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Drosophila melanogaster as a dynamic in vivo model organism reveals the hidden effects of interactions between microplastic/nanoplastic and heavy metals
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Researchers used Drosophila melanogaster as an in vivo model to reveal that interactions between micro/nanoplastics and heavy metals produce combined toxic effects that are more severe than exposure to either contaminant alone.
Plastic waste in different environments has been constantly transforming into microplastic/nanoplastic (MNPLs). As they may coexist with other contaminants, they may behave as vectors that transport various toxic trace elements, including metals. Because the impact of exposure to such matter on health still remains elusive, the abundant presence of MNPLs has lately become a pressing environmental issue. Researchers have been utilizing Drosophila melanogaster as a dynamic in vivo model in genetic research for some time. The fly has also recently gained wider recognition in toxicology and nanogenotoxicity studies. The use of nanoparticles in numerous medical and consumer products raises serious concern, since many in vitro studies have shown their toxic potential. However, there is rather limited in vivo research into nanomaterial genotoxicity using mice or other mammalians owing to high costs and ethical concerns. In this context, Drosophila, thanks to its genetic tractability, short life span, with its entire life cycle lasting about 10 days, and distinct developmental stages, renders this organism an excellent model in testing toxic effects mediated by MNPLs. This review therefore aims to encourage research entities to employ Drosophila as a model in their nanogenotoxicity experiments focusing on impact of MNPLs at the molecular level.
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This study used fruit flies to investigate how polystyrene microplastics interact with two heavy metal pollutants — cadmium and silver — after ingestion. The combined exposures demonstrated that microplastics can alter the toxic effects of heavy metals, supporting the concern that microplastics act as carriers that change how harmful metals affect living organisms.
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Scientists used fruit flies to study how tiny plastic particles called nanoplastics, even smaller than microplastics, might harm living things, since flies share many basic biological traits with humans. This "One Health" approach connects the dots between environmental pollution, animal health, and human health, helping researchers understand how nanoplastic exposure could potentially affect our bodies too. As nanoplastics turn up more and more in our food, water, and air, this kind of research matters because it helps scientists figure out what health risks these invisible pollutants might actually pose to people.
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