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- W1985305655 abstract "Oral vaccination is one of the most promising applications of polymeric nanoparticles. Using two different in vitro cellular models to partially reproduce the characteristics of intestinal enterocytes and M-cells, this study demonstrates that nanoparticle transport through the M-cell co-culture model is 5-fold that of the intestinal epithelial monolayer, with at least 80% of the chitosan–DNA nanoparticles uptaken in the first 30 min. Among the properties of nanoparticles studied, ligand decoration has the most dramatic effect on the transcytosis rate: transferrin modification enhances transport through both models by 3- to 5-fold. The stability of the nanoparticles also affects transport kinetics. Factors which de-stabilize the nanoparticles, such as low charge (N/P) ratio and addition of serum, result in aggregation and in turn decreases transport efficiency. Of these stability factors, luminal pH is of great interest as an increase in pH from 5.5 to 6.4 and 7.4 leads to a 3- and 10-fold drop in nanoparticle transport, respectively. Since soluble chitosan can act as an enhancer to increase paracellular transport by up to 60%, this decrease is partially attributed to the soluble chitosan precipitating near neutral pH. The implication that chitosan–DNA nanoparticles are more stable in the upper regions of the small intestine suggests that higher uptake rates may occur in the duodenum compared to the ileum and the colon." @default.
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- W1985305655 date "2010-01-01" @default.
- W1985305655 modified "2023-10-17" @default.
- W1985305655 title "Transport of chitosan–DNA nanoparticles in human intestinal M-cell model versus normal intestinal enterocytes" @default.
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- W1985305655 doi "https://doi.org/10.1016/j.ejps.2009.11.002" @default.
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