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Impact of Polyethylene Terephthalate Microplastics on Drosophila melanogaster Biological Profiles and Heat Shock Protein Levels
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Scientists exposed fruit flies to PET microplastics and found severe cell damage in the gut, reproductive organs, and reduced fertility. The microplastics caused oxidative stress and triggered stress-response genes, with one gene (hsp83) identified as an early warning biomarker for microplastic toxicity. These findings in a well-studied model organism suggest that PET microplastics, commonly found in food and water, could pose risks to both gut health and reproductive function.
Microplastics and nanoplastics are abundant in the environment. Further research is necessary to examine the consequences of microplastic contamination on living species, given its widespread presence. In our research, we determined the toxic effects of PET microplastics on Drosophila melanogaster at the cellular and genetic levels. Our study revealed severe cytotoxicity in the midgut of larvae and the induction of oxidative stress after 24 and 48 h of treatment, as indicated by the total protein, Cu-Zn SOD, CAT, and MDA contents. For the first time, cell damage in the reproductive parts of the ovaries of female flies, as well as in the accessory glands and testes of male flies, has been observed. Furthermore, a decline in reproductive health was noted, resulting in decreased fertility among the flies. By analyzing stress-related genes such as hsp83, hsp70, hsp60, and hsp26, we detected elevated expression of hsp83 and hsp70. Our study identified hsp83 as a specific biomarker for detecting early redox changes in cells caused by PET microplastics in all the treated groups, helping to elucidate the primary defense mechanism against PET microplastic toxicity. This study offers foundational insights into the emerging environmental threats posed by microplastics, revealing discernible alterations at the genetic level.
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Effects of PET microplastics on the physiology of Drosophila
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Researchers used Drosophila fruit flies as a model to study the physiological effects of PET microplastics, finding that ingestion affected reproduction, lifespan, and gut function. The study suggests that even common plastic types found in food packaging can have measurable biological effects when consumed by living organisms.
Polyethylene microplastics affect behavioural, oxidative stress, and molecular responses in the Drosophila model
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Fruit flies exposed to polyethylene microplastics showed reduced climbing and crawling ability, increased oxidative stress, and activation of genes involved in cell death and stress responses. The microplastics overwhelmed the flies' antioxidant defenses and triggered the same cellular damage pathways associated with disease in mammals. Since fruit flies share many biological pathways with humans, these findings suggest that microplastic exposure could cause similar oxidative damage and stress responses in human cells.
Investigation of the effects of nanoplastic polyethylene terephthalate on environmental toxicology using model Drosophila melanogaster
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Researchers synthesized polyethylene terephthalate nanoplastics and fed them to fruit flies to assess their toxic effects. The nanoplastics caused increased oxidative stress, reduced survival rates, and impaired reproductive capacity in the exposed flies. The study demonstrates that PET nanoplastics, one of the most common plastic types in food and beverage packaging, can have measurable toxic effects on living organisms.
Toxicological Profile of Polyethylene Terephthalate (PET) Microplastic in Ingested Drosophila melanogaster (Oregon R+) and Its Adverse Effect on Behavior and Development
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Researchers fed PET microplastics to fruit flies and found that the particles accumulated in their bodies and caused dose-dependent declines in movement, climbing ability, and survival rates. Higher microplastic concentrations also slowed the flies' development from larvae to adults. While fruit flies are a simple model organism, these behavioral and developmental effects suggest that chronic microplastic ingestion could impair neurological and physiological functions in animals exposed through their diet.
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.
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