Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 829, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.154586
Keywords
Eriocheir sinensis; Microplastics; Heavy metal; Antioxidant enzyme; Lipid anabolism; Bioaccumulation
Categories
Funding
- National Key Research and Develop-ment Program of China [2018YFD0900603]
- National Natural Sci-ence Foundation of China [31472287]
- China Agricultural Research System [19DZ2284300]
- capacity promoting Project of Shanghai Engi-neering and Technology Center from Shanghai Municipal Science and Technology Commission [48]
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The combination of microplastics and lead exposure had a more severe impact on the bioaccumulation of lead, oxidative stress, lipid metabolism, and liver injury in Chinese mitten crabs. This study provides insights into the response of economic crustaceans to the combined stress of lead and microplastics.
Microplastics may be potential vectors for environmental contaminants such as heavy metals in the aquatic ecosystem due to their highly hydrophobic surfaces and fugacity property. To investigate the combined effects of microplastics with Pb, we exposed juvenile Chinese mitten crabs Eriocheir sinensis to different Pb concentrations (0, 5 and 50 mu g/L) combined with microplastics (0 and 400 mu g/L) for 21 days to determine the Pb bioaccumulation, oxidative stress, lipid anabolism, and histopathology of hepatopancreas. In general, the results showed that compared to single Pb exposure, the combination of MPs and Pb significantly increased the bioaccumulation of Pb, activities/content of antioxidant biomarkers and lipid metabolism enzymes, and liver injury parameters in crabs, indicating MPs are potential vector of heavy metals and co-exposure exerts more severe effects on crabs. This study provides the insights into the oxidative defense and preliminary lipid anabolism of economic crustaceans in response to combined stress of Pb and MPs.
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