4.8 Article

Incineration-Generated Polyethylene Micro-Nanoplastics Increase Triglyceride Lipolysis and Absorption in an In Vitro Small Intestinal Epithelium Model

期刊

ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 56, 期 17, 页码 12288-12297

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.est.2c03195

关键词

plastics; incineration; microplastics; nanoplastics; micro-nanoplastics; polyethylene; ingestion; fat digestion; fat absorption

资金

  1. National Institute of Environmental Health Sciences of the National Institutes of Health [U24ES026946]
  2. Nanotechnology Health Implications Research (NHIR)
  3. NIEHS [T32ES026946]
  4. NIH [S10 OD010669]
  5. Rutgers NIEHS Center for Environmental Exposure and Diseases (CEED) [P30 ES005022]

向作者/读者索取更多资源

Despite the lack of knowledge on the health risks and impact on nutrient digestion and absorption of ingested micro-nanoplastics, this study found that the presence of polyethylene incineration-generated nanoparticles increased fat digestion and absorption. The analysis revealed a potential mechanism of triacylglycerol digestion by lipase on the surface of lipid-coated nanoparticles. Further research is needed to explore the underlying mechanisms and verify the results in animal models.
Despite mounting evidence of micro-nanoplastics (MNPs) in food and drinking water, little is known of the potential health risks of ingested MNPs, and nothing is known of their potential impact on nutrient digestion and absorption. We assessed the effects of environmentally relevant secondary MNPs generated by incineration of polyethylene (PE-I), on digestion and absorption of fat in a high fat food model using a 3-phase in vitro simulated digestion coupled with a tri-culture small intestinal epithelium model. The presence of 400 mu g/mL PE-I increased fat digestion by 33% and increased fat absorption by 147 and 145% 1 and 2 h after exposure. Analysis of the PE-I lipid corona during digestion revealed predominantly triacylglycerols with enrichment of fatty acids in the small intestinal phase. Protein corona analysis showed enrichment of triacylglycerol lipase and depletion of beta-casein in the small intestinal phase. These findings suggest digestion of triacylglycerol by lipase on the surface of lipid-coated MNPs as a potential mechanism. Further studies are needed to investigate the mechanisms underlying the greater observed increase in fat absorption, to verify these results in an animal model, and to determine the MNP properties governing their effects on lipid digestion and absorption.

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