We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Plastic Microfibers Impact the Immune System of the Pacific Oyster
ClearMicrofiber Content in Pacific Oysters (Crassostrea gigas) from Morro Bay, California
Researchers measured microfiber contamination in Pacific oysters (Crassostrea gigas) from Morro Bay, California, to assess exposure levels in a commercially important shellfish species. Microfibers were detected in oysters across sampling sites, with concentrations varying by location and season, indicating consistent exposure to synthetic fiber pollution in this coastal environment.
Do Environmentally Relevant Concentrations of Microplastics Pose a Threat to the Eastern Oyster, Crassostrea Virginica?
This study exposed eastern oysters to polyester microfibers at environmentally realistic concentrations for 45 days, finding that even low doses affected their physiology including feeding, growth, and energy use. The results suggest that ecologically relevant microplastic levels may pose a threat to commercially important filter-feeding shellfish.
Cellular Bioreactivity of Micro- and Nano-Plastic Particles in Oysters
Polystyrene nano (50 nm) and micro (3 μm) beads were exposed to Eastern oysters and internalization into cells was evaluated, finding that both particle sizes were taken up by hemocytes (immune cells) with nanoparticles reaching intracellular locations more effectively than microparticles. The study provides cellular-level evidence that nanoplastics can penetrate oyster immune cells, raising concern about immunological disruption in commercially important shellfish.
Single and repetitive microplastics exposures induce immune system modulation and homeostasis alteration in the edible mussel Mytilus galloprovincialis
Researchers examined transcriptome-wide gene expression changes in Mediterranean mussels after single and repeated microplastic exposures, finding significant immune system modulation and disruption of cellular homeostasis. The study suggests that both short-term and chronic microplastic exposure can alter immune regulation pathways in filter-feeding bivalves, with repeated exposures showing cumulative effects.
Exposure to plastic debris alters expression of biomineralization, immune, and stress-related genes in the eastern oyster (Crassostrea virginica)
Researchers exposed eastern oysters to plastic debris during their first year of life and then analyzed changes in gene activity using RNA sequencing. They found that plastic exposure altered the expression of genes involved in shell building, immune response, and stress management. The study suggests that chronic contact with degrading plastics in the ocean can disrupt multiple biological processes in shellfish.
Microplastics induce dose-specific transcriptomic disruptions in energy metabolism and immunity of the pearl oyster Pinctada margaritifera
Pearl oysters (Pinctada margaritifera) exposed to three doses of polystyrene microbeads showed dose-dependent reductions in energy balance, and transcriptomic analysis revealed disruptions to pathways controlling immunity and energy metabolism that scaled with exposure concentration.
Metabolic profiles and protein expression responses of Pacific oyster (Crassostrea gigas) to polystyrene microplastic stress
Researchers exposed Pacific oysters to polystyrene microplastics for 21 days and found the particles caused oxidative stress and disrupted the oysters' metabolism, particularly amino acid processing. Different microplastic concentrations triggered different metabolic changes in the oysters. Since oysters are a popular seafood, these findings raise questions about food safety and whether microplastic-stressed shellfish could affect consumer health.
Impact of nanoplastics on hemolymph immune parameters and microbiota composition in Mytilus galloprovincialis
Mytilus galloprovincialis mussels exposed to amino-modified polystyrene nanoplastics for 96 hours showed disrupted hemolymph immune parameters and significant shifts in microbiota composition, suggesting nanoplastics alter both immune function and the microbial communities mussels rely on.
The stress-immunity axis in shellfish.
This review examines the stress-immunity relationship in shellfish, covering how environmental stressors — including chemical contaminants like microplastics — activate immune responses and affect shellfish health. Since shellfish are consumed by humans and accumulate microplastics from the water they filter, understanding how plastic pollution stresses these animals is important for seafood safety.
Mucus Production as a Strategy of Oysters Against Synthetic Textile Microfibers
Researchers found that oysters exposed to synthetic textile microfibers responded by producing elevated levels of protective mucus in their mantle tissue. This mucus response represents a physiological defense mechanism against microplastic ingestion but may incur energetic costs to the organism.
Ingestion and depuration of polyester microfibers by Crassostrea gasar (Adanson, 1757).
Researchers exposed the oyster Crassostrea gasar to environmentally sourced polyester microfibers at 0.5 mg/L and found accumulation in gill and digestive gland tissues, with evidence of clearance after a depuration period, raising concerns about microfiber effects on bivalve aquaculture.
Differential sensitivity of hemocyte subpopulations (mytilus edulis) to aged polyethylene terephthalate micro-and-nanoplastic particles
This study examined how different hemocyte populations in Mytilus edulis mussels respond to aged polystyrene microplastics, finding that granulocytes and hyalinocytes differ in their sensitivity. The results improve understanding of how microplastic exposure impairs bivalve immune function.
Effects of microplastics on gene expression to nonspecific immune system in pacific white shrimp (Litopenaeus vannamei).
