期刊
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS
卷 1840, 期 3, 页码 1171-1180出版社
ELSEVIER
DOI: 10.1016/j.bbagen.2013.12.014
关键词
Nanomaterial; Silica particle; In vitro model; Simulated gastrointestinal fluid
资金
- Health and Labour Sciences Research Grants from the Ministry of Health, Labour and Welfare of Japan
Background: Amorphous silica particles with the primary dimensions of a few tens of nm, have been widely applied as additives in various fields including medicine and food. Especially, they have been widely applied in powders for making tablets and to coat tablets. However, their behavior and biological effects in the gastrointestinal tracts associated with oral administration remains unknown. Methods: Amorphous silica particles with diameters of 50, 100, and 200 nm were incubated in the fasted-state and fed-state simulated gastric and intestinal fluids. The sizes, intracellular transport into Caco-2 cells (model cells for intestinal absorption), the Caco-2 monolayer membrane permeability, and the cytotoxicity against Caco-2 cells were then evaluated for the silica particles. Results: Silica particles agglomerated in fed-state simultaneous intestinal fluids. The agglomeration and increased particles size inhibited the particles' absorption into the Caco-2 cells or particles' transport through the Caco-2 cells. The in vitro cytotoxicity of silica particles was not observed when the average size was larger than 100 nm, independent of the fluid and the concentration. Conclusion: Our study indicated the effect of diet on the agglomeration of silica particles. The sizes of silica particles affected the particles' absorption into or transport through the Caco-2 cells, and cytotoxicity in vitro, depending on the various biological fluids. General significance: The findings obtained from our study may offer valuable information to evaluate the behavior of silica particles in the gastrointestinal tracts or safety of medicines or foods containing these materials as additives. (C) 2013 Elsevier B.V. All rights reserved.
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