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New insights into the impact of polystyrene micro/nanoplastics on the nutritional quality of marine jacopever (Sebastes schlegelii)
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Researchers investigated how polystyrene micro- and nanoplastics affect the nutritional quality of marine jacopever fish (Sebastes schlegelii), finding that nanoplastics reduced nutritional quality more severely than microplastics. Despite no notable impact on intestinal microbiota function, both particle types impaired lipid and protein metabolism pathways.
Microplastics (MPs) and nanoplastics (NPs) are ubiquitous in the marine environments due to the wide use and mismanagement of plastics. However, the effect of MPs/NPs on the nutrition quality of economic species is poorly understood, and their underlying mechanisms remained unclear. We therefore investigated the impacts of polystyrene MPs/NPs on the nutrition composition of marine jacopever Sebastes schlegelii from the perspective of assimilation and metabolism. Results showed that NPs reduced more nutrition quality than MPs. Despite no notable impact on intestinal microbiota function, MPs/NPs influenced the assimilation of fish through intestinal damage. Furthermore, NPs induced greater damage to hepatocyte metabolism than MPs, caused by hepatocyte uptake through membrane protein pumps/channels and clathrin/caveolin-mediated endocytosis for NPs, while through phagocytosis/pinocytosis for MPs. NPs triggered more cell apoptosis signals in Ferroptosis and FoxO signaling pathways than MPs, destroying mitochondria structure. Compared with MP treatments, a significant upregulation of genes (PRODH and SLC25A25A) associated with the electron transfer chain of mitochondria was detected in the NP treatments, influencing the tricarboxylic acid cycle and interfering with liver metabolism of proteins, fatty acid, glycerol phospholipids, and carbohydrates. This work provides new insights into the potential impacts of MPs/NPs on the quality and safety of seafood.
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Dietary polystyrene nanoplastics exposure alters liver lipid metabolism and muscle nutritional quality in carnivorous marine fish large yellow croaker (Larimichthys crocea)
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Researchers fed polystyrene nanoplastics to large yellow croaker fish for 21 days and found that the particles accumulated in liver cells and disrupted lipid metabolism. The nanoplastics caused excessive fat buildup in the liver and altered the fatty acid composition and texture of fish muscle tissue. The study suggests that nanoplastic contamination in seafood could affect both fish health and the nutritional quality of fish consumed by humans.
Polystyrene microplastics alter the behavior, energy reserve and nutritional composition of marine jacopever (Sebastes schlegelii)
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Researchers exposed juvenile jacopever fish to polystyrene microplastics and observed significant changes in feeding behavior, swimming activity, and energy reserves. The fish took longer to find food, moved less, and showed reduced levels of stored energy and altered nutritional composition in their tissues. The study suggests that microplastic exposure can impair the basic survival behaviors and overall fitness of marine fish.
Nanoplastics impair the intestinal health of the juvenile large yellow croaker Larimichthys crocea
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Researchers exposed juvenile large yellow croaker fish to nano-sized polystyrene particles to assess impacts on intestinal health and growth. The study found that nanoplastics accumulated in the fish and caused disorders in digestion, antioxidant defenses, immune function, and intestinal microflora, indicating that nanoplastics can significantly impair gut health in commercially important marine fish species.
Polystyrene nanoplastics affected the nutritional quality of Chlamys farreri through disturbing the function of gills and physiological metabolism: Comparison with microplastics
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Researchers exposed scallops to polystyrene microplastics and nanoplastics at environmentally realistic levels and found that both sizes reduced the protein content and overall quality of the edible muscle. Nanoplastics caused more damage than microplastics, disrupting gill function, metabolism, and triggering oxidative stress through mitochondrial damage pathways. This study shows that plastic pollution could reduce the nutritional value of commercially harvested shellfish that people eat.
Polystyrene microplastics induce gut microbiome and metabolome changes in Javanese medaka fish (Oryzias javanicus Bleeker, 1854)
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Researchers found that polystyrene microplastic exposure altered gut microbiome composition and metabolic profiles in Javanese medaka fish, with effects on amino acid and lipid metabolism pathways suggesting microplastics can disrupt gut health in aquatic organisms.
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