目的研究一种全新合成的抗抑郁药物AJS的自微乳化制剂(AJS-SMEDDS)的理化性质和体外释药行为。方法考察AJS-SMEDDS制剂的黏度、zeta电位和粒度,研究其流变学性质及电学性质;采用总体液平衡反向透析法测定其体外释药性能;并考察了其稳定...目的研究一种全新合成的抗抑郁药物AJS的自微乳化制剂(AJS-SMEDDS)的理化性质和体外释药行为。方法考察AJS-SMEDDS制剂的黏度、zeta电位和粒度,研究其流变学性质及电学性质;采用总体液平衡反向透析法测定其体外释药性能;并考察了其稳定性。结果 AJS-SMEDDS制剂为塑性流体,在分散介质中所形成的乳滴zeta电位为-2.76 m V,粒径为(26.08±1.68)nm,制剂质量稳定,低温不影响其性能。结论 AJSSMEDDS制剂质量稳定,适合工业生产。展开更多
The aim of present study was to formulate and evaluate a self-microemulsifying drug delivery systems(SMEDDS)containing lovastatin and to further explore the ability of porous Neusilin■ US2 tablet as a solid carrier f...The aim of present study was to formulate and evaluate a self-microemulsifying drug delivery systems(SMEDDS)containing lovastatin and to further explore the ability of porous Neusilin■ US2 tablet as a solid carrier for SMEDDS.SMEDDS formulations of varying proportions of peceol,cremophor RH 40 and transcutol-P were selected and subjected to invitro evaluation,including dispersibility studies,droplet size,zeta potential measurement and release studies.The results indicated that the drug release profile of lovastatin from SMEDDS formulations was statistically significantly higher(p-value<0.05)than the plain lovastatin powder.Thermodynamic stability studies also confirmed the stability of the prepared SMEDDS formulations.The optimized formulation,which consists of 12% of peceol,44% of cremophor RH 40,and 44% of transcutol-P was loaded into directly compressed liquid loadable tablet of Neusilin■ US2 by simple adsorption method.In order to determine the ability of Neusilin®US2 as a suitable carrier pharmacodynamics study were also carried out in healthy diet induced hyperlipidemic rabbits.Animals were administered with both liquid SMEDDS and solid SMEDDS as well.From the results obtained,Neusilin■ was found to be a suitable carrier for SMEDDS and was equally effective in reducing the elevated lipid profile.In conclusion,liquid loadable tablet(LLT)is predicted to be a promising technique to deliver a liquid formulation in solid state.展开更多
目的筛选葛根素自微乳的处方。方法通过药物溶解度实验和伪三元相图的绘制,以粒径大小和分布为指标,筛选油相、乳化剂、助乳化剂的处方配比。测定葛根素自微乳释药系统的溶出度。结果确定的葛根素自微乳处方比例为葛根素∶油酸聚乙醇甘...目的筛选葛根素自微乳的处方。方法通过药物溶解度实验和伪三元相图的绘制,以粒径大小和分布为指标,筛选油相、乳化剂、助乳化剂的处方配比。测定葛根素自微乳释药系统的溶出度。结果确定的葛根素自微乳处方比例为葛根素∶油酸聚乙醇甘油酯(labrafil M 1944CS)∶聚氧乙烯氢化蓖麻油(RH-40)∶聚乙二醇400(PEG 400)=9.1%∶36.4%∶36.4%∶18.1%。结论通过研究确定了最优化的葛根素自微乳处方,微乳粒径分布均匀。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
目的探索卤泛群自微乳给药系统(halofantrine self-microemulsifying drug delivery system,HF-SMEDDS)通过改善淋巴转运增加HF口服生物利用度的可能性。方法以亚油酸乙酯为油相,吐温80为乳化剂,无水乙醇为助乳化剂,制备并筛选HF-SMEDD...目的探索卤泛群自微乳给药系统(halofantrine self-microemulsifying drug delivery system,HF-SMEDDS)通过改善淋巴转运增加HF口服生物利用度的可能性。方法以亚油酸乙酯为油相,吐温80为乳化剂,无水乙醇为助乳化剂,制备并筛选HF-SMEDDS处方,以油相和混合乳化剂(吐温80和无水乙醇)的比例及乳化剂与助乳化剂的比例为考察因素,以静脉给药组为对照,以二插管大鼠为动物模型,考察不同HF-SMEDDS处方口服给药后在大鼠体内的生物利用度。结果9组处方HF-SMEDDS粒径分布在20.6~336.5 nm,经淋巴转运药量可达到总给药量的2.25%~19.6%。结论HF-SMEDDS能有效提高药物的生物利用度,为HF口服制剂开发提供一定研究思路与基础。展开更多
文摘目的研究一种全新合成的抗抑郁药物AJS的自微乳化制剂(AJS-SMEDDS)的理化性质和体外释药行为。方法考察AJS-SMEDDS制剂的黏度、zeta电位和粒度,研究其流变学性质及电学性质;采用总体液平衡反向透析法测定其体外释药性能;并考察了其稳定性。结果 AJS-SMEDDS制剂为塑性流体,在分散介质中所形成的乳滴zeta电位为-2.76 m V,粒径为(26.08±1.68)nm,制剂质量稳定,低温不影响其性能。结论 AJSSMEDDS制剂质量稳定,适合工业生产。
基金International Medical University(IMU),Malaysia for financially supporting the present work under the research grant number BPharm B0108_Res322011.
文摘The aim of present study was to formulate and evaluate a self-microemulsifying drug delivery systems(SMEDDS)containing lovastatin and to further explore the ability of porous Neusilin■ US2 tablet as a solid carrier for SMEDDS.SMEDDS formulations of varying proportions of peceol,cremophor RH 40 and transcutol-P were selected and subjected to invitro evaluation,including dispersibility studies,droplet size,zeta potential measurement and release studies.The results indicated that the drug release profile of lovastatin from SMEDDS formulations was statistically significantly higher(p-value<0.05)than the plain lovastatin powder.Thermodynamic stability studies also confirmed the stability of the prepared SMEDDS formulations.The optimized formulation,which consists of 12% of peceol,44% of cremophor RH 40,and 44% of transcutol-P was loaded into directly compressed liquid loadable tablet of Neusilin■ US2 by simple adsorption method.In order to determine the ability of Neusilin®US2 as a suitable carrier pharmacodynamics study were also carried out in healthy diet induced hyperlipidemic rabbits.Animals were administered with both liquid SMEDDS and solid SMEDDS as well.From the results obtained,Neusilin■ was found to be a suitable carrier for SMEDDS and was equally effective in reducing the elevated lipid profile.In conclusion,liquid loadable tablet(LLT)is predicted to be a promising technique to deliver a liquid formulation in solid state.
文摘目的筛选葛根素自微乳的处方。方法通过药物溶解度实验和伪三元相图的绘制,以粒径大小和分布为指标,筛选油相、乳化剂、助乳化剂的处方配比。测定葛根素自微乳释药系统的溶出度。结果确定的葛根素自微乳处方比例为葛根素∶油酸聚乙醇甘油酯(labrafil M 1944CS)∶聚氧乙烯氢化蓖麻油(RH-40)∶聚乙二醇400(PEG 400)=9.1%∶36.4%∶36.4%∶18.1%。结论通过研究确定了最优化的葛根素自微乳处方,微乳粒径分布均匀。
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.
