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Realistic polyethylene terephthalate nanoplastics and the size- and surface coating-dependent toxicological impacts on zebrafish embryos
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Researchers prepared realistic polyethylene terephthalate nanoplastics and found that both size and surface coating significantly influenced their toxicological impacts on zebrafish embryos, providing an early hazard assessment for PET nanoplastics.
The preparation of realistic polyethylene terephthalate nanoplastics and the preliminary toxicological assessment of the as-prepared PET NPs in zebrafish embryos was carried out.
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Researchers exposed zebrafish embryos to PET plastic micro and nanoparticles at levels found in the environment and observed toxic effects including reduced tail movement, faster heart rates, and changes in eye development. The smaller nanoplastic particles were especially concerning because they are more easily absorbed by developing organisms. These findings suggest that PET plastic pollution in water could harm fish development, raising questions about effects on other species exposed through contaminated water.
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Researchers systematically compared polystyrene and polyethylene micro- and nanoplastics in zebrafish embryos and larvae, finding that nanoplastics caused mortality, impaired hatching, and disrupted swimming behavior at lower concentrations than microplastics, with surface adhesion to embryonic tissues emerging as a likely initiating mechanism for nanoplastic toxicity.
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A mechanistic understanding of the effects of polyethylene terephthalate nanoplastics in the zebrafish (Danio rerio) embryo
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Researchers exposed zebrafish embryos to nanoplastics made from PET, the plastic commonly used in water bottles and food packaging. The nanoplastics accumulated in the liver, intestine, and kidneys, causing oxidative stress, damaging cell energy systems, and disrupting metabolism. This is the first comprehensive study of PET nanoplastic toxicity mechanisms, and it is particularly relevant because PET is one of the most common plastics that humans encounter daily.
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