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Chemosphere. 2018 Apr;196:182-195. doi: 10.1016/j.chemosphere.2017.12.183. Epub 2017 Dec 29.

Impact of zinc oxide nanoparticles and ocean acidification on antioxidant responses of Mytilus coruscus.

Author information

1
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, China. Electronic address: 841685724@qq.com.
2
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, China.
3
Department of Biological and Environmental Sciences, Sven Lovén Centre for Marine Infrastructure - Kristineberg, University of Gothenburg, Fiskebäckskil, Sweden.
4
Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China. Electronic address: willhuang@sio.org.cn.
5
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China; Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China.
6
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China; Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China; Department of Biological and Environmental Sciences, Sven Lovén Centre for Marine Infrastructure - Kristineberg, University of Gothenburg, Fiskebäckskil, Sweden; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China. Electronic address: yj_wang@shou.edu.cn.

Abstract

Increased production of engineered nanoparticles (NPs) has raised extensive concerns about the potential toxic effects on marine organisms. Extensive evidences documented the impact of ocean acidification (OA) on the physiology and fitness of bivalves. In the present study, we investigated the biochemical responses of the mussel Mytilus coruscus exposed to both nano-ZnO and low pH relevant for ocean acidification conditions for 14 d followed by a 7-d recovery period. Most biochemical indexes (superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), acid phosphatase (ACP) and alkaline phosphatase (ALP)) measured in gills and hemocytes were increased when the mussels were subject to low pH or high concentration of nano-ZnO, suggesting oxidative stress responses. No significant interactions between the two stressors were observed for most measured parameters. After a 1 week recovery period, low pH and nano-ZnO had less marked impact for SOD, GPx, ACP and ALP in hemocytes as compared to the end of the 14 d exposure. However, no recovery was observed in gills. Overall, our results suggest that both low pH and nano-ZnO induce an anti-oxidative response in Mytilus coruscus with gills being more sensitive than hemocytes.

KEYWORDS:

Antioxidant response; Gill; Hemocyte; Mytilus coruscus; Nano-ZnO; pH

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