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Influence of microplastics on triclosan bioaccumulation and metabolomics variation in Tilapia fish tissues
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Researchers found that polystyrene microplastics significantly altered triclosan bioaccumulation and metabolomic profiles in tilapia tissues, with the gut showing the highest triclosan concentrations and the liver exhibiting the most disrupted metabolic pathways after co-exposure.
Microplastics (MPs) and chemical pollutants usually coexist in aquatic environments. The bioaccumulation and metabolism of pollutants in aquatic organisms can be influenced by MPs. In this study, the bioaccumulation of triclosan (TCS) in tilapia tissues was determined, and metabolomics in the liver, gills, and gut were investigated after 10-day exposure to micro-sized polystyrene (PS) and TCS in water. The results showed that TCS bioaccumulated in various tissues, with the highest average concentration of 2728 ± 577 ng g in the gut. The log bioaccumulation factors (BAFs) for TCS in these tissues were in the range of 0.99-3.56. Compared to the TCS treatment alone, MPs showed enhancement on the bioaccumulation of TCS in tilapia skin, liver, gut, gills, and stomach tissues in the TCS plus MP exposure. Especially in the skin and liver, the TCS concentrations were up to 2.06 and 1.38 times higher in the co-exposure of TCS and MPs, respectively. Based on the metabolomic analysis, MPs mainly disturbed the lipid and energy metabolism in tilapia fish. The altered metabolites between treatment with TCS alone and TCS + MPs were consistent, indicating that TCS has stronger disturbance in lipid and energy metabolism than MPs. This implies that the metabolism influence by the mixture of MPs and compounds is complicated in fish tissues.
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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.
Transcriptome sequencing and metabolite analysis reveal the toxic effects of nanoplastics on tilapia after exposure to polystyrene
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Researchers exposed larval tilapia to polystyrene nanoplastics and then analyzed changes in gene expression and metabolic profiles after a recovery period. They found that nanoplastic exposure disrupted immune-related pathways, energy metabolism, and lipid processing in the fish, with some effects persisting even after exposure ended. The study suggests that nanoplastics can cause lasting metabolic and immune disruptions in freshwater fish.
Accumulation of polystyrene nanoplastics and triclosan by a model tooth-carp fish, Aphaniops hormuzensis (Teleostei: Aphaniidae)
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Researchers found that polystyrene nanoplastics accumulate in both digestive and non-digestive organs of the tooth-carp fish Aphaniops hormuzensis, with highest concentrations in the gut, liver, and gills, and that co-exposure with triclosan altered the bioaccumulation patterns of both contaminants.
Interactive effects of polystyrene microplastics and roxithromycin on bioaccumulation and biochemical status in the freshwater fish red tilapia (Oreochromis niloticus)
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Researchers investigated the combined effects of polystyrene microplastics and the antibiotic roxithromycin on red tilapia and found that microplastics enhanced the bioaccumulation of the drug in fish tissues. The co-exposure also produced greater biochemical disruption than either contaminant alone, suggesting microplastics may act as carriers that increase pharmaceutical uptake in freshwater fish.
Chronic Exposure of Adult Zebrafish to Polyethylene and Polyester-based Microplastics: Metabolomic and Gut Microbiome Alterations Reflecting Dysbiosis and Resilience
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Researchers exposed adult zebrafish to polyethylene and polyester microplastics at environmentally relevant concentrations and found significant disruptions to metabolic pathways and gut microbiome composition. Polyethylene primarily affected cell membrane compounds and inflammation-related metabolites, while polyester altered lipid metabolism and gut bacterial interactions. The study reveals that chronic microplastic exposure can cause subtle but meaningful shifts in fish metabolism and gut health, even at low concentrations.
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