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Association Between Microplastic Exposure and Cognitive Function Decline
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Researchers detected PET and polypropylene microplastics in blood, urine, and feces of study participants and found a significant association between higher microplastic concentrations in biological fluids and greater cognitive function decline, particularly among those with the highest exposure levels.
Polyethylene terephthalate (PET) and polypropylene (PP) microplastics were detected in respondents' blood, urine, and feces at varying concentrations. A significant association was observed between MP exposure levels and MP concentrations in biological fluids. Higher MP concentrations were linked to cognitive decline, particularly among respondents with the highest MP levels. Risk perception regarding MPs was higher among respondents with greater awareness and knowledge, while attitudes toward MPs correlated with plastic consumption patterns CONCLUSION: This study demonstrates a significant relationship between MP exposure and health impacts, particularly cognitive decline. These findings underscore the urgency of reducing plastic use, raising public awareness, and implementing policies for plastic waste management to mitigate health risks associated with MPs.
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Frequent Plastic Usage Behavior and Lack of Microplastic Awareness Correlates with Cognitive Decline: A Cross-Sectional Survey
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Researchers conducted a cross-sectional survey examining the relationship between frequent single-use plastic consumption and cognitive function. The study found that frequent single-use plastic consumption was linked to poorer cognitive outcomes, while awareness of microplastic risks and risk perception did not directly affect cognition. The findings suggest that educational strategies may help enhance public awareness and reduce plastic exposure.
Invisible but Insidious Effects of Microplastics
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Researchers exposed rats to polyethylene terephthalate microplastics over two months and found that chronic ingestion negatively affected cognitive functions including spatial learning and memory, even without obvious changes in standard blood tests. In rats prone to age-related conditions, microplastics also contributed to the progression of cataracts and retinal degeneration. The study suggests that long-term microplastic exposure may accelerate aspects of the aging process.
Microplastics detection in freshly harvested human brain tissues of northeast Chinese postmortem donors and their correlation with Alzheimer's disease-related pathological proteins.
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Researchers examined brain tissue from 16 deceased donors in northeast China and found microplastics, including polyethylene, PVC, polystyrene and polypropylene, in all samples. Higher levels of two plastic types were linked to higher amounts of a protein associated with Alzheimer's disease, though this does not prove the plastics caused the protein changes.
Association of microplastics in human cerebrospinal fluid with Alzheimer’s disease-related changes
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Researchers detected four types of microplastics in human cerebrospinal fluid (the liquid surrounding the brain and spinal cord) and found that people with Alzheimer's disease markers had significantly higher levels of polyethylene and PVC. Higher microplastic levels in cerebrospinal fluid were linked to worse cognitive test scores and faster mental decline over one year, suggesting a potential connection between brain microplastic exposure and Alzheimer's progression.
Bioaccumulation of microplastics in decedent human brains
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Researchers found microplastics in human brain, liver, and kidney tissue samples, with plastic levels significantly higher in samples from 2024 compared to 2016. The brain contained especially high levels of polyethylene, and brains from people with dementia had even more plastic accumulation. These findings suggest that microplastics are building up in human organs over time, raising urgent questions about potential health effects.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.