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Impacts of nanoplastics on bivalve: Fluorescence tracing of organ accumulation, oxidative stress and damage
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Researchers used fluorescence tracing to track the accumulation pathways and distribution of polystyrene nanoplastics in the freshwater bivalve Corbicula fluminea. The study found that nanoplastics accumulated through multiple routes including adherence to the mantle, ingestion into the visceral mass, and respiration through the gills, and caused oxidative stress and tissue damage in multiple organs.
The outcomes of this research offer novel insights into the toxic effects of nanoparticles (i.e., nanoplastics or other nanomaterials) on the benthos. Herein, this study aimed to evaluate the accumulation pathway, distribution characteristics and potential biotoxicity of polystyrene nanoplastics in C. fluminea. The results revealed that nanoplastics could accumulate in the mantle through adherence, in the visceral mass through ingestion and in the gill through respiration. The gill, intestine and stomach were the main accumulation organs for nanoplastics. The aggregation of nanoplastics was observed in C. fluminea, which may exacerbate their biotoxicity. Moreover, oxidative stress was observed in the visceral mass, gill and mantle. Liver damage, neurotoxicity and intestinal inflammation were caused by imbalance in the antioxidation system. Analysis of IBR values showed that the visceral mass had a more effective response to oxidative stress than the gill and mantle after exposure to nanoplastics.
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Direct and trophic exposure of polystyrene and environmental nanoplastics on Corbicula fluminea
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Researchers investigated the effects of both direct and trophic exposure routes to polystyrene and environmental nanoplastics on the freshwater bivalve Corbicula fluminea, assessing uptake and biological responses under ecologically relevant conditions.
Toxicity of environmental and polystyrene plastic particles on the bivalve Corbicula fluminea: focus on the molecular responses
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Researchers exposed freshwater bivalves to environmental microplastics and nanoplastics collected from a river, as well as to laboratory polystyrene nanoparticles, and measured molecular-level responses. Gene expression analysis revealed that plastic particle exposure activated stress response and immune defense pathways in gill and visceral tissues. The study indicates that even environmentally relevant concentrations of plastic particles can trigger measurable biological stress in filter-feeding organisms.
Toxicity of environmental and polystyrene plastic particles on the bivalve Corbicula fluminea: focus on the molecular responses
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Researchers exposed the freshwater bivalve Corbicula fluminea to standard polystyrene nanoplastics and environmentally derived micro- and nanoplastics at three concentrations, measuring gene expression in gills and visceral mass at 7 and 21 days. Major differences in oxidative stress, immunity, apoptosis, and neurotoxicity responses were found between the two particle types, demonstrating the importance of using environmentally realistic particles in ecotoxicological studies.
The stealthy journey of nanoplastics in bivalves: accumulation dynamics and toxic burden
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This review examined how bivalves' strong filter-feeding capacity leads to nanoplastic accumulation from surrounding water, covering accumulation dynamics, sub-lethal toxic effects across organ systems, and the implications for aquaculture food safety and bivalve-based environmental monitoring.
Microplastics effects in Scrobicularia plana
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Researchers exposed clams to polystyrene microplastics for 14 days and found that the particles accumulated in tissues and were not fully eliminated even after a week of depuration in clean water. The microplastics caused measurable oxidative damage, DNA damage, and neurotoxic effects in the clams. The study demonstrates that even short-term microplastic exposure can cause lasting biological harm in marine bivalves.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.