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20 resultsShowing papers similar to Assessment of the Risk of Microplastics on Gill and Gut Health and Subsequent Pathogen Susceptibility in the Goldfish Model
ClearSize-dependent effects of microplastic on uptake, immune system, related gene expression and histopathology of goldfish (Carassius auratus)
Researchers exposed goldfish to two sizes of polystyrene microplastics at environmentally relevant concentrations for 28 days. The study found that microplastics accumulated in gill, liver, and intestine tissues, causing damage that worsened with smaller particle size and higher doses. The results indicate that microplastics trigger oxidative stress and immune responses in fish, with smaller particles posing greater health risks.
Effect of Polystyrene Microplastics on the Antioxidant System and Immune Response in GIFT (Oreochromis niloticus)
Researchers exposed farmed tilapia to polystyrene microplastics of various sizes and found that smaller particles caused more oxidative stress and stronger immune responses. Fish exposed to nanometer-sized plastics showed higher levels of reactive oxygen species and inflammatory markers compared to those exposed to larger particles. The study suggests that the size of microplastics matters significantly when evaluating their impact on fish health.
Exposure to microplastics impairs digestive performance, stimulates immune response and induces microbiota dysbiosis in the gut of juvenile guppy (Poecilia reticulata)
Researchers exposed juvenile guppies to polystyrene microplastics at two concentrations for 28 days and examined impacts on their digestive systems. The study found that microplastic exposure impaired digestive enzyme activity, stimulated intestinal immune responses, and disrupted the gut microbiota community, suggesting that microplastics can compromise intestinal health in freshwater fish.
Effects of Polystyrene Microplastics on Behavioural Response and Histopathology of Carassius auratus
Goldfish were exposed to 10 mg/L polystyrene microplastics for 28 days, after which researchers observed significant behavioral changes and histopathological damage in the gills and intestines. The findings suggest that even short-term PS microplastic exposure causes measurable organ damage in freshwater fish.
Polystyrene nano/microplastics induce microbiota dysbiosis, oxidative damage, and innate immune disruption in zebrafish
Researchers exposed zebrafish to polystyrene particles of two different sizes and found that both nano- and micro-sized plastics disrupted gut bacteria, caused oxidative damage, and altered immune responses. The severity of effects depended on particle size and concentration, with smaller particles and higher doses causing more harm. The study suggests that plastic particles in waterways may pose a broader threat to fish health than previously understood, affecting digestion, stress defenses, and immunity simultaneously.
Polystyrene microparticles can affect the health status of freshwater fish – Threat of oral microplastics intake
Researchers fed juvenile rainbow trout polystyrene microplastics at three dietary concentrations for six weeks and assessed multiple health parameters. They found that the highest concentration triggered immune responses, liver and gill damage, disrupted antioxidant balance, and reduced plasma proteins. The study demonstrates that oral microplastic intake can negatively affect the health of freshwater fish across multiple organ systems.
Microplastic exposure induces structural hyperplasia in the gill tissue of grass carp (Ctenopharyngodon idellus) through immunosuppression, metabolic disruption, and structural damage
Researchers examined how polystyrene microplastics affect the gill tissue of grass carp at two concentrations. They found that higher microplastic exposure caused significant structural damage to gills, activated inflammatory pathways, triggered oxidative stress, and promoted abnormal cell proliferation. The study suggests that microplastics can induce structural hyperplasia in fish gills through combined immunosuppression, metabolic disruption, and tissue damage mechanisms.
Concurrent impacts of polystyrene nanoplastic exposure and Aeromonas hydrophila infection on oxidative stress, immune response and intestinal microbiota of grass carp (Ctenopharyngodon idella)
Researchers studied the combined effects of polystyrene nanoplastics and a bacterial infection on grass carp, a common freshwater fish. They found that nanoplastic exposure worsened the impact of the infection by increasing oxidative stress, suppressing immune responses, and disrupting the gut microbiome. The study suggests that nanoplastic pollution in waterways could make fish more vulnerable to disease by weakening their natural defenses.
Evaluation of a chronic exposure to nanoplastics in goldfish (Carassius auratus): Analytical validation of automated assays for the measurement of biochemical markers
Researchers exposed goldfish to polystyrene nanoplastics for 30 days to study chronic effects on health biomarkers in gills, brain, and muscle. They found that nanoplastics primarily triggered immune and antioxidant stress responses in the gills — the fish's first point of contact — but caused no measurable effects in muscle, suggesting gills may be an early warning site for plastic particle toxicity in fish.
