproduction period.
abstract: This study aims to investigate potential toxic effects of chrysene (CHR) on mature scallop Chlamys farreri during the reproduction period, using indicators of antioxidant defences and oxidative stress. Scallops were exposed to 0.2, 0.8 and 3.2μg/L waterborne CHR for 21 days, at day 10 scallops were induced to spawn. At days 1, 3, 6, 10, 11, 15 and 21, aryl hydrocarbon hydroxylase (AHH), 7-ethoxyresorufin-O-deethylase (EROD), glutathione-s-transferase (GST), glutathione (GSH), superoxide dismutase (SOD), lipid peroxidation (LPO), protein carbonyl (PC) and DNA strand breaks in digestive glands were examined by separately analysing male and female scallops. During the pre-spawn period, Levels of enzymatic activities and oxidative stress were all induced by the exposure to CHR for females and males. GST activity presented a good time- and dose-dependent relationship only in males, and GSH content showed a dose-dependent manner in both sexes. During the post-spawn period, different trends were observed, while PC contents maintained growth in time- and dose-dependent manner. Overall, males were more sensitive than females to CHR exposure in enzyme activities, and correspondingly, females suffered from more serious oxidative damages. Both GSH and PC contents seemed to be potential biomarkers for PAH exposure. These results will offer the information on toxicity of CHR in this species, and ensure the influence of gender and reproductive status on PAH detoxification metabolism.
authors.affiliation: The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China.
authors.forename: Meng
authors.initials: M
authors.lastname: Xiu
authors.affiliation: The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China. Electronic address: panlq@ouc.edu.cn.
authors.forename: Luqing
authors.initials: L
authors.lastname: Pan
authors.affiliation: The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Jin
mesh_terms: D000818:Animals; D002911:Chrysenes / Q000633:toxicity*; D019363:Cytochrome P-450 CYP1A1 / Q000378:metabolism; D004249:DNA Damage; D004064:Digestive System / Q000187:drug effects / Q000378:metabolism; D005260:Female; D005978:Glutathione / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D049897:Pectinidae / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology; D050050:Protein Carbonylation / Q000187:drug effects; D012098:Reproduction / Q000187:drug effects; D013482:Superoxide Dismutase / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D002911:Chrysenes; D014874:Water Pollutants, Chemical; C031180:chrysene; D019363:Cytochrome P-450 CYP1A1; D013482:Superoxide Dismutase; D005982:Glutathione Transferase; D005978:Glutathione
keywords: Antioxidant enzymes; Biomarker; Chlamys farreri; Chrysene; Oxidative stress