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Eco-corona: A new frontier in understanding micro- and nanoplastic-gut interactions
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Tiny plastic particles floating in the environment don't stay "clean", they quickly pick up a coating of molecules, germs, and pollutants (called an "eco-corona"), which can change how harmful they are once swallowed. This review of existing research suggests this coating may help plastics carry toxins and bacteria into our gut, potentially disrupting the gut lining, triggering inflammation, and throwing off the balance of gut bacteria. The science is still early, but it's a reminder that when we study microplastics' health risks, we need to look at what's riding along on their surface, not just the plastic itself.
Plastics released into natural environments undergo complex transformations, ending in the spontaneous formation of an “eco-corona”, a dynamic layer of adsorbed organic molecules, biomolecules, and microorganisms. This eco-corona profoundly alters the physicochemical identity of micro- and nanoplastics, modulating their environmental fate, pollutant adsorption, cellular uptake, and toxicity. Emerging evidence shows that eco-corona-coated plastics can act as vectors for environmental pollutants and microbial pathogens, raising significant concerns for ecosystems and human health, particularly in the gastrointestinal tract. Eco-corona dynamics influence colloidal stability, pollutant vectorization, immune responses, and interactions with the gut microbiota, potentially contributing to barrier dysfunction, inflammation, and microbiota dysbiosis. However, major knowledge gaps persist regarding the real-world composition and evolution of eco-coronas, their interplay with biological coronas, and their long-term impacts on health. This mini review synthesizes current insights into eco-corona formation, its modulation of micro- and nanoplastic behavior and toxicity, and highlights critical research priorities to better understand and mitigate the emerging risks at the interface between plastic pollution and gastroenterology.
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The Eco-corona of Microplastics: Environmental Transformations, Biological Interactions, and Health Implications
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When microplastics enter the environment, they quickly get coated with a mix of bacteria, natural gunk, and pollutants—almost like a dirty film building up on their surface. This review of existing research shows that this coating changes how microplastics behave in our bodies, potentially affecting how they're absorbed, how our immune system reacts, and even oral health. The takeaway: studying "naked" lab-made microplastics may not tell us much about the real risks, since the particles we actually encounter come with this altered, potentially more harmful coating attached.
Toxicity of micro/nanoplastics in the environment: Roles of plastisphere and eco-corona
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This review examines how microplastics and nanoplastics gain biological coatings in the environment: larger microplastics develop a "plastisphere" of microorganisms on their surface, while smaller nanoplastics get wrapped in proteins and organic matter forming an "eco-corona." Both coatings change how toxic the particles are to living organisms and humans. The review highlights that studying plastic particles without these coatings, as most lab experiments do, may underestimate or mischaracterize their real-world health risks.
The Composition of the Eco-corona Acquired by Micro- and Nanoscale Plastics Impacts on their Ecotoxicity and Interactions with Co-pollutants
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This review examines how the 'eco-corona' — a layer of environmental biomolecules adsorbing onto plastic particle surfaces — alters the toxicity, transport, and interaction with co-pollutants of micro- and nanoplastics, emphasizing that this biological coating fundamentally changes how plastics behave in living organisms.
Eco-corona formation and associated ecotoxicological impacts of nanoplastics in the environment
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This review examines how nanoplastics interact with natural organic matter in the environment to form an 'eco-corona,' a coating of biomolecules on the particle surface that changes their behavior and toxicity. Researchers found that eco-corona formation alters nanoplastic stability, transport, and biological interactions in ways that can either increase or decrease their harmful effects on organisms. The study highlights the importance of considering these surface transformations when assessing the real-world environmental risks of nanoplastic pollution.
Toxicokinetics and Toxicological Implications of Eco- and Bio-Corona Formation on Micro- and Nanoplastics in Aquatic Systems
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This review pulls together existing research showing that microplastics in water aren't just plain plastic bits—they pick up a coating of natural gunk (proteins, oils, microbial residue) that changes how they interact with pollutants and living tissue. This matters because whether these coated plastics carry extra toxins into the body, or actually make them less harmful, depends heavily on the specific chemical involved (like antibiotics, PFAS "forever chemicals," or heavy metals), meaning blanket claims about microplastic danger oversimplify a genuinely complicated picture. The takeaway for consumers: the risk isn't just about how much
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