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Microplastic-induced oxidative stress response in turbot and potential intake by humans
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Researchers examined microplastic contamination in turbot tissues and assessed the oxidative stress response caused by ingested particles. They found that microplastics accumulated most heavily in the gills and caused significant oxidative damage, particularly in the liver. The study also estimated human microplastic intake through fish consumption, highlighting a potential pathway for dietary exposure.
Microplastic (MP) pollution has become a health concern subject in recent years. Althoughann increasing number of studies about the ingestion of microplastics by fish, research on the oxidative stress response to MPs in natural environments is quite limited. In this study, the identification and characterization of MPs in gill (G), muscle tissues (M), and gastrointestinal tract (GI) of turbot (Scophthalmus maximus) were evaluated. Oxidative damage of MPs on the brain (B), liver (L), gill (G), and muscle (M) tissues as well as their effect on superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), paraoxonase (PON), arylesterase (AR) myeloperoxidase (MPO), and malondialdehyde (MDA) biomarkers were evaluated. The potential transmission of MPs from muscle tissues to humans was examined. Results showed that gills contain the highest amounts of MPs, ethylene propylene is the most dominant polymer type, black and blue are the most common MP color, fiber is the most common shape, and 50-200 µm is the most common MP size. Results showed that MPs cause oxidative stress of tissues with inhibiting effect on enzyme activities and promoting impact on lipid peroxidation. The oxidative damage mostly affected the liver (detoxification organ) followed by gill tissue. The intake of MPS in the European Union was estimated by EFSA as 119 items/year, while in Turkey it is 47.88 items/year. This study shows that more research is needed in terms of ecosystem health and food chain safety. The risk assessment of MPs in living organisms and environmental matrices including food safety and human health should be considered a public health issue.
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Researchers tracked microplastics in whiting fish from the Black Sea over two years, finding plastics in all tissues tested, with levels linked to signs of tissue stress and changes in fillet quality. Estimated microplastic intake for people eating this fish ranged from near zero to 0.33 items per year, depending on consumption level.
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About 27% of striped red mullet caught in the Mediterranean had ingested microplastics, but analysis of their livers showed no significant oxidative stress or cellular damage. The study suggests that at current environmental concentrations, microplastic ingestion by this commercially important fish species does not cause measurable acute harm to organ tissue.
Evaluation of Microplastics and Oxidative Stress Biomarkers in Marine Fish
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Scientists found tiny plastic bits (from things like packaging and synthetic fabrics) inside the gills, guts, and muscle of three popular seafood fish, and these plastics were linked to cell damage from oxidative stress—basically, wear and tear at the cellular level that varied depending on the fish species. This matters because it suggests the fish we eat may be absorbing plastic pollution in ways that affect their health, and since we eat the muscle tissue too, it raises questions about what we might be consuming along with our seafood—though more research is needed to know exactly how this impacts human health.
Microplastics in Fish and Fishery Products and Risks for Human Health: A Review
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This review summarizes existing research on microplastic contamination in fish and seafood products and the associated human health risks. Microplastics found in fish can carry harmful chemicals and pathogens, and once eaten by humans, they may cause oxidative stress and move from the gut to other tissues. The review highlights seafood as a major dietary source of microplastic exposure and calls for better monitoring and risk assessment.
Effects of microplastics in freshwater fishes health and the implications for human health
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This review examines how microplastics affect the health of freshwater fish, which are a major protein source for billions of people. Fish ingest microplastics that accumulate in their guts, gills, and tissues, leading to inflammation, oxidative stress, and disrupted growth. Since microplastics in fish tissue can transfer to humans through the food chain, this is relevant to both ecosystem and human health.
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