Enhanced absorption of hydroxysafflor yellow A using a self-double-emulsifying drug delivery system: in vitro and in vivo studies
Liang-Zhong Lv,1 Chen-Qi Tong,1 Qing Lv,2,3 Xin-Jiang Tang,2 Li-Ming Li,2 Qing-Xia Fang,1 Jia Yu,1 Min Han,2 Jian-Qing Gao21Department of Pharmacy, Zhejiang Provincial People's Hospital, 2Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, 3Pharmaceutics...
Guardado en:
| Autores principales: | , , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Dove Medical Press
2012
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/6aaea2059d644d32acb3639f23f34f16 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | Liang-Zhong Lv,1 Chen-Qi Tong,1 Qing Lv,2,3 Xin-Jiang Tang,2 Li-Ming Li,2 Qing-Xia Fang,1 Jia Yu,1 Min Han,2 Jian-Qing Gao21Department of Pharmacy, Zhejiang Provincial People's Hospital, 2Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, 3Pharmaceutics Laboratory of TCM, ZheJiang Traditional Chinese Medicine University, Hangzhou, ChinaAbstract: Hydroxysafflor yellow A (HSYA), the main active ingredient of the safflower plant (Carthamus tinctorius L.), is a hydrophilic drug with low oral bioavailability. Water-in-oil-in-water (w/o/w) double emulsions may enhance the oral absorption of HSYA. In this study, we prepared a self-double-emulsifying drug delivery system (SDEDDS) to improve the absorption of HSYA. SDEDDS consists of water in oil emulsions and hydrophilic surfactants that can self-emulsify into w/o/w double emulsions in the aqueous gastrointestinal environment. Confocal laser scanning micrographs showed that spherical droplets were uniformly distributed in the dispersion medium with narrow particle size distribution and could form fine w/o/w double emulsions upon dilution in dispersion medium with gentle stirring. The dispersed oil droplets contained small dispersed aqueous droplets consistent with the characteristics of double emulsions. Furthermore, in vitro cellular experiments were performed to study the mechanism of the absorption promoting effect of SDEDDS. The accumulation of rhodamine-123 in Caco-2 cells was used to evaluate the efflux transport of p-glycoprotein inhibitor. Histopathologic studies on the rat intestine showed that SDEDDS can cause mucosal damage to a certain degree of toxicity, however this was not serious. These results suggest that SDEDDS can greatly improve the oral absorption of HSYA. Given the toxicity demonstrated to the small intestine, the formulation prescription should be improved to enhance security in the future.Keywords: self-double-emulsifying drug delivery system, hydroxysafflor yellow A, Caco-2 cells, bioavailability, histopathologic studies |
|---|