目的:研制葛根素固体自微乳制剂。方法:利用伪三元相图优化自微乳处方,并进行自微乳效率的研究,主要包括黏度、电导率、折光、zeta、粒径、稳定性,溶出度。结果:优化的葛根素固体自微乳处方为:葛根素-吐温80-甘油-油酸乙酯-水-微粉硅胶...目的:研制葛根素固体自微乳制剂。方法:利用伪三元相图优化自微乳处方,并进行自微乳效率的研究,主要包括黏度、电导率、折光、zeta、粒径、稳定性,溶出度。结果:优化的葛根素固体自微乳处方为:葛根素-吐温80-甘油-油酸乙酯-水-微粉硅胶-甘露醇的重量比为1.7∶16.6∶16.6∶1.3∶4.0∶39.9∶19.9,分散后平均粒径为30 nm,10 m in时的溶出度为94.29%。结论:所制葛根素固体自微乳稳定性好,溶出迅速。展开更多
Huperzine A(Hup-A) is a poorly water-soluble drug with low oral bioavailability. A selfmicroemulsifying drug delivery system(SMEDDS) was used to enhance the oral bioavailability and lymphatic uptake and transport of H...Huperzine A(Hup-A) is a poorly water-soluble drug with low oral bioavailability. A selfmicroemulsifying drug delivery system(SMEDDS) was used to enhance the oral bioavailability and lymphatic uptake and transport of Hup-A. A single-pass intestinal perfusion(SPIP) technique and a chylomicron flow-blocking approach were used to study its intestinal absorption, mesenteric lymph node distribution and intestinal lymphatic uptake. The value of the area under the plasma concentration–time curve(AUC) of Hup-A SMEDDS was significantly higher than that of a Hup-A suspension(P <0.01).The absorption rate constant(K_a) and the apparent permeability coefficient(P_(app)) for Hup-A in different parts of the intestine suggested a passive transport mechanism, and the values of K_a and P_(app) of Hup-A SMEDDS in the ileum were much higher than those in other intestinal segments. The determination of Hup-A concentration in mesenteric lymph nodes can be used to explain the intestinal lymphatic absorption of Hup-A SMEDDS. For Hup-A SMEDDS, the values of AUC and maximum plasma concentration(C_(max)) of the blocking model were significantly lower than those of the control model(P<0.05). The proportion of lymphatic transport of Hup-A SMEDDS and Hup-A suspension were about 40% and 5%,respectively, suggesting that SMEDDS can significantly improve the intestinal lymphatic uptake and transport of Hup-A.展开更多
文摘目的:研制葛根素固体自微乳制剂。方法:利用伪三元相图优化自微乳处方,并进行自微乳效率的研究,主要包括黏度、电导率、折光、zeta、粒径、稳定性,溶出度。结果:优化的葛根素固体自微乳处方为:葛根素-吐温80-甘油-油酸乙酯-水-微粉硅胶-甘露醇的重量比为1.7∶16.6∶16.6∶1.3∶4.0∶39.9∶19.9,分散后平均粒径为30 nm,10 m in时的溶出度为94.29%。结论:所制葛根素固体自微乳稳定性好,溶出迅速。
基金supported by the National Natural Science Foundation of China(Grant Nos.8127410081573615)+2 种基金Natural Science Foundation of Anhui Province of China(Grant No.1408085QH189)Key Project for the Excellent Higher Education of Anhui Province of China(Grant No.2013SQRL019ZD)Research Project for the Science and Technology of Bozhou city of China(Grant No.BK2015005)
文摘Huperzine A(Hup-A) is a poorly water-soluble drug with low oral bioavailability. A selfmicroemulsifying drug delivery system(SMEDDS) was used to enhance the oral bioavailability and lymphatic uptake and transport of Hup-A. A single-pass intestinal perfusion(SPIP) technique and a chylomicron flow-blocking approach were used to study its intestinal absorption, mesenteric lymph node distribution and intestinal lymphatic uptake. The value of the area under the plasma concentration–time curve(AUC) of Hup-A SMEDDS was significantly higher than that of a Hup-A suspension(P <0.01).The absorption rate constant(K_a) and the apparent permeability coefficient(P_(app)) for Hup-A in different parts of the intestine suggested a passive transport mechanism, and the values of K_a and P_(app) of Hup-A SMEDDS in the ileum were much higher than those in other intestinal segments. The determination of Hup-A concentration in mesenteric lymph nodes can be used to explain the intestinal lymphatic absorption of Hup-A SMEDDS. For Hup-A SMEDDS, the values of AUC and maximum plasma concentration(C_(max)) of the blocking model were significantly lower than those of the control model(P<0.05). The proportion of lymphatic transport of Hup-A SMEDDS and Hup-A suspension were about 40% and 5%,respectively, suggesting that SMEDDS can significantly improve the intestinal lymphatic uptake and transport of Hup-A.
