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Exposure to Polystyrene Nanoplastics Led to Learning and Memory Deficits in Zebrafish by Inducing Oxidative Damage and Aggravating Brain Aging
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Exposure to Polystyrene Nanoplastics Led to Learning and Memory Deficits in Zebrafish by Inducing Oxidative Damage and Aggravating Brain Aging
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Zebrafish exposed to polystyrene nanoplastics developed significant learning and memory problems, taking longer to navigate mazes and showing signs of accelerated brain aging. The nanoplastics caused oxidative damage, energy shortages, and disrupted the cell cycle in brain tissue. This study adds to growing evidence that nanoplastics small enough to cross the blood-brain barrier could impair cognitive function, raising concerns about long-term brain health effects from environmental nanoplastic exposure.
Simulated Environmental Nanoplastics Induce Zebrafish Developmental Toxicity and Stress Response
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Scientists exposed zebrafish embryos to nanoplastics that were specially broken down to mimic how plastic actually degrades in oceans and rivers, and found they caused more harm than the lab-made plastic beads typically used in research, stunting growth, slowing hatching, and triggering stress hormone spikes even at very low doses. Because these effects showed up at concentrations similar to what's found in real water sources, the findings suggest current safety testing may be underestimating the risks nanoplastics pose to both aquatic life and, potentially, to people who drink that water or eat seafood from it.
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