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In vivo methylmercury toxicity is exacerbated by polystyrene microplastic exposure, leading to colon barrier disruption, gut dysbiosis, and systemic oxidative imbalance
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Researchers found that co-exposure to polystyrene microplastics and methylmercury worsens biological harm beyond what either contaminant causes alone, disrupting the colon barrier, destabilizing gut microbiota, and triggering systemic oxidative imbalance — underscoring the importance of studying pollutant mixtures rather than individual contaminants in isolation.
evidence that combined PS-MP and MeHg exposure exacerbates some biological outcomes noted with individual contaminant exposure, indicating the importance of considering co-contamination scenarios in risk assessment of emerging pollutants.
More Papers Like This
In vivo methylmercury toxicity is exacerbated by polystyrene microplastic exposure, leading to colon barrier disruption, gut dysbiosis, and systemic oxidative imbalance
AI summary Read the abstract
Researchers co-exposed rats to environmentally relevant doses of methylmercury and 5-µm polystyrene microplastics for eight weeks, finding that combined exposure caused greater gut barrier disruption, dysbiosis, oxidative stress, and systemic inflammation than either contaminant alone — with the intestine emerging as an early and sensitive target.
In vivo methylmercury toxicity is exacerbated by polystyrene microplastic exposure, leading to colon barrier disruption, gut dysbiosis, and systemic oxidative imbalance
AI summary Read the abstract
Researchers co-exposed rats to environmentally relevant doses of methylmercury and polystyrene microplastics for eight weeks and found synergistic damage to the colon — including tight junction breakdown, gut dysbiosis, and amplified oxidative stress — with systemic cytokine release propagating injury to the liver, kidneys, and heart beyond what either contaminant caused alone.
Combined toxicity of co-exposure to polystyrene nanoplastics and arsenic on the gut-liver axis in mice.
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Mice exposed to both nanoplastics and arsenic together, common pollutants that can show up in food and water, suffered worse gut and liver damage than expected, including a weakened gut barrier, disrupted gut bacteria, and increased inflammation. This suggests that real-world exposure to multiple pollutants at once may pose greater health risks than studying each one alone would predict.
Influence of polystyrene nanoparticles on the toxicity of tetrabromobisphenol A in human intestinal cell lines
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When human intestinal cells were exposed to both polystyrene nanoparticles and the flame retardant TBBPA together, the chemical pollutant dominated the toxic response, causing oxidative stress, DNA damage, and disruption of mitochondrial function. The study shows that mixing microplastics with other contaminants can produce complex, hard-to-predict health effects in gut cells, which matters because people are routinely exposed to multiple pollutants at once.
Combined exposure to polyvinyl chloride and polystyrene microplastics induces liver injury and perturbs gut microbial and serum metabolic homeostasis in mice
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Mice exposed to a combination of PVC and polystyrene microplastics for 60 days developed liver damage, gut barrier breakdown, and disrupted gut bacteria. The co-exposure also raised cholesterol and triglyceride levels in both blood and liver, and altered hundreds of metabolites related to fat metabolism. Since people are typically exposed to multiple types of microplastics simultaneously, this study suggests the combined effects may be worse than exposure to a single type alone.
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