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Micro- and Nanoplastics in Inflammatory Bowel Disease: from Experimental Models to Human Evidence
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This review summarizes existing animal, human, and lab research on tiny plastic particles and inflammatory bowel disease. In healthy animals, plastic exposure alone caused mild or inconsistent gut changes, but in animals with chemically induced colitis, it worsened gut damage and inflammation. Human studies found higher plastic levels in feces of IBD patients, but evidence remains limited.
Research objectives: Micro- and nanoplastics (MNPs) are pervasive environmental contaminants that may affect gastrointestinal health. This narrative review aimed to evaluate current mechanistic, experimental, and human evidence concerning the potential relationship between MNP exposure and inflammatory bowel disease (IBD), including ulcerative colitis and Crohn’s disease. Methods: PubMed, Scopus, and Google Scholar were searched for human, animal, and in vitro studies investigating MNP exposure in IBD, experimental colitis, ileitis, intestinal inflammation, or mechanisms relevant to IBD pathogenesis. Studies addressing epithelial barrier dysfunction, mucus alterations, oxidative stress, immune activation, dysbiosis, and epithelial cell death were included. The evidence was synthesized descriptively because of substantial methodological heterogeneity. Key findings: Experimental studies indicate that MNPs can impair the intestinal mucus layer and epithelial junctions, increase permeability, promote oxidative and mitochondrial stress, activate inflammatory pathways, alter the gut microbiota and microbial metabolites, and disturb epithelial regeneration. In healthy animals, these effects were generally mild, subclinical, or inconsistent, and MNP exposure alone did not reliably produce an IBD-like phenotype. In contrast, most chemically induced colitis models showed greater mucosal injury, inflammation, permeability, delayed healing, fibrosis, or colitis-associated tumorigenesis after MNP exposure. Human studies reported higher fecal microplastic concentrations in IBD and associations with disease activity and Crohn’s disease-related fibrosis, but evidence remains limited. Conclusions: MNPs should currently be regarded as potential environmental modifiers of IBD rather than established etiological agents. Prospective studies using standardized exposure assessment and separate analyses of ulcerative colitis and Crohn’s disease are required to clarify causal relationships.
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This review paper summarizes research showing that tiny plastic particles from food and water may contribute to inflammatory bowel disease (IBD), a painful condition affecting the digestive system. Early studies suggest these microscopic plastics can damage the gut lining and trigger inflammation, though more research is needed to prove they directly cause IBD. Since plastic exposure can potentially be reduced, understanding this connection could lead to new ways to prevent or treat digestive diseases.
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This review pulls together what scientists currently know about tiny plastic particles (microplastics and nanoplastics) and their possible link to inflammatory bowel disease (IBD), a condition that causes chronic gut inflammation. Lab studies suggest these plastic particles could disrupt gut bacteria, damage the intestinal lining, and trigger immune responses—all things that matter in IBD—but so far there's no solid proof from human studies that plastics actually cause or worsen the disease. In short: the theory is plausible and worth watching, but we need better research before drawing firm conclusions about how the plastics in our food and environment
Analysis of Microplastics in Human Feces Reveals a Correlation between Fecal Microplastics and Inflammatory Bowel Disease Status
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Researchers analyzed microplastics in the stool of patients with inflammatory bowel disease (IBD) and healthy volunteers, finding that IBD patients had significantly higher concentrations of microplastics in their feces. PET plastic and polyamide were the most common types found, likely originating from food packaging and dust. The positive correlation between microplastic levels and IBD severity suggests that microplastic exposure may be linked to gut inflammation, though it is not yet clear whether the plastics contribute to the disease or the disease causes more plastic retention.
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