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Size-dependent toxicity of microplastics and nanoplastics: insights from the Drosophila melanogaster model
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This review of fruit fly studies found that the smaller plastic particles get, the more damage they can do — tiny "nanoplastics" can slip into cells and even DNA, causing effects like inflammation, immune problems, and issues that carry over to offspring, while larger microplastics mostly cause gut irritation. Since fruit flies share a lot of genetic similarities with humans, these findings suggest that the increasingly tiny plastic fragments in our air, water, and food could pose greater health risks than larger plastic debris, making it important to keep studying how the smallest plastics affect our bodies.
Microplastics and nanoplastics (MNPs) are ubiquitous environmental pollutants that enter organisms and induce multi-system damage. Particle size is a critical determinant of MNPs’ bioavailability, biodistribution, and toxic intensity, with smaller particles exhibiting stronger biopermeability and toxic hazards. Drosophila melanogaster (fruit fly) has emerged as an ideal model organism for investigating MNPs’ toxic mechanisms due to its short life cycle, clear genetic background, and high genetic homology with humans.This review systematically summarises research on the toxicity of MNPs with different sizes based on the Drosophila model, clarifying the size-dependent toxicity pattern. Large microplastics (1–5 mm) remain in the digestive tract, causing local physical damage and dysbiosis. Small microplastics (1 μm–1 mm) induce intestinal damage, oxidative stress, as well as abnormalities in behaviour and reproduction. Submicroplastics (100 nm–1 μm) can penetrate the intestinal barrier, triggering systemic inflammation and cardiac dysfunction. Nanoplastics (<100 nm) possess the strongest biopermeability, invading cells and organelles to cause DNA damage, immune disorders, and transgenerational toxicity, while also exacerbating synergistic toxicity with heavy metals via ‘carrier effects’.This review provides a theoretical basis for MNP risk assessment and highlights the unique value of the Drosophila model in this field. Microplastics and nanoplastics (MNPs) are ubiquitous environmental pollutants that enter organisms and induce multi-system damage. Particle size is a critical determinant of MNPs’ bioavailability, biodistribution, and toxic intensity, with smaller particles exhibiting stronger biopermeability and toxic hazards. Drosophila melanogaster (fruit fly) has emerged as an ideal model organism for investigating MNPs’ toxic mechanisms due to its short life cycle, clear genetic background, and high genetic homology with humans. This review systematically summarises research on the toxicity of MNPs with different sizes based on the Drosophila model, clarifying the size-dependent toxicity pattern. Large microplastics (1–5 mm) remain in the digestive tract, causing local physical damage and dysbiosis. Small microplastics (1 μm–1 mm) induce intestinal damage, oxidative stress, as well as abnormalities in behaviour and reproduction. Submicroplastics (100 nm–1 μm) can penetrate the intestinal barrier, triggering systemic inflammation and cardiac dysfunction. Nanoplastics (<100 nm) possess the strongest biopermeability, invading cells and organelles to cause DNA damage, immune disorders, and transgenerational toxicity, while also exacerbating synergistic toxicity with heavy metals via ‘carrier effects’. This review provides a theoretical basis for MNP risk assessment and highlights the unique value of the Drosophila model in this field.
More Papers Like This
Size-dependent toxicity of microplastics and nanoplastics: insights from the Drosophila melanogaster model
AI summary Read the abstract
Using fruit flies (which share a lot of genetic similarity with humans), scientists reviewed existing research and found that the smaller a piece of plastic gets, the more damage it can do to a body: large microplastics mostly irritate the gut, but tiny nanoplastics can slip into cells, damage DNA, disrupt the immune system, and even affect future offspring. This matters because the plastics breaking down in our environment aren't just litter — the smallest, least visible fragments may actually pose the biggest health risks to living things, including potentially us.
Size-dependent toxicity of microplastics and nanoplastics: insights from the Drosophila melanogaster model
AI summary Read the abstract
This review of fruit fly studies reveals a clear pattern: the smaller the plastic particle, the more dangerous it is to living organisms. While large plastic pieces mostly get stuck in the gut causing local irritation, the tiniest nanoplastics can slip into cells and even DNA, triggering inflammation, organ damage, and effects that may pass on to offspring—and they can team up with heavy metal pollutants to cause even more harm. Since fruit flies share many genes with humans, these findings suggest we should pay special attention to the smallest, often invisible plastic particles in our environment, as they may pose the greatest
Drosophila melanogaster as a tractable eco-environmental model to unravel the toxicity of micro- and nanoplastics
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This review summarizes research using fruit flies as a model to study how micro- and nanoplastics harm living organisms. Studies show these tiny plastic particles cause oxidative stress, inflammation, DNA damage, and reproductive problems in flies, with males being more vulnerable than females -- findings that may help us understand similar risks in humans.
The effects of microplastics and nanoplastics upon history, policies, and Drosophila melanogaster
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This study examined the effects of microplastics and nanoplastics on the fruit fly Drosophila melanogaster, finding that dietary exposure to these pervasive environmental contaminants causes measurable biological harm and making the case for stronger regulatory policies.
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.
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