Biokinetics of food additive silica nanoparticles and their interactions with food components

Jeong A. Lee, Mi Kyung Kim, Jae Ho Song, Mi Rae Jo, Jin Yu, Kyoung Min Kim, Young Rok Kim, Jae Min Oh, Soo Jin Choi

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

Nanomaterials have been widely utilized in the food industry in production, packaging, sensors, nutrient delivery systems, and food additives. However, research on the interactions between food-grade nanoparticles and biomolecules as well as their potential toxicity is limited. In the present study, the in vivo solubility, oral absorption, tissue distribution, and excretion kinetics of one of the most extensively used food additives, silica (SiO2) were evaluated with respect to particle size (nano vs bulk) following single-dose oral administration to rats. Intestinal transport mechanism was investigated using a 3D culture system, in vitro model of human intestinal follicle-associated epithelium (FAE). The effect of the presence of food components, such as sugar and protein, on the oral absorption of nanoparticles was also evaluated with focus on their interactions. The results obtained demonstrated that the oral absorption of nanoparticles (3.94 ± 0.38%) was greater than that of bulk materials (2.95 ± 0.37%), possibly due to intestinal transport by microfold (M) cells. On the other hand, particle size was found to have no significant effect on in vivo dissolution property, biodistribution, or excretion kinetics. Oral absorption profile of silica nanoparticles was highly dependent on the presence of sugar or protein, showing rapid absorption rate in glucose, presumably due to their surface interaction on nanoparticles. These findings will be useful for predicting the potential toxicity of food-grade nanoparticles and for understanding biological interactions.

Original languageEnglish
Pages (from-to)384-392
Number of pages9
JournalColloids and Surfaces B: Biointerfaces
Volume150
DOIs
StatePublished - 1 Feb 2017

Keywords

  • Food component
  • Interaction
  • Intestinal transport
  • Oral absorption
  • Silica nanoparticles
  • Size effect
  • Surface interaction

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