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Distribution and Effects of Model Palladium-Doped Nanoplastics in the Marine Mussel Mytilus galloprovincialis
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Scientists fed mussels tiny plastic particles (nanoplastics) to see what happens when these pollutants enter the food chain, and found that most of the plastic passed through the mussels' waste, but a small amount stayed in their tissue and was linked to damage in their digestive system. Since mussels and other shellfish are commonly eaten by humans, this research matters because it suggests nanoplastics from ocean pollution could potentially affect the seafood we consume, though more research is needed to know if longer exposure causes bigger problems.
While nanoplastics (NPs, <1 µm) concentration is anticipated to increase in the marine environment, the analytical tools for NP quantification and data on their impacts are still scarce. This work aimed to expand knowledge regarding bioaccumulation and effects of NPs on the sentinel organism Mytilus galloprovincialis. For this, mussels were dietarily exposed for 7 days to model palladium-doped-polystyrene NPs (Pd-PS NPs) of 142.6 ± 1.0 nm at 1 × 109 Pd-PS NPs/mL. ICP-MS analysis on water samples showed that after one day of exposure no Pd was detected suggesting that mussels cleared the NPs. After 7 days of exposure, 14% of the Pd introduced in the tanks was found in feces. Less than 0.02% passed into the hemolymph of mussels and consequently, no responses were observed on hemocytes. Approximately 1% of the Pd was found in soft tissues. This could be linked to the significantly higher prevalence of digestive tubule atrophy observed in exposed mussels in comparison to controls. No effects were observed at the whole organism level. In conclusion, mussels were able to uptake and to eliminate Pd-PS NPs through feces. Whether longer exposures could cause a significant accumulation of NPs and produce associated biological effects remains to be studied.
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Histopathological analysis of mussels Mytilus galloprovincialis after foodborne exposure to three sizes of polystyrene nanoplastics: Relevance of confounding factors.
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Scientists fed tiny plastic particles (nanoplastics) to mussels through their food to see if it caused health problems, since mussels are good indicators of ocean health and people eat them. The plastic particles did cause some tissue damage and inflammation in the mussels, but other factors like reproductive cycles and parasites had bigger effects on their health. This suggests that short-term exposure to small amounts of nanoplastics may not be as harmful as previously thought, though longer studies are still needed to understand the risks to both marine life and humans who eat seafood.
Impact of Synthetic Microfibers on Cellular and Biochemical Biomarkers in Mussel Mytilus galloprovincialis
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Scientists found that tiny plastic fibers from clothing and fishing gear can harm mussels by damaging their cells and disrupting important body functions, even at pollution levels currently found in our oceans. This matters because mussels filter water and are eaten by humans, so plastic pollution that harms these shellfish could also affect the safety of seafood we consume. The study shows that microplastic pollution is already at levels that can damage marine life we depend on for food.
Polystyrene nanoplastics in the marine mussel Mytilus galloprovincialis.
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This study investigated how polystyrene nanoplastics affect Mediterranean mussels, an important marine species and human food source. Researchers found that these tiny plastic particles can cross cell membranes, accumulate in tissues, and trigger oxidative stress and immune responses. The findings suggest that nanoplastic pollution in the ocean could affect both marine ecosystem health and the safety of seafood consumed by people.
Micro and Nanoplastics size distribution in mussel tissues: first evidence, identification, and quantification in the nanogram range
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Italian researchers used a highly sensitive mass spectrometry technique to detect and quantify both microplastics and nanoplastics in farmed mussels, finding plastic particles in every sample tested. Nanoplastics in the 20–200 nm range were present in substantial quantities, and the authors estimate that European seafood consumers could ingest over 2 milligrams of nanoplastics per year through mussel consumption alone. This is one of the first studies to directly quantify nanoplastics in a commonly eaten seafood, raising significant concerns about dietary exposure.
Polystyrene nanoplastics exacerbate cadmium-induced bioenergetic impairment and oxidized phospholipid accumulation in the mussel Mytilus coruscus
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Scientists found that tiny plastic particles (nanoplastics) can act like a "delivery truck" for the toxic heavy metal cadmium, helping it build up in shellfish tissue and causing more cell damage than cadmium alone. This matters because it shows how plastic pollution and heavy metals in our oceans can team up to harm marine life more severely than either would separately, and since mussels and other seafood are part of the human food chain, this combined contamination could eventually affect the food we eat.
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