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Oxidative stress induced by nanoplastics in the liver of juvenile large yellow croaker Larimichthys crocea
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Researchers exposed juvenile large yellow croaker fish to nanoplastics for 14 days followed by a 7-day recovery period and measured signs of oxidative stress in their livers. They found that antioxidant enzyme activity and lipid damage markers increased significantly at higher nanoplastic concentrations, and some effects persisted even after the recovery period. The study suggests that nanoplastic exposure may reduce fish survival rates and could have broader implications for fishery productivity.
There are many toxicological studies on microplastics, but little is known about the effect of nanoplastics (NPs). Here, we evaluated the oxidative stress responses induced by NPs (10, 10 and 10 particles/l) in juvenile Larimichthys crocea during 14-d NPs exposure followed by a 7-d recovery. After exposure, the activities of antioxidant enzymes (SOD, CAT, GPx) and MDA levels increased in the liver of fish at the highest NPs concentration. SOD and CAT activities remained elevated above the baseline after recovery under high-concentration NPs but returned to the baseline in two other NP treatments. Although lipid peroxidation in liver was reversible, juvenile fish in NPs treatments exhibited a lower survival rate than the control during both exposure and recovery. Furthermore, IBR value and PCA analysis showed the potential adverse effects of NPs. Considering that NPs can reduce the survival of fish juveniles, impacts of NPs on fishery productivity should be considered.
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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.
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.
Antioxidants and molecular damage in Nile Tilapia (Oreochromis niloticus) after exposure to microplastics
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Researchers exposed juvenile Nile Tilapia to different concentrations of microplastics for 15 days followed by a recovery period. The study found dose-dependent increases in oxidative stress markers, DNA fragmentation, and altered protein patterns in fish exposed to microplastics. Evidence indicates that while fish exposed to the lowest concentration recovered after the treatment ended, higher doses caused more persistent damage.
Effects of Polystyrene Nanoplastics on Oxidative Stress, Blood Biochemistry, and Digestive Enzyme Activity in Goldfish (Carassius auratus)
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Goldfish exposed to polystyrene nanoplastics in their diet for 21 days showed significant oxidative stress, disrupted blood chemistry, and reduced digestive enzyme activity, with effects worsening at higher doses. The smallest nanoplastics caused the most damage to the fishes' antioxidant defense systems and overall health. These findings add to the evidence that nanoplastics in aquatic environments can harm fish health in ways that may affect the safety of fish consumed by humans.
Nanoplastic Exposure at Environmental Concentrations Disrupts Hepatic Lipid Metabolism through Oxidative Stress Induction and Endoplasmic Reticulum Homeostasis Perturbation
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A study in fish found that nanoplastics at environmentally realistic concentrations accumulated in the liver and disrupted fat metabolism, causing a condition similar to fatty liver disease. Smaller nanoplastics (100 nanometers) caused more severe damage than larger microplastics by disrupting protein processing in cells and triggering oxidative stress. These findings raise concerns that nanoplastics in the environment could affect liver health in fish and potentially in humans who consume contaminated seafood.
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