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Enterohepatic Circulationof Polystyrene NanoplasticsPromotes Intestinal Inflammation by Impairing Enteric Neurons
AI summary Read the abstract
New research in mice found that tiny plastic particles (nanoplastics) don't just pass through your gut and leave — instead, once absorbed, they get sent to the liver, stored in the gallbladder, and recycled back into the intestines through bile, essentially getting trapped in a loop inside the body. This repeated exposure damaged the gut lining, disrupted healthy gut bacteria, and harmed the nerve cells that help control digestion, all of which drove inflammation. While this was shown in mice rather than humans, it suggests that everyday plastic exposure could build up and cause lasting gut damage in ways scientists h
Microplastics (MPs) are emerging contaminants of increasing concern, yet their in vivo fate and mechanisms of intestinal toxicity remain poorly defined. Here, we demonstrate that polystyrene nanoplastics (PS-NPs) undergo a previously overlooked enterohepatic recirculation pathway that markedly enhances their intestinal retention. Using oral exposure and a Zombie mouse model with intravenous PS-NPs delivery, we show that systemically absorbed PS-NPs are efficiently captured by the liver, concentrated in the gallbladder, and subsequently reintroduced into the intestine via bile. Chronic PS-NPs exposure caused pronounced epithelial injury, including goblet cell loss, tight-junction disruption, and robust cytokine-mediated inflammation. Multiomics analyses revealed gut microbial dysbiosis, extensive shifts in metabolite profiles, and enrichment of neuroactive signaling pathways, suggesting microbiome-metabolite contributions to toxicity. We further identified significant enteric neurotoxicity characterized by reduced expression of vasoactive intestinal peptide, increased expression of tyrosine hydroxylase, and downregulation of the mechanosensitive PIEZO1 channel. Together, these findings establish hepatobiliary recycling as a key driver of intestinal PS-NPs accumulation and demonstrate that epithelial damage, microbiome-metabolite imbalance, and enteric nervous system dysfunction collectively mediate PS-NPs-induced gut pathology. This work provides mechanistic insights essential for evaluating the health risks of environmental PS-NPs exposure.
More Papers Like This
Enterohepatic Circulationof Polystyrene NanoplasticsPromotes Intestinal Inflammation by Impairing Enteric Neurons
AI summary Read the abstract
New research in mice found that tiny plastic particles (nanoplastics) don't just pass through your gut—once absorbed, they get pulled into the liver and gallbladder, then recycled back into the intestines through bile, allowing them to build up over time instead of being cleared out. This repeated exposure damaged the gut lining, disrupted healthy gut bacteria, and harmed nerve cells that help control gut function, leading to inflammation. While this study was done in mice, it suggests that ongoing plastic exposure could have compounding effects on gut health that are worth taking seriously as we learn more about how microplastics affect the human
Enterohepatic Circulationof Polystyrene NanoplasticsPromotes Intestinal Inflammation by Impairing Enteric Neurons
AI summary Read the abstract
Scientists discovered that tiny plastic particles (nanoplastics) we swallow don't just pass through our gut once — they get absorbed into the liver, stored in the gallbladder, and then recycled back into the intestines through bile, allowing them to build up over time in mice. This repeated exposure damaged the gut lining, disrupted healthy gut bacteria, and harmed the nerves that control intestinal function, leading to inflammation. While this study was done in mice, it suggests that everyday plastic exposure could cause more lasting gut damage than previously thought, since our bodies may be unknowingly recirculating these partic
Enterohepatic Circulationof Polystyrene NanoplasticsPromotes Intestinal Inflammation by Impairing Enteric Neurons
AI summary Read the abstract
Scientists discovered that tiny plastic particles (nanoplastics) we swallow don't just pass through our gut and leave—they get absorbed, travel to the liver, get concentrated in bile, and get recycled back into the intestines, causing them to build up over time. In mice, this repeated exposure damaged the gut lining, disrupted healthy gut bacteria, and even harmed the nerve cells that help control digestion. This matters because it suggests plastic pollution in our food and water could cause more lasting gut damage than previously thought, since our bodies may be unintentionally recirculating these particles instead of clearing them out
Enterohepatic Circulationof Polystyrene NanoplasticsPromotes Intestinal Inflammation by Impairing Enteric Neurons
AI summary Read the abstract
Scientists discovered that tiny plastic particles (nanoplastics) we swallow don't just pass through our gut once—they get absorbed into the liver, stored in the gallbladder, then recycled back into the intestines through bile, essentially trapping the plastic in our digestive system for longer than expected. In mice, this repeated exposure damaged the gut lining, disrupted healthy gut bacteria, and harmed the nerves that control intestinal function, leading to inflammation. This matters because it suggests our bodies may have a built-in mechanism that keeps microplastics circulating and causing damage in the gut, rather
Enterohepatic Circulation of Polystyrene Nanoplastics Promotes Intestinal Inflammation by Impairing Enteric Neurons
AI summary Read the abstract
Scientists found that tiny plastic particles (nanoplastics) don't just pass through your gut once—your liver can absorb them from the bloodstream and recycle them back into your intestines through bile, meaning they linger in your body far longer than expected. In mice, this repeated exposure damaged the gut lining, disrupted healthy gut bacteria, and harmed nerve cells that control gut function, all of which fueled inflammation. This matters because it suggests the plastics we ingest daily may cause more lasting internal damage than previously thought, since our bodies may keep recirculating them instead of simply flushing them out.
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