This study found that high-density polyethylene microplastic particles in shrimp feed suppressed immune defense genes in Pacific white shrimp and caused intestinal and gill tissue damage at concentrations well below lethal levels. The findings suggest that microplastic exposure could compromise immune function and health in farmed crustaceans.
Microplastic Contamination in Pacific Oysters (Crassostrea gigas) from Haizhou Bay: Tissue-Specific Distribution, Digestive Enzyme Dysfunction, and Lipid Metabolism Perturbation
This study systematically evaluated microplastic distribution in Pacific oysters from Haizhou Bay, China, finding MP contamination across all tissues examined and documenting that MP accumulation altered digestive enzyme activities and fatty acid metabolism in these commercially harvested shellfish.
Impact of polyester and cotton microfibers on growth and sublethal biomarkers in juvenile mussels
Researchers exposed juvenile mussels to polyester and cotton microfibers at realistic ocean concentrations for 94 days and found that polyester microfibers reduced mussel growth rates by up to 36%, suggesting that microplastic fiber pollution could harm marine ecosystems and threaten shellfish aquaculture.
Environmental and Sublethal Concentrations of Polystyrene Nanoplastics Induced Antioxidant System, Transcriptomic Responses, and Disturbed Gut Microbiota in Oyster Magallana Hongkongensis
Researchers exposed Hong Kong oysters to polystyrene nanoplastics at both environmentally realistic and higher concentrations. Even at the lower, real-world concentrations, the nanoplastics significantly altered the oysters' gut bacteria and gene expression patterns, while higher doses also triggered immune and antioxidant stress responses, raising concerns about food safety and ecosystem health.
Are microplastics impacting shellfish?
Researchers investigated whether microplastic contamination measurably impacts shellfish physiology, growth, reproduction, and health outcomes, assessing the ecological and food safety implications of microplastic exposure in commercially and ecologically important bivalve species.
Effects of Microplastics Associated with Triclosan on the Oyster Crassostrea brasiliana: An Integrated Biomarker Approach
Brazilian oysters (Crassostrea brasiliana) were exposed to microplastics alone and in combination with the antibacterial chemical triclosan, with combined exposure causing greater oxidative stress, immune disruption, and genotoxicity than either stressor alone.
Pollution in marine bivalves: The immunosuppressive effects of microplastics on Anadara granosa
Researchers exposed blood clams to polystyrene microplastics for one week and found that the plastics suppressed their immune system in a dose-dependent manner. Higher microplastic concentrations reduced the clams' immune cell counts, hemoglobin, and disease-fighting enzymes. Since blood clams are a commercially harvested seafood species, weakened immunity could increase disease outbreaks in clam populations and potentially affect the safety of shellfish consumed by humans.
Realistic environmental exposure to microplastics does not induce biological effects in the Pacific oyster Crassostrea gigas
Pacific oysters were exposed to environmentally relevant concentrations of polyethylene and polypropylene fragments for 10 days followed by depuration, with microplastics detected in tissues but no significant effects on clearance rate, tissue integrity, antioxidant defense, or DNA damage. The results suggest that realistic environmental concentrations of these larger fragments may not cause measurable biological harm to oysters.
Microplastics exposure in European flat oyster, Ostrea edulis: Evaluation of accumulation and depuration under controlled conditions and molecular assessment of a set of reference genes
Researchers evaluated microplastic accumulation and effects in European flat oysters under controlled exposure conditions, examining how filter feeding concentrates plastic particles and whether ingestion impairs oyster health. Exposure resulted in measurable microplastic accumulation in oyster tissue, with effects observed on feeding behavior and physiological condition.
Microplastics and low tide warming: Metabolic disorders in intertidal Pacific oysters (Crassostrea gigas)
Researchers exposed Pacific oysters to environmentally relevant concentrations of microplastics during a simulated tidal cycle and then subjected them to warming during low tide. They found that microplastic exposure disrupted the oysters' metabolism and made them more vulnerable to heat stress, with effects worsening over time even at very low particle concentrations. The study suggests that microplastic pollution may reduce the ability of intertidal shellfish to cope with rising temperatures.
Microplastic concentrations in cultured oysters in two seasons from two bays of Baja California, Mexico
Researchers measured microplastic concentrations in cultured Pacific oysters from two bays in Baja California, Mexico, across winter and summer seasons. Microfibers were the most abundant particle type found in all samples, with higher concentrations observed during winter. The study suggests that seasonal and spatial factors influence microplastic accumulation in farmed shellfish, which is relevant given that oysters are consumed whole by humans.
Polyester Microfibers Exposure Modulates Mytilus galloprovincialis Hemolymph Microbiome
Researchers exposed Mediterranean mussels to polyester microfibers and found that the fibers significantly altered the microbial communities in the mussels' circulatory fluid. The changes in the microbiome could potentially affect the mussels' immune function and overall health. The findings suggest that microfiber pollution in the ocean may disrupt the delicate balance between marine organisms and their beneficial bacteria.