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61,005 resultsShowing papers similar to Novel Characterization of Constipation Phenotypes in ICR Mice Orally Administrated with Polystyrene Microplastics
ClearInfluence of Microplastics on Morphological Manifestations of Experimental Acute Colitis
Researchers fed polystyrene microplastics to mice for six weeks and found that healthy mice developed changes in their colon lining, including altered mucus composition and immune cell populations. When mice with experimentally induced colitis also consumed microplastics, their intestinal inflammation was significantly more severe. The study suggests that microplastic exposure may worsen inflammatory bowel conditions.
Action mechanism as a cause of chronic constipation of inhaled and intravenously injected polystyrene nanoplastics in ICR mice
Researchers found that ICR mice inhaling 500 nm polystyrene nanoplastics for two weeks developed significant constipation symptoms — reduced GI motility, altered mucin secretion, and enteric nervous system disruption — demonstrating that inhaled nanoplastics can affect gut function.
Inflammatory response in the mid colon of ICR mice treated with polystyrene microplastics for two weeks
Researchers found that two weeks of oral polystyrene microplastic exposure in ICR mice induced an inflammatory response specifically in the mid colon, suggesting microplastics may contribute to colonic inflammation.
Polystyrene micro- and nanoplastics in a colitis mouse model – effects on biodistribution, macrophage polarization, and gut microbiome
Researchers exposed colitis mouse models to polystyrene micro- and nanoplastics to test whether MNP exposure worsens inflammatory bowel disease, finding that MNPs altered biodistribution and exacerbated inflammatory responses in animals with pre-existing gut inflammation.
Impacts of polystyrene microplastic on the gut barrier, microbiota and metabolism of mice
Researchers exposed mice to polystyrene microplastics for six weeks and found that the particles accumulated in the gut, reduced protective mucus secretion, and damaged the intestinal barrier. The microplastics also significantly altered the composition of gut bacteria, decreasing beneficial species and increasing harmful ones. The study suggests that microplastic ingestion could disrupt gut health in mammals by simultaneously impairing the physical barrier and reshaping the microbiome.
Long-Term Exposure to Environmentally Relevant Doses of Large Polystyrene Microplastics Disturbs Lipid Homeostasis via Bowel Function Interference
Researchers exposed mice to environmentally relevant doses of large polystyrene microplastics in their diet for 21 weeks and found significant disruptions to fat metabolism and gut bacterial communities. The microplastics interfered with bowel function, which in turn altered how the body processes and stores lipids. The study provides evidence that even low-level, long-term microplastic exposure through food may affect metabolic health in mammals.
Polystyrene micro- and nanoplastics aggravates colitis in a mouse model – effects on biodistribution, macrophage polarization, and gut microbiome
Researchers found that polystyrene micro- and nanoplastics aggravated colitis symptoms in a mouse model, increasing gut permeability, inflammatory cytokine levels, and tissue damage compared to controls. The study provides mechanistic evidence linking microplastic exposure to worsening of inflammatory bowel conditions.
Polystyrene micro- and nanoplastics in a colitis mouse model – effects on biodistribution, macrophage polarization, and gut microbiome
Researchers induced colitis in mice using dextran sodium sulfate and orally administered polystyrene micro- and nanoplastics of three sizes, then tracked biodistribution, macrophage polarization, and gut microbiome changes. In colitis conditions, microplastic uptake into systemic tissues was enhanced, macrophages shifted toward a pro-inflammatory phenotype, and gut microbial diversity decreased, suggesting that inflammatory bowel disease increases vulnerability to microplastic-driven systemic harm.
Polystyrene microplastics induce gut microbiota dysbiosis and hepatic lipid metabolism disorder in mice
Researchers fed mice two sizes of polystyrene microplastics for five weeks and observed significant disruption of gut bacteria and changes in liver fat metabolism. The microplastics decreased mucus production in the gut and shifted the balance of key bacterial populations at multiple taxonomic levels. The study suggests that microplastic ingestion can trigger gut microbiota imbalance in mammals, which may in turn affect metabolic health.
Oral exposure to high concentrations of polystyrene microplastics alters the intestinal environment and metabolic outcomes in mice
In a mouse study, oral exposure to high concentrations of polystyrene microplastics caused fatty liver disease and abnormal blood lipid levels even without prior gut leakiness. The microplastics triggered intestinal inflammation through immune cells, disrupted gut bacteria, and altered how the body processes nutrients. These results suggest that swallowing microplastics could contribute to metabolic problems and liver disease in humans.
Negative impact of oral exposure to polystyrene microplastics on glucose tolerance and intestinal environment in mice is independent of particle size
Researchers fed mice on a high-fat diet polystyrene microplastics of three different sizes and found that all sizes impaired glucose tolerance, regardless of particle dimensions. The microplastics caused intestinal inflammation, altered gut bacteria, and damaged the lining of the intestinal tract. The study suggests that the harmful metabolic effects of ingesting microplastics may occur broadly and are not limited to one particular particle size.
Polystyrene micro- and nanoplastics in a colitis mouse model – effects on biodistribution, macrophage polarization, and gut microbiome
Researchers studied the effects of polystyrene micro- and nanoplastics in a mouse model of colitis, examining biodistribution, immune cell responses, and gut microbiome changes. The study found that nanosized particles in particular showed distinct biodistribution patterns and affected macrophage polarization under inflammatory conditions, suggesting that intestinal inflammation may alter how the body handles micro- and nanoplastic particles.
