We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Multisystemic effects of nanoplastics in immature rats subjected to prolonged oral exposure with particular emphasis on prooxidant potential
AI summary Read the abstract
Scientists fed young rats tiny plastic particles (like those found in everyday plastic pollution) for three weeks and found they built up in the liver, kidneys, and brain—even at low doses. This exposure damaged the tiny energy-producing structures in cells (mitochondria) and triggered oxidative stress, a type of cell damage linked to aging and disease, with the liver hit hardest. While this study was in young rats, not humans, it raises real concerns about how early-life exposure to nanoplastics—now widespread in food, water, and air—might affect organ health over time.
Two-week-old rats were administered a low dose (1 mg/kg b.w.) of small fluorochrome-labelled PS-NPs (25 nm) by oral gavage for three weeks. Findings demonstrate that PS-NPs accumulated within the liver, kidneys, and brain, with the highest fluorescence intensity found in the liver and lowest in the brain. Ultrastructural analysis showed tissue-specific alterations to mitochondrial dynamics, including excessive fission in the liver and kidney, and fusion in the brain, accompanied by mitochondrial swelling and membrane damage. Markers of oxidative stress, such as significantly increased protein oxidation, were found in all organs, while in the liver, an additionally increased level of lipid peroxidation product (MDA) was observed. Results further showed tissue-specific variations in enzymatic antioxidant systems.
More Papers Like This
Systemic effects of nanoplastics on multi-organ at the environmentally relevant dose: The insights in physiological, histological, and oxidative damages
AI summary Read the abstract
Researchers gave mice nanoplastics at doses estimated to match real-world human exposure levels and found the particles crossed the intestinal barrier and accumulated in the liver and kidneys. Even at these low, environmentally relevant doses, the nanoplastics caused oxidative stress and tissue damage across multiple organs. The findings suggest that everyday nanoplastic exposure may pose broader health risks than previously assumed.
Nanoplastics-induced oxidative stress, antioxidant defense, and physiological response in exposed Wistar albino rats
AI summary Read the abstract
Researchers orally exposed Wistar rats to polystyrene nanoplastics at multiple doses for five weeks and observed dose-dependent increases in oxidative stress. The study found significant alterations in liver and kidney function markers, disrupted energy metabolism, and changes in antioxidant enzyme activity, suggesting that nanoplastic exposure may affect multiple organ systems in mammals.
Polystyrene nanoplastics elicit early mitochondria-associated phenotypic, metabolic, and functional responses in human hepatocytes
AI summary Read the abstract
Scientists exposed human liver cells to tiny plastic particles (nanoplastics) at levels that didn't kill the cells, but found the cells' "power plants" (mitochondria) were already struggling—burning less fuel and producing less energy—along with other changes in how the cells process fat and nutrients. This matters because it suggests nanoplastics, which have already been found in real human liver tissue, may quietly stress liver cells and disrupt their metabolism even before any visible damage occurs, raising questions about long-term effects of everyday plastic exposure on liver health.
Polyethylene Microplastics and Mitochondrial-Redox Dysfunction in Preclinical Rodent Models: A Systematic Review and Meta-Analysis of Bioenergetic and Oxidative Stress Outcomes
AI summary Read the abstract
This review pulled together existing animal studies on tiny plastic particles (polyethylene microplastics, common in packaging and everyday products) and found a consistent pattern: these particles seem to damage mitochondria, the "power plants" inside our cells, and trigger harmful oxidative stress, which can wear down tissues over time. Since this research is in rodents, not humans, more studies are needed to confirm the same effects happen in people, but the findings raise real concerns about how the microplastics we're increasingly exposed to might affect long-term cellular health and energy production in our bodies.
Aged fragmented-polypropylene microplastics induced ageing statues-dependent bioenergetic imbalance and reductive stress: In vivo and liver organoids-based in vitro study
AI summary Read the abstract
Researchers tested UV-aged polypropylene microplastics from everyday plastic cup lids on mice and lab-grown liver tissue, finding that more heavily aged particles caused greater liver damage. The aged microplastics disrupted energy production in liver cells and caused a harmful buildup of antioxidant molecules, suggesting that the weathered microplastics people encounter in daily life may be more toxic than pristine ones.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.