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Preliminary evidence of polyvinyl chloride microplastics inducing ferroptosis in the cerebral cortex of ducks
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Scientists found that when ducks drank water containing PVC microplastics (a common plastic found in pipes, packaging, and other everyday items), the plastic particles built up in their brains, weakened the protective barrier that shields the brain from harmful substances, and triggered a harmful type of cell death linked to iron buildup and damage. While this study was done in ducks, not humans, it adds to growing evidence that ingesting microplastics may harm the brain — a concern worth watching as research on human exposure continues.
Ferroptosis, a type of regulated cell death, is frequently observed in mammalian brain cortical injuries and diseases linked to iron metabolism disorders. Recent evidence suggests that microplastic exposure may trigger such ferroptosis-related pathologies. However, the mechanism and impact of ferroptosis-induced cerebral cortex damage in waterfowl due to microplastic exposure remain unclear. In this study, Muscovy ducks were divided into three groups receiving: pure water, 1 mg·L⁻¹ polyvinyl chloride microplastics (PVC-MPs), or 10 mg·L⁻¹ PVC-MPs for two months. This study suggests that PVC-MPs may accumulate in the duck cerebral cortical tissue, where they disrupt blood-brain barrier (BBB) integrity as manifested by ultrastructural damage and significant downregulation of tight junction protein levels (ZO-1, Occludin, and Claudin-5). Moreover, PVC-MPs exposure induced histopathological and nuclear ultrastructural damage, along with oxidative stress and excessive iron accumulation, both hallmarks of ferroptosis. Specifically, PVC-MPs triggered mitochondrial cristae fragmentation and shrinkage, as well as lipid peroxidation accumulation, evidenced by elevated MDA levels. Western blot analysis confirmed ferroptosis through significant downregulation of SLC7A11, GPX4, and FTH1, and upregulation of COX2. In conclusion, this study suggests that PVC-MPs may accumulate in the duck cerebral cortex, where they disrupt BBB integrity and induce histopathological damage, as well as disturb redox homeostasis and trigger ferroptosis, ultimately leading to neuronal injury.
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Ferroptosis: First evidence in premature duck ovary induced by polyvinyl chloride microplastics
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Researchers discovered that polyvinyl chloride microplastics caused premature ovarian damage in ducks through a cell death process called ferroptosis, which involves iron-dependent oxidative damage. Higher microplastic concentrations led to iron accumulation, increased oxidative stress, and structural damage to ovarian tissue. This is the first evidence linking microplastic exposure to ferroptosis in the avian reproductive system.
Evaluating the Hepatotoxicity of Polyvinyl Chloride Microplastics in Ducks: Oxidative andFibrotic Outcomes
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Researchers fed ducks low and high doses of polyvinyl chloride (PVC) microplastics for two months and found that the particles accumulated in the liver, causing fat buildup, scarring, and cell death — similar to fatty liver disease in humans — suggesting plastic pollution may harm bird liver health in ways previously only studied in mammals.
Toxicological impact of polyvinyl chloride microplastic-contaminated food: Evidence from a mouse model
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Scientists fed mice food contaminated with PVC microplastics (a common plastic found in packaging and pipes) for 13 weeks to see what happens inside the body. At higher doses, the plastic particles damaged the liver, kidneys, and intestines, slowed growth, deformed red blood cells, and weakened the body's natural defense against cell damage—even though the plastic itself mostly stayed in the gut. While this was a mouse study, not a human one, it raises real concerns about what swallowing microplastics in our food might be doing to our bodies over time.
The mechanism of vascular injury caused by polystyrene microplastics: Involving ferroptosis and metabolomics
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Mice exposed to microplastics showed damaged blood vessels, worse cholesterol levels, and a type of cell death called ferroptosis (basically cells dying from oxidative damage). A drug that blocked this cell death reduced the vessel damage, hinting that microplastics may harm heart and blood vessel health, though this was shown in mice, not yet confirmed in humans.
Secondary brain injury after polystyrene microplastic-induced intracerebral hemorrhage is associated with inflammation and pyroptosis
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Researchers studied how polystyrene microplastics affect brain tissue in chickens after six weeks of continuous exposure. The study found that microplastic exposure caused cerebral hemorrhage, microthrombi formation, and loss of Purkinje cells, with secondary brain injury driven by inflammatory responses and pyroptosis activation.
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