Integrated Analysis of Oxidative Stress, Neurotransmitter Dynamics, Enzymatic Activity, and Metabolomics in Pearl Oyster Pinctada Fucata Martensii Exposed to Pvc Nanoplastics and Hyposalinity

The impacts of PVC microplastics on physiology and transcriptomic responses of pearl oyster Pinctada fucata martensii

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Pearl oysters (Pinctada fucata martensii) exposed to PVC microplastics for 10 days showed elevated superoxide dismutase activity and significant transcriptomic changes across multiple biological pathways, with oxidative stress partially reversing during a 6-day recovery period. The disruption of antioxidant defenses and broad gene expression changes in commercially farmed oysters at environmentally relevant PVC concentrations raises concerns about microplastic impacts on aquaculture productivity and the safety of shellfish consumed by humans.

Muti-Biomarker Approach and IBR Index to Evaluate the Oxidative Stress of Nanoplastic on the Clams, Meretrix meretrix and Sinonovacula constricta

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Researchers exposed two clam species to polystyrene nanoplastics and measured antioxidant enzyme responses across multiple tissues, finding that oxidative stress patterns varied by species, organ, dose, and time, with gills showing the highest sensitivity and damage levels returning to baseline after a recovery period.

Nanoplastic exposure alters oxidative stress, immunity, and digestive function in Pinctada fucata martensii

Molecular and cellular effects of nano- and microplastics on oysters: a review

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Researchers reviewed the ecotoxicological effects of nano- and microplastics on oysters, finding that while high concentrations cause measurable physiological and cellular harm, there is a critical lack of studies at environmentally realistic exposure levels needed to accurately predict ecological consequences.

What Can Model Polystyrene Nanoparticles Can Teach Us on the Impact of Nanoplastics in Bivalves? Studies in Mytilus from the Molecular to the Organism Level

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Researchers used model polystyrene nanoparticles to study how nanoplastics affect mussels at the molecular and whole-organism level, shedding light on the potential harm of plastic particles smaller than one micrometer. Because nanoplastics can penetrate cells more easily than larger microplastics, these findings suggest they may pose distinct biological risks to aquatic life and potentially humans.