Antioxidant and detoxification responses of oysters Crassostrea hongkongensis in a multimetal-contaminated estuary

Xuan Liu; Wen-Xiong Wang

doi:10.1002/etc.3455

journal article Apr 12, 2016

Antioxidant and detoxification responses of oysters Crassostrea hongkongensis in a multimetal-contaminated estuary

Xuan Liu

Wen-Xiong Wang

Environmental Toxicology and Chemistry Vol. 35 No. 11 pp. 2798-2805 · Oxford University Press (OUP)

View at Publisher Save 10.1002/etc.3455

Abstract

Abstract

The contaminated oysters discovered in the Pearl River Estuary (Guangdong province, China) contained high levels of metals in their tissues, especially Cu and Zn, indicating that this large and densely urbanized estuary in Southern China suffers from serious metal pollution. The present study aimed to investigate the impacts of multimetal pollution in the Pearl River Estuary on oyster antioxidant and detoxification systems. The responses of various biochemical biomarkers in the ecologically important oyster Crassostrea hongkongensis collected from 7 sites in the Pearl River Estuary were quantified. Significant correlations were demonstrated between the accumulation of Cu and Zn and oxidative stress (lipid peroxidation) and oxidative stress defenses (catalase, glutathione peroxidase) in the oyster gills. Significant correlations between the accumulation of Cd and Cu and detoxification (glutathione and glutathione transferase) in the gills were also documented. Interestingly, metallothionein concentrations were positively correlated with Cd, but negatively correlated with Cu, Ni, and Zn concentrations in the gills. These measurements indicated that Cu in the Pearl River Estuary induced various biochemical responses in the oysters and influenced the susceptibility of oysters to environmental stress. The present study has provided the first evidence of antioxidant and detoxification responses in native contaminated oysters from a field environment seriously contaminated by metals. Coupling biomarkers with tissue metal concentration measurements was a promising approach to identify the metals causing biological impacts in a multimetal-contaminated estuary. Environ Toxicol Chem 2016;35:2798–2805. © 2016 SETAC

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Details

Published: Apr 12, 2016
Vol/Issue: 35(11)
Pages: 2798-2805
License: View

Authors

X

Xuan Liu

Division of Life ScienceThe Hong Kong University of Science and Technology Clearwater Bay Kowloon Hong Kong

W

Wen-Xiong Wang

Shenzhen Research InstituteThe Hong Kong University of Science and Technology Shenzhen China; Division of Life ScienceThe Hong Kong University of Science and Technology Clearwater Bay Kowloon Hong Kong

Funding

National Natural Science Foundation of China Award: 21237004

National Natural Science Foundation Award: 21237004

Hong Kong Research Grants Council Award: 662813

Cite This Article

Xuan Liu, Wen-Xiong Wang (2016). Antioxidant and detoxification responses of oysters Crassostrea hongkongensis in a multimetal-contaminated estuary. Environmental Toxicology and Chemistry, 35(11), 2798-2805. https://doi.org/10.1002/etc.3455

Antioxidant and detoxification responses of oysters Crassostrea hongkongensis in a multimetal-contaminated estuary

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