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Oligomer nanoparticle release from a biodegradable plastic triggers acute gut inflammation
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Researchers studying biodegradable polylactic acid microplastics found that gut lipases hydrolyze them into oligomers that self-assemble into nanoplastic particles, which then bioaccumulate in multiple mouse organs and trigger acute intestinal inflammation, raising concerns about the safety of biodegradable plastics.
Biodegradable polylactic acid (PLA) microplastics are shown to undergo enzymatic hydrolysis by lipases found in the human gut to generate PLA oligomers, which self-aggregate to form nanoplastic particles. The oligomers and their nanoparticles bioaccumulated in multiple organs of a mouse model and caused acute intestinal inflammation.
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Impact of Micro-nanoplastics on Gut and Immune Function
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This review examined how micro- and nanoplastics disrupt gut microbiota and immune function across aquatic and terrestrial vertebrates, with implications for human health. Because the gut microbiome governs immune regulation and metabolic health, microplastic-induced dysbiosis represents a plausible mechanism by which plastic ingestion could drive systemic inflammation and disease beyond the GI tract.
Microplastics and nanoplastics in human health: a comprehensive review of exposure pathways, cellular mechanisms, and toxicological implications
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Researchers reviewed human exposure pathways to microplastics and nanoplastics through seafood, salt, drinking water, inhalation, and skin contact, examining how these particles cross biological barriers to reach organs and trigger oxidative stress, inflammation, and endocrine disruption with poorly understood long-term consequences.
Microplastics and nanoplastics in the human gut: from signals to standards
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Researchers outlined major methodological gaps in current studies on microplastic and nanoplastic exposure through the human gastrointestinal tract, proposing minimum standards for study design and reporting to move the field from preliminary signals toward causal evidence linking gut plastic exposure to specific health outcomes.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.