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The “Trojan Horse” effect of nanoplastics: potentiation of polycyclic aromatic hydrocarbon uptake in rainbow trout and the mitigating effects of natural organic matter
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This study investigated the 'Trojan Horse' effect of nanoplastics, examining whether nanoplastic particles potentiate the toxicity of co-sorbed polycyclic aromatic hydrocarbons by facilitating their uptake and cellular delivery in aquatic organisms.
Massive annual production of plastics worldwide, coupled with prolonged environmental degradation and poor recycling policies has resulted in serious concerns regarding the ecological impact of these materials.
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Potentiation of polycyclic aromatic hydrocarbon uptake in zebrafish embryos by nanoplastics
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Nanoplastics present in the environment were found to enhance the uptake of polycyclic aromatic hydrocarbons (PAHs) in zebrafish embryos, suggesting that plastic particles can act as a "Trojan horse" that increases exposure to other toxic pollutants. This combined toxicity effect raises important concerns about the true health risks of microplastic contamination.
Joint effect of nanoplastics and humic acid on the uptake of PAHs for Daphnia magna: A model study
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This study examined how humic acid (a form of dissolved organic matter) modifies the bioaccumulation of polycyclic aromatic hydrocarbons in aquatic organisms exposed to nanoplastics, finding that humic acid significantly altered the joint effects of the two complex matrices. The results indicate that natural organic matter plays an important role in regulating nanoplastic-associated chemical uptake.
PAH Sorption to Nanoplastics and the Trojan Horse Effect as Drivers of Mitochondrial Toxicity and PAH Localization in Zebrafish
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Researchers investigated whether nanoplastics act as a 'Trojan Horse' carrying adsorbed polycyclic aromatic hydrocarbons (PAHs) into zebrafish cells, finding that nanoplastic-bound PAHs accumulated in mitochondria and caused greater mitochondrial toxicity than free PAHs alone.
Bioavailability of micro/nanoplastics and their associated polycyclic aromatic hydrocarbons to Daphnia Magna: Role of ingestion and egestion of plastics
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Using a passive dosing system that kept dissolved pollutant concentrations constant, researchers showed that microplastics and nanoplastics dramatically increase the toxicity of polycyclic aromatic hydrocarbons (PAHs) to the water flea Daphnia magna: immobilization reached 71-80% when MPs/NPs and PAHs were combined, compared to 24% for PAHs alone. The PAHs adsorbed onto microplastic surfaces were bioavailable and contributed 37-50% of the total toxic effect, acting as a vector that delivers concentrated doses of carcinogenic compounds to organisms that ingest the particles. These findings reveal that the true hazard of microplastics in polluted water is substantially greater than either the particles or the chemical contaminants would cause on their own.
Different partition of polycyclic aromatic hydrocarbon on environmental particulates in freshwater: Microplastics in comparison to natural sediment
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This study investigated how the polycyclic aromatic hydrocarbon phenanthrene partitions between water and three common plastic types, finding that polymer composition strongly influences sorption behavior. The results help explain how microplastics act as vectors for toxic organic compounds in aquatic environments.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.