Abstract
A water-in-oil-in-water (W/O/W) emulsion composed of oleic acid was used as a carrier of carboxyfluorescein (CF)via the enteral route, as a model for future drug transport. The absorption of CF in the small intestine of rats given the emulsion (W/O/W group) was compared with the absorption in a group administered CF alone (CF group), and a surface-active agent in CF solution (MM group). Higher amounts of CF were absorbed in the W/O/W and MM groups than in the CF group. At 120 min, the amount of CF remaining in the intestinal tract was smaller in the MM group than in the W/O/W group. In the early period, CF excretion into bile was higher in the MM group than in the W/O/W group was higher than in the MM group (non-specific). The blood CF level was significantly higher at 240 and 360 min in the W/O/W group than in the other two groups. The highest concentration in lymph was found in the W/O/W group. The W/O/W emulsion was considered superior to the micelles because it maintained a higher blood level of CF over long periods and transferred it to the lymph. This suggests that the W/O/W emulsion is applicable as a drug carriervia the enteral route.
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Abbreviations
- AUC:
-
area under the concentration-time curve
- CF:
-
carboxyfluorescein
- CMAX :
-
maximum concentration
- GE:
-
glycerol fatty acid ester
- Kel:
-
constant elimination rate
- MM:
-
mixed micelles
- PSM:
-
polyoxyethylene sorbitan monolaurate (Tween 20)
- t-MAX:
-
time of maximum concentration
- W/O/W:
-
water-in-oil-in-water
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Oba, N., Sugimura, H., Umehara, Y. et al. Evaluation of an oleic acid water-in-oil-in-water-type multiple emulsion as potential drug carriervia the enteral route. Lipids 27, 701–705 (1992). https://doi.org/10.1007/BF02536028
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DOI: https://doi.org/10.1007/BF02536028