为延长盐酸吉西他滨(1)的半衰期、提高生物利用度,采用逆相蒸发法制备聚乙二醇1000维生素E琥珀酸酯(TPGS)修饰的1脂质体(1-LP),并考察其性质和在大鼠体内的药动学行为。结果表明,所得1-LP的粒径为(212.6±7.2)nm、z电位为(-31.1...为延长盐酸吉西他滨(1)的半衰期、提高生物利用度,采用逆相蒸发法制备聚乙二醇1000维生素E琥珀酸酯(TPGS)修饰的1脂质体(1-LP),并考察其性质和在大鼠体内的药动学行为。结果表明,所得1-LP的粒径为(212.6±7.2)nm、z电位为(-31.1±2.9)m V、包封率为(70.56±1.92)%、载药量为(7.41±0.05)%。绘制了1-LP和1水溶液在p H 7.4磷酸盐缓冲液中的体外释药曲线,并用几种常用模型拟合试验数据。结果二者的释药数据均用双指数模型拟合效果较好(R^2为0.996和0.947)。对比研究了SD大鼠尾静脉注射给予1-LP或市售1注射液后的药动学行为。血浆中的药物浓度采用HPLC法测定。所得主要药动学参数为:t_(1/2)(4.12±0.73)和(1.32±0.10)h,AUC_(0→∞)(37.57±1.09)和(9.64±0.20)mg·L·h^(-1),MRT_(0→∞)(6.06±0.28)和(1.67±0.04)h。展开更多
Multidrug resistance （MDR） operated by P-glycoprotein （P-gp） is one of the major causes in the treatment failure of cancers. In this work, docetaxel-loaded mixed micelles comprised of 1,2-distearoyl-sn-glycero-3-p...Multidrug resistance （MDR） operated by P-glycoprotein （P-gp） is one of the major causes in the treatment failure of cancers. In this work, docetaxel-loaded mixed micelles comprised of 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-methoxy （polyethylene-glycol）2000 （DSPE-PEG2000）, D-α-Tocopherylpolyethylene glycol 1000 succinate （TPGSIooo） and DSPE-PEG2000-folate were developed to overcome MDR and reduce the side effect of docetaxel in cancer therapy. The diameters of micelles ranged from 13 to 26 nm and the encapsulation efficiencies were all above 85%. The influences of DSPE-PEG2000 and TPGSIooo ratios on the micellar characteristics and anti-resistant tumors effects were evaluated. Micelles with high TPGS1000 amount showed an increased cellular uptake and stronger cytotoxicity against MDR KBv cells. Moreover, the micelles modified by targeting ligand of folic acid exhibited better antitumor effect on folate receptor over-expressing KBv cells. The study provides a method for overcoming MDR in cancer therapy.展开更多
1 TPG公司的基本情况
荷兰TPG公司是一家提供邮件、快运和物流服务的全球性公司,在1997年荷兰邮政集团公司KPN兼并了澳大利亚TNT集团公司后,KPN公司将其皇家PTT邮政与原TNT集团合并组建TPG公司,TPG是TNT Post Group的英文缩写,于1998年...1 TPG公司的基本情况
荷兰TPG公司是一家提供邮件、快运和物流服务的全球性公司,在1997年荷兰邮政集团公司KPN兼并了澳大利亚TNT集团公司后,KPN公司将其皇家PTT邮政与原TNT集团合并组建TPG公司,TPG是TNT Post Group的英文缩写,于1998年6月挂牌上市,是世界上最大的国际商务邮件服务商,也是唯一在欧洲各主要城市拥有网络的快件服务商.展开更多
文摘为延长盐酸吉西他滨(1)的半衰期、提高生物利用度,采用逆相蒸发法制备聚乙二醇1000维生素E琥珀酸酯(TPGS)修饰的1脂质体(1-LP),并考察其性质和在大鼠体内的药动学行为。结果表明,所得1-LP的粒径为(212.6±7.2)nm、z电位为(-31.1±2.9)m V、包封率为(70.56±1.92)%、载药量为(7.41±0.05)%。绘制了1-LP和1水溶液在p H 7.4磷酸盐缓冲液中的体外释药曲线,并用几种常用模型拟合试验数据。结果二者的释药数据均用双指数模型拟合效果较好(R^2为0.996和0.947)。对比研究了SD大鼠尾静脉注射给予1-LP或市售1注射液后的药动学行为。血浆中的药物浓度采用HPLC法测定。所得主要药动学参数为:t_(1/2)(4.12±0.73)和(1.32±0.10)h,AUC_(0→∞)(37.57±1.09)和(9.64±0.20)mg·L·h^(-1),MRT_(0→∞)(6.06±0.28)和(1.67±0.04)h。
基金National Natural Science Foundation of China(Grant No.81273454 and 81473156)Beijing National Science Foundation(Grant No.7132113)+1 种基金National Key Basic Research Program(Grant No.2013CB932501)Doctoral Foundation of the Ministry of Education(Grant No.20130001110055)
文摘Multidrug resistance （MDR） operated by P-glycoprotein （P-gp） is one of the major causes in the treatment failure of cancers. In this work, docetaxel-loaded mixed micelles comprised of 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-methoxy （polyethylene-glycol）2000 （DSPE-PEG2000）, D-α-Tocopherylpolyethylene glycol 1000 succinate （TPGSIooo） and DSPE-PEG2000-folate were developed to overcome MDR and reduce the side effect of docetaxel in cancer therapy. The diameters of micelles ranged from 13 to 26 nm and the encapsulation efficiencies were all above 85%. The influences of DSPE-PEG2000 and TPGSIooo ratios on the micellar characteristics and anti-resistant tumors effects were evaluated. Micelles with high TPGS1000 amount showed an increased cellular uptake and stronger cytotoxicity against MDR KBv cells. Moreover, the micelles modified by targeting ligand of folic acid exhibited better antitumor effect on folate receptor over-expressing KBv cells. The study provides a method for overcoming MDR in cancer therapy.
文摘1 TPG公司的基本情况
荷兰TPG公司是一家提供邮件、快运和物流服务的全球性公司,在1997年荷兰邮政集团公司KPN兼并了澳大利亚TNT集团公司后,KPN公司将其皇家PTT邮政与原TNT集团合并组建TPG公司,TPG是TNT Post Group的英文缩写,于1998年6月挂牌上市,是世界上最大的国际商务邮件服务商,也是唯一在欧洲各主要城市拥有网络的快件服务商.
