Abstract
A positively charged self-emulsifying oil formulation (SEOF), aimed to enhance oral bioavailability of drugs poorly soluble in water, was recently developed. In the present study the Caco-2 cell model was used for the investigation of the charge-dependent interactions of this SEOF with human intestinal epithelial cells. The positively charged emulsions affected the barrier properties of the cell monolayer at high concentrations and reduced the cell viability. However, at the dilution with aqueous phase used in the present study (1:2000), the positively charged SEOF did not induce any detectable cytotoxic effect. The binding of the fluorescent dye DiIC18(3) was much higher from the positively charged SEOF, compared to the negatively charged formulation, suggesting an increased closer adhesion of the droplets to the cell surface due to the electrostatic attraction. No transepithelial transport of this compound across Caco-2 cell monolayers was observed with any SEOF formulation.
Original language | English |
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Pages (from-to) | 29-36 |
Number of pages | 8 |
Journal | International Journal of Pharmaceutics |
Volume | 211 |
Issue number | 1-2 |
DOIs | |
State | Published - 15 Dec 2000 |
Keywords
- Barrier function
- Binding study
- Caco-2 cells
- Emulsion
- Fluorescent dye
- Self-emulsifying