The effects of microplastics on autografts and allografts in Poecilia reticulata
This study found that polystyrene microplastics affect immune responses in guppies (small freshwater fish), specifically impairing transplanted tissue acceptance. The results suggest microplastic exposure can compromise fish immune systems in ways that may affect disease resistance and population health.
Adverse effects of polystyrene microplastics in the freshwater commercial fish, grass carp (Ctenopharyngodon idella): Emphasis on physiological response and intestinal microbiome
Researchers exposed grass carp to different sizes and concentrations of polystyrene microplastics for up to 14 days, followed by a depuration period, and assessed physiological and intestinal microbiome effects. The study found that microplastics caused histological damage, oxidative stress, and shifts in gut microbial communities, with smaller particles and higher concentrations producing more severe effects.
Histopathological Alterations in Gills, Liver and Kidneys of Goldfish (Carassius auratus) Exposed to Polystyrene Microplastics
Goldfish chronically exposed to 1 μm polystyrene microplastics at 1.53 mg/L for 28 days developed histopathological damage in gills, kidneys, and liver, including epithelial lifting, glomerular atrophy, and hepatocellular necrosis, demonstrating organ-level toxicity from chronic PS-MP exposure.
Impact of polystyrene microplastic exposure on gilthead seabream (Sparus aurata Linnaeus, 1758): Differential inflammatory and immune response between anterior and posterior intestine
Researchers fed gilthead seabream polystyrene microplastics for 21 days and found they triggered inflammation and immune disruption in both sections of the intestine, with the rear portion more severely affected. The microplastics activated inflammatory signaling pathways and weakened the gut barrier by reducing tight junction proteins. The findings suggest microplastic ingestion could compromise gut health and immune function in fish.
Microplastic exposure and consumption increases susceptibility to gyrodactylosis and host mortality for a freshwater fish
Researchers found that guppies exposed to polypropylene microplastics at environmentally relevant concentrations showed significantly higher parasite burdens and increased mortality from gyrodactylid infections, demonstrating that microplastics can compromise disease resistance in fish.
Size-dependent adverse effects of microplastics on intestinal microbiota and metabolic homeostasis in the marine medaka (Oryzias melastigma)
Researchers exposed marine medaka fish to different sizes of polystyrene microplastics for 60 days and found that particle size was a key factor in determining health effects. Larger particles (200 micrometers) caused weight gain and fat accumulation, while smaller particles (2 and 10 micrometers) led to liver inflammation and damage. The study also revealed that microplastics disrupted the balance of gut bacteria, particularly with larger particle exposure.
Polystyrene microplastics induce microbiota dysbiosis and inflammation in the gut of adult zebrafish
Researchers exposed adult zebrafish to polystyrene microplastics of two different sizes for 14 days and found significant disruptions to the gut microbiome, including shifts in key bacterial populations. Smaller microplastic particles also triggered inflammatory responses in the gut, with elevated levels of inflammatory markers at both the gene and protein level. The study suggests that microplastic ingestion can disturb gut bacteria balance and cause intestinal inflammation in aquatic organisms.
Microplastics induce transcriptional changes, immune response and behavioral alterations in adult zebrafish
Researchers exposed adult zebrafish to polyethylene and polystyrene microplastics for twenty days and analyzed the effects at the genetic, tissue, and behavioral levels. They found significant changes in immune system genes, disrupted intestinal and gill tissue integrity, and increased presence of inflammatory cells. The study suggests that microplastic exposure may compromise fish defenses against pathogens by weakening the protective barriers of their mucosal tissues.
Immunotoxicity of microplastics in fish
This review examines how microplastics damage the immune systems of fish, from harming their gills and organs to disrupting immune cell signaling and gene expression. Over time, microplastic exposure weakens fish immunity by killing immune cells and reducing their ability to fight off infections, with implications for the broader food chain that connects aquatic life to human diets.
Effects of virgin microplastics on goldfish (Carassius auratus)
Researchers fed goldfish three types of virgin microplastics — fibers, fragments, and pellets — for six weeks and observed significant weight loss, changes in gut tissue, and fiber accumulation in gills. The study suggests that different microplastic shapes cause different sub-lethal effects, with fibers appearing to be particularly problematic due to their tendency to entangle in tissues.
Effect of polystyrene microplastics on the antioxidant system and immune response in GIFT (Oreochromis niloticus)
Farmed tilapia exposed to polystyrene microplastics of different sizes showed elevated oxidative stress and immune inflammation markers, particularly in the brain, compared to unexposed fish. The findings suggest chronic microplastic exposure can impair immune defenses in commercially important freshwater fish, raising concerns for both aquaculture and wild fisheries.