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Effects of exposure to micro/nanoplastics of polystyrene on neuronal oxidative stress, neuroinflammation, and anxiety-like behavior in mice
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Researchers exposed Swiss albino mice to polystyrene micro- and nanoplastics and compared the stress and liver toxicity responses, finding that both sizes elevated cortisol levels and caused hepatotoxic damage, with nanoplastics generally producing more pronounced physiological disruption than microplastics.
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This systematic review examined 24 studies on how polystyrene microplastics and nanoplastics affect the brains of mice. The findings consistently showed that exposure led to increased oxidative stress, brain inflammation, and anxiety-like behavior. Maternal exposure also caused brain-related harm in offspring, suggesting these tiny plastic particles could pose real risks to the nervous system.
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Researchers reviewed evidence from cell and animal studies on the toxic effects of micro- and nanoplastics, finding that these particles can cause inflammation, oxidative stress, and organ damage in laboratory models, raising concern about what chronic low-level human exposure might mean for long-term health.
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