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Ingestion of microplastics by Mediterranean mussel (Mytilus galloprovincialis): Influence of particle size on histopathological and oxidative stress responses
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This study investigated how Mediterranean mussels (Mytilus galloprovincialis) respond to microplastic ingestion with varying particle sizes, examining histopathological changes and oxidative stress indicators in tissues. The findings reveal that microplastic exposure causes tissue-level damage and oxidative stress in commercially important shellfish, with implications for seafood safety.
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An assessment of the ability to ingest and excrete microplastics by filter-feeders: A case study with the Mediterranean mussel
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Mediterranean mussels (Mytilus galloprovincialis) were exposed to spherical polystyrene microplastics of different sizes and concentrations and examined for tissue-level effects and ingestion/egestion dynamics, with smaller particles showing greater retention and histological changes in digestive tissue. The study provides detailed pathophysiological evidence that MP size governs both retention time and the severity of tissue-level effects in marine filter feeders.
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Researchers exposed Mediterranean mussels to polyethylene microplastics at environmentally relevant concentrations and found significant reductions in filtration rate and signs of oxidative damage in the digestive gland. The study suggests that microplastics as small as 40-48 micrometers can disrupt antioxidant defenses in bivalves even at low concentrations, raising concerns about their impact on marine filter-feeders.
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Researchers exposed mussels to both tiny polystyrene microparticles and larger polyethylene plastic fragments and found that both sizes triggered oxidative stress in the animals. The plastic exposure caused DNA damage, weakened cellular membranes, and destabilized immune cell structures in the mussels' gills and digestive glands. The findings indicate that plastics of any size and polymer type can be harmful to marine filter-feeding organisms.
Histopathological and cytochemical analysis of ingested polyethylenepowder in the digestive gland of the blue mussel, Mytilus edulis (L.)
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Researchers examined the damage caused by ingested polyethylene powder in the digestive glands of blue mussels using microscopy and chemical staining, providing histological evidence of cellular effects. The study demonstrated that physical ingestion of plastic particles causes measurable tissue-level harm in the digestive organs of these widely consumed shellfish.
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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.
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