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Hazard assessment of ingested polystyrene nanoplastics in Drosophila larvae
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Researchers assessed the hazard of ingested polystyrene nanoplastics in Drosophila larvae, examining effects on gut morphology, oxidative stress, and development to characterize toxicological risks of nanoplastic exposure in a model invertebrate organism.
Micro- and nanoplastics (MNPLs) are intentionally produced for commercial uses (primary MNPLs) or are formed from environmentally aged plastics (secondary MNPLs).
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Polystyrene microplastics alter physiological parameters in the Drosophila model
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Researchers investigated the effects of polystyrene micro- and nanoplastics on fruit flies (Drosophila melanogaster) and found dose- and size-dependent toxicity at both larval and adult stages. Exposure caused significant behavioral impairments, elevated markers of cellular stress, and activated key stress response genes, indicating that polystyrene microplastics induce oxidative stress and cellular damage.
Size-dependent and sex-specific negative effects of micro- and nano-sized polystyrene particles in the terrestrial invertebrate model Drosophila melanogaster
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Fruit flies exposed to low doses of polystyrene micro and nanoparticles for 28 days showed tissue damage in their gut, ovaries, and testes, with smaller particles causing more harm. The plastics triggered oxidative stress and cell death in gut tissue, though reproduction was not significantly affected at these doses. This study, using a well-established model organism, suggests that even low-level, long-term exposure to tiny plastic particles can damage internal organs, with potential implications for other species including humans.
Exposure of polystyrene microplastics induces oxidative stress and physiological defects in Drosophila melanogaster
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Researchers used fruit flies as a model organism to study the effects of polystyrene microplastics and found that dietary exposure caused significant oxidative stress at both tested concentrations. The microplastics impaired climbing ability in adult flies and disrupted normal development patterns during the pupal stage. The study suggests that microplastic ingestion can trigger oxidative damage and physiological defects even in relatively simple organisms.
Adverse biological effects of ingested polystyrene microplastics using Drosophila melanogaster as a model in vivo organism
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Researchers used fruit flies as an in vivo model to study the biological effects of ingesting polystyrene microplastics at three different sizes. Exposure caused significant morphological defects, impaired climbing behavior, and genotoxic effects as shown by a somatic mutation test. The findings suggest that polystyrene microplastics may induce genetic damage primarily through somatic recombination, raising concerns about their potential biological impact on living organisms.
Metabolic effects of dietary exposure to polystyrene microplastic and nanoplastic in fruit flies
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Researchers used fruit flies as a model organism to study the metabolic effects of ingesting polystyrene microplastic and nanoplastic particles at environmentally relevant doses. They found that both particle sizes disrupted metabolic processes, with nanoplastics causing more pronounced changes in energy storage and lipid metabolism. The study suggests that dietary exposure to plastic particles, even at levels found in the environment, can meaningfully alter metabolic physiology.
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