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The effect of different types of microplastic and acute cadmium exposure on the Mytilus galloprovincialis (Lamarck, 1819)
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This study examined how different types of microplastics, alone and combined with cadmium, affect Mediterranean mussels that are widely consumed as seafood. Exposure to microplastics and cadmium caused oxidative stress, tissue damage, and neurotoxicity in the mussels, with combined exposure being worse than either pollutant alone. The health risk calculations for human consumers exceeded safety limits, suggesting that microplastic-contaminated mussels could pose a real food safety concern.
Microplastic (MP) pollution is a pressing issue for both environmental health and the safety of human food sources. This study provides a comprehensive analysis of the effects of MPs on Mediterranean mussels (Mytilus galloprovincialis, Lamarck 1819), focusing on the food safety risks associated with MP and cadmium (Cd) exposure in these organisms intended for consumption. The retention of different polymer types of MPs in mussels was specifically evaluated, and the influence of Cd on MP retention across these polymers was investigated. Mussels were exposed to polystyrene (PS), polypropylene (PP), and polyethylene terephthalate (PET) MPs individually and in combination with the toxic metal Cd for a duration of 7 days. Antioxidant enzymes, oxidative stress parameters, and digestive system enzyme activities, selected as biomarkers for Cd and MPs pollution, were assessed. Furthermore, human consumption risk evaluations and limits regarding mussel intake were analysed in terms of food safety. The results suggest that exposure to Cd, MPs, or their combination induces oxidative stress, tissue damage, and neurotoxicity. Alterations in digestive enzyme activities could impact the mussels' energy acquisition from food and their capacity to conserve energy reserves. The estimated daily intake (EDI), provisional tolerable weekly intake (PTWI), target hazard quotient (THQ), and target cancer risk (TCR) levels for all groups surpassed established limits, implying a significant health risk for humans consuming these products. These results underscore the potential health risks for humans associated with consuming mussels exposed to Cd and/or MPs and provide valuable data for monitoring pollution levels and ecological risks in aquatic organisms. Additionally, our findings reveal that the retention of Cd in mussel tissues varies significantly after exposure, with combinations of PET and Cd showing lower levels of Cd accumulation compared to other groups, suggesting a differential interaction that influences Cd retention.
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This study investigated how co-exposure to microplastics and cadmium affects DNA damage in the Mediterranean mussel Mytilus galloprovincialis. Microplastics acted as vectors for cadmium, and combined exposure resulted in greater genotoxic effects than either pollutant alone.
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Scientists found that tiny plastic particles in the ocean can carry toxic cadmium and deliver it to mussels, but surprisingly, the plastic-bound cadmium was actually less harmful than cadmium alone, possibly because the metal doesn't fully release from the plastic once eaten. Interestingly, plastics that had already been weathered by sun and seawater picked up less cadmium than fresh plastic. Since mussels and other seafood are a major way microplastics and their hitchhiking pollutants enter the human food chain, this research helps clarify how much of a risk these combined pollutants actually pose to the mar
Impacts of Microplastics, Cadmium, and Their Mixtures on Biochemical Biomarkers in the Freshwater Bivalve Corbicula fluminea (Bivalvia, Corbiculidea)
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This study evaluated the combined impacts of microplastics and cadmium on biochemical biomarkers in a freshwater organism, finding that co-exposure caused greater oxidative stress and cellular damage than either contaminant alone. Microplastics appear to enhance cadmium bioavailability and toxicity.
Physiological and biochemical responses to caffeine and microplastics in Mytilus galloprovincialis
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Researchers exposed Mediterranean mussels to caffeine and microplastics both separately and together to measure their combined effects. The combination caused greater oxidative stress and changes in cell function than either pollutant alone. While focused on mussels, the study is relevant to human health because mussels are widely eaten as seafood and can accumulate both microplastics and chemical contaminants.
Simultaneous exposure to microplastics and heavy metal lead induces oxidative stress, histopathological damage, and immune dysfunction in marine mussel Mytilus coruscus
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When marine mussels were exposed to both microplastics and the heavy metal lead together, the combined effect was worse than either pollutant alone. The combination caused more severe tissue damage, higher oxidative stress, and greater immune system disruption, which is concerning because in real ocean environments, microplastics and heavy metals commonly occur together.
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