Toxic effects of copper on antioxidative and metabolic enzymes of the marine gastropod, Onchidium struma.
Arch Environ Contam Toxicol
; 56(4): 776-84, 2009 May.
Article
em En
| MEDLINE
| ID: mdl-19214621
ABSTRACT
The goals of this study were to evaluate the acute and sublethal toxicity of copper (Cu(2+)) on the marine gastropod, Onchidium struma, and to examine the utility of enzymatic parameters as indicators of Cu(2+) exposure. In a semistatic renewal test, the 96-hour median lethal concentration of Cu(2+) for O. struma, 74.80 mg/L, was higher than that for other intertidal species. The activities of the antioxidative enzymes, Cu/Zn superoxide dismutase (Cu/Zn-SOD) and catalase (CAT), and those of the metabolic enzymes-acid phosphatase (ACP), alkaline phosphatase (AKP), glutamic-oxaloacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT) -in both hepatopancreas and muscle were determined after a 1-week exposure to Cu(2+) (range 1.35 to 4.20 mg/L). The activities of both Cu/Zn-SOD and CAT were higher in hepatopancreas than muscle. In addition, there was a negative correlation between Cu(2+) concentration and Cu/Zn-SOD activity in hepatopancreas, whereas a positive correlation was observed for CAT activity. Concentration-dependent changes in ACP and AKP activity showed a similar trend in hepatopancreas, increasing then decreasing and, finally, a slight increase. In contrast, ACP activity was positively correlated with Cu(2+) across the concentration range tested. In both hepatopancreas and muscle, both GOT and GPT were activated by lower concentrations of Cu(2+) and inhibited at higher concentrations.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
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Músculo Esquelético
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Cobre
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Hepatopâncreas
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Enzimas
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Gastrópodes
Limite:
Animals
Idioma:
En
Revista:
Arch Environ Contam Toxicol
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
China