Assessment of the Toxicity of Polystyrene Microplastic in the Colon and Liver of Adult NMRI Mice
Researchers orally administered polystyrene microplastics to adult male mice at four doses for four weeks and examined histological changes in the colon and liver. Both organs showed dose-dependent tissue damage including inflammation and oxidative stress markers, with the colon showing earlier onset injury due to direct contact with ingested particles.
Gut Check: Microbiota and Obesity in Mice Exposed to Polystyrene Microspheres
Researchers found that gut microbiota appeared to play a mediating role in the obesity outcomes observed in mice fed manufactured polystyrene microspheres, suggesting that microplastic-induced alterations to the gut microbiome may be a mechanism linking microplastic exposure to metabolic dysfunction and weight gain.
Microplastic effects on mouse colon in normal and colitis conditions: A literature review
This literature review examined studies on how microplastic exposure affects the mouse colon under both normal and inflammatory conditions. Evidence indicates that microplastics may contribute to intestinal inflammation and could worsen existing colitis. The review highlights the need for further research to better understand how microplastic ingestion may influence gut health in humans.
Microplastic consumption induces inflammatory signatures in the colon and prolongs a viral arthritis
Mice that consumed low doses of polystyrene microplastics showed signs of colon inflammation and experienced prolonged viral arthritis symptoms. The results suggest that microplastic ingestion may worsen inflammatory conditions, though more research is needed to confirm human relevance.
Oral exposure to polyethylene microplastics alters gut morphology, immune response, and microbiota composition in mice
Researchers fed mice polyethylene microplastics of two sizes commonly found in human stool for six weeks and examined the effects on gut health. The study found that microplastic exposure altered gut structure, disrupted immune cell function, changed gene expression related to inflammation and gut barrier integrity, and shifted the composition of gut bacteria. Mice exposed to both sizes simultaneously showed the most severe effects, suggesting that real-world exposure to mixed microplastic sizes may compound the damage.
Polyethylene microplastics affect the distribution of gut microbiota and inflammation development in mice
Researchers fed mice different concentrations of polyethylene microplastics for five weeks and found significant changes in gut bacteria composition and signs of intestinal inflammation. Higher doses increased bacterial diversity and altered the balance of specific bacterial species, while triggering immune responses and inflammation in the colon and duodenum. The study provides evidence that microplastic ingestion can disrupt the gut microbiome and promote intestinal inflammation in mammals.
Effects induced by polyethylene microplastics oral exposure on colon mucin release, inflammation, gut microflora composition and metabolism in mice
Researchers fed mice polyethylene microplastics for 30 days and found that even low doses reduced protective mucus in the colon, altered inflammation markers, and shifted the composition of gut bacteria. The microplastics increased the ratio of Bacteroides to Firmicutes bacteria and affected metabolic pathways in the gut microbiome. The study suggests that oral microplastic exposure may disrupt intestinal health by modifying the gut microbial community and its metabolism.
Polystyrene microplastics trigger adiposity in mice by remodeling gut microbiota and boosting fatty acid synthesis
Researchers discovered that polystyrene microplastics at relatively low concentrations caused weight gain and excess fat accumulation in mice by reshaping their gut bacteria. The altered gut microbiome boosted fatty acid production, increased appetite, and lowered physical activity in the exposed mice. This finding is significant because it suggests everyday levels of microplastic exposure could contribute to obesity through changes in gut bacteria and metabolism.
Ingested nano- and microsized polystyrene particles surpass the intestinal barrier and accumulate in the body
Researchers fed mice nano- and microsized polystyrene particles for up to 24 weeks to study intestinal barrier crossing and accumulation. The study found that plastic particles accumulated in the small intestine and distant organs, though they did not promote intestinal inflammation or worsen colitis, while noting that long-term accumulative effects on gastrointestinal health cannot be ruled out.
Microplastics’ Impact on the Development of AOM/DSS-Induced Colitis-Associated Colorectal Cancer in Mice
Researchers used a mouse model of colitis-associated colorectal cancer and found that chronic polystyrene microplastic exposure (1.48 mg/kg/day for 12 weeks) increased tumor nodule number and promoted cancer development, providing experimental evidence linking microplastic ingestion to colorectal carcinogenesis.
Influence of Microplastics on Manifestations of Experimental Chronic Colitis
Researchers studied whether consuming microplastics worsens chronic colon inflammation in mice. While microplastics alone did not cause visible damage to healthy intestines, they significantly increased the severity of colitis symptoms, including more ulcers and greater inflammatory cell infiltration, in mice with pre-existing colon inflammation. The findings suggest that microplastic exposure may be particularly concerning for individuals who already have inflammatory bowel conditions.
Polystyrene microplastic exposure induces insulin resistance in mice via dysbacteriosis and pro-inflammation
Researchers found that exposing mice to polystyrene microplastics induced insulin resistance regardless of whether the animals were on a normal or high-fat diet. The study identified disruption of gut bacteria and increased intestinal inflammation as key mechanisms driving the metabolic changes. These findings suggest that microplastic exposure may contribute to metabolic health issues by altering the gut microbiome and triggering chronic inflammation.