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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.
Abstract Microplastics have emerged as a pervasive environmental pollutant with significant ecological and health implications. Once released into natural systems, these particles rarely exist in their pristine form; instead, they rapidly acquire a dynamic layer of biomolecules, natural organic matter, microbes, and pollutants known as the eco-corona. This environmental coating fundamentally alters the physicochemical identity of microplastics, restructuring their environmental fate, interactions with organisms, and toxicological potential. Particular emphasis is placed on biological outcomes, including altered uptake, immunological responses, and trophic transfer, as well as emerging insights into human exposure and health risks. Despite recent advancements in microplastics research, critical gaps remain in linking eco-corona composition to long-term environmental and health outcomes. Challenges include the lack of standardized methods, limited in vivo studies, and insufficient integration of eco-corona effects into risk assessments. Addressing these gaps will require interdisciplinary approaches that span environmental chemistry, toxicology, and public health. In this narrative review, we synthesize current evidence on the processes driving eco-corona formation, the ecological factors that influence its composition, the biological implications for the human body, particularly oral health, and the analytical approaches used for its characterization. We further highlight how eco-corona development modulates microplastic transport, bioavailability, and interactions with co-contaminants, thereby influencing ecosystem dynamics and pollutant cycling. By focusing on the eco-corona as a key factor affecting microplastic effects, this review highlights the significance of improving scientific knowledge, legal frameworks, and long-term solutions to plastic pollution.
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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.
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.
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
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 of Microplasticsin Soil Inhibits TheirRole as a Contaminant Vector While Enhancing Their Role as a MicroorganismVector
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When microplastics sit in soil, they quickly get coated with a layer of natural soil compounds—kind of like a sticky film building up on their surface. This coating actually makes it harder for microplastics to soak up and carry toxic chemicals, but it makes them better at picking up and spreading microbes, including potentially harmful ones. This matters because it means the real-world risks of microplastics in soil (and the food grown in it) may look different than lab studies without this coating suggest—less of a chemical carrier, but more of a germ carrier.
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