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Tissue accumulation of polystyrene microplastics causes oxidative stress, hepatopancreatic injury and metabolome alterations in Litopenaeus vannamei
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Researchers found that polystyrene microplastics accumulated in shrimp organs, especially the liver-like hepatopancreas, causing growth problems, abnormal swimming, and oxidative stress. Higher microplastic concentrations led to greater tissue damage and disrupted key metabolic pathways including sugar, fat, and amino acid processing. The study expands our understanding of how microplastics affect commercially important seafood species.
Microplastics (MPs) pose one of the major environmental threats to marine organisms and ecosystems on a global scale. Although many marine crustaceans are highly susceptible to MPs pollution, the toxicological effects and mechanisms of MPs on crustaceans are poorly understood. The current study focused on the impacts of MPs accumulation in shrimp Litopenaeus vannamei at the behavioral, histological and biochemical levels. The results demonstrated the accumulation of polystyrene MPs in various organs of L. vannamei, with highest MPs abundance in the hepatopancreas. The MPs accumulated in shrimp caused growth inhibition, abnormal swimming behavior and reduced swimming performance of L. vannamei. Following MPs exposure, oxidative stress and lipid peroxidation were also observed, which were strongly linked to attenuated swimming activity of L. vannamei. The above MPs-induced disruption in balance of antioxidant system triggered the hepatopancreatic damage in L. vannamei, which was exacerbated with increasing MPs concentrations (from 0.02 to 1 mg L-1). Furthermore, metabolomics revealed that MPs exposure resulted in alterations of metabolic profiles and disturbed glycolysis, lipolysis and amino acid metabolism pathways in hepatopancreas of L. vannamei. This work confirms and expands the knowledge on the sublethal impacts and toxic modes of action of MPs in L. vannamei.
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Oxidative effects of consuming microplastics in different tissues of white shrimp Litopenaeus vannamei
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Researchers fed white shrimp diets containing polystyrene microplastics and found the particles accumulated in gills, muscles, and the hepatopancreas. The microplastics triggered oxidative stress, DNA damage, and lipid damage in multiple tissues, along with visible tissue abnormalities including edema and immune cell infiltration. The study demonstrates that dietary microplastic exposure can cause widespread oxidative harm across different organ systems in commercially important shellfish.
Polystyrene nanoplastics induce lipid metabolism disorder and alter fatty acid composition in the hepatopancreas of Pacific whiteleg shrimp (Litopenaeus vannamei)
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Researchers exposed Pacific whiteleg shrimp to different concentrations of polystyrene nanoplastics for 28 days and found significant disruption to fat metabolism in the shrimp's digestive organ. Higher concentrations caused tissue damage, reduced protein and fat content, and altered the activity of enzymes that control how the body processes fats. Since shrimp is a widely consumed seafood, these findings raise questions about how nanoplastic contamination in aquaculture could affect the nutritional quality and safety of shellfish for human consumption.
Effect of polyethylene microplastics on oxidative stress and histopathology damages in Litopenaeus vannamei
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Researchers injected fluorescent polyethylene microspheres into Pacific white shrimp (Litopenaeus vannamei) and found that microplastic exposure increased oxidative stress markers and caused histopathological damage to hepatopancreas and gill tissue, even at relatively low concentrations.
Accumulation and damage of polyethylene-microplastics to the digestive system of juvenile Litopenaeus vannamei shrimp exposed through feed
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Researchers fed juvenile Pacific white shrimp diets containing polyethylene microplastics at varying concentrations for 28 days. While survival and growth were not affected, microplastics accumulated in the digestive system and caused tissue damage to the hepatopancreas and intestine, suggesting that even without visible growth effects, microplastic ingestion can cause internal harm to commercially important crustacean species.
Accumulation of polystyrene microplastics in juvenile Eriocheir sinensis and oxidative stress effects in the liver
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Researchers exposed juvenile Chinese mitten crabs to polystyrene microplastics and found that the particles accumulated in gill, liver, and gut tissues, causing oxidative stress in the liver. Higher microplastic concentrations reduced growth rates and caused measurable changes in liver enzyme activity. The study provides evidence that microplastic pollution can impair the growth and liver health of commercially important crustacean species.
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