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Long-term Low-dose Nanoplastic Exposure Induces Neurotoxicity with Oxidative Brain Damage-Transcriptomics Data
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Researchers chronically exposed male mice to polystyrene nanoplastics via drinking water for 17 months and performed transcriptomic analysis of brain tissue, finding significant upregulation of Alzheimer's, Parkinson's, and cardiovascular disease pathways—suggesting long-term nanoplastic exposure drives systemic molecular network reorganization well beyond the brain.
This study aims to investigate the long-term effects of chronic exposure to polystyrene nanoplastics (PS-NPs) on systemic molecular networks, with a particular focus on neurodegenerative. Transcriptomic analysis revealed significant upregulation of pathways associated with Alzheimer disease, Parkinson disease, even cardiovascular disease pathways like diabetic cardiomyopathy which is quite surprising, indicating systemic molecular network reorganization driven by prolonged PS-NPs exposure. Sample Information: Animal model: 5-week-old male C57BL/6J mice Experimental duration: 17 months Group design: Control group (n=3): standard sterile drinking water PS-NPs group (n=3): drinking water supplemented with polystyrene nanoplastics Exposure route: continuous oral administration via drinking water; water bottles replaced weekly Tissue collected: brain tissue Endpoint: upon the first natural death among all mice, the remaining animals were euthanized
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Scientists exposed mice to tiny plastic particles (nanoplastics) at low doses over 17 months—mimicking the kind of gradual exposure humans might get from everyday plastic use—and found it caused brain inflammation, oxidative damage, and activated genetic pathways linked to diseases like Parkinson's. While the mice didn't show major behavior changes, this study suggests that even small, ongoing amounts of plastic exposure over time could quietly harm brain health, reinforcing why reducing plastic exposure in daily life may be worth considering. More research is needed to confirm whether these effects translate to humans
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