目的制备黄芩苷(baicalin,BCN)聚乙二醇维生素E琥珀酸酯(TPGS)纳米胶束(BCN-TPGS-PMs)以改善其溶解性和体外抗肿瘤效果。方法采用薄膜水化法制备BCN-TPGS-PMs;透射电子显微镜观察纳米胶束形态;粒度测定仪考察其粒径和Zeta电位;超速离心...目的制备黄芩苷(baicalin,BCN)聚乙二醇维生素E琥珀酸酯(TPGS)纳米胶束(BCN-TPGS-PMs)以改善其溶解性和体外抗肿瘤效果。方法采用薄膜水化法制备BCN-TPGS-PMs;透射电子显微镜观察纳米胶束形态;粒度测定仪考察其粒径和Zeta电位;超速离心法考察制剂的包封率及载药量;动态膜透析法考察体外释药特性;四甲基偶氮唑盐(MTT)法考察其对人乳腺癌细胞(MCF-7)的抑制作用。结果所制备的BCN-TPGS-PMs平均粒径为(11.91±0.14)nm;载药量和包封率分别为(5.42±0.04)%和(95.83±7.34)%;在体外p H 7.4、6.5的磷酸盐缓冲液(PBS)中24 h内分别释放28.53%和35.06%;表明所制备胶束粒径较小且均一,体外释放具有一定缓释性。同时体外细胞毒性实验表明BCN-TPGS-PMs较BCN能够显著地抑制MCF-7细胞的增殖(P<0.05)。结论所制备的BCN-TPGS-PMs粒径小,载药量高,稳定性好,能显著提高BCN的体外抗肿瘤效果。展开更多
Hepatocellular carcinoma (HCC) is a cancer with high incidence and mortality rates worldwide. In the various treatment methods for HCC, the lack of cancer cell specificity and the development of multidrug resistance (...Hepatocellular carcinoma (HCC) is a cancer with high incidence and mortality rates worldwide. In the various treatment methods for HCC, the lack of cancer cell specificity and the development of multidrug resistance (MDR) are two major obstacles in the treatment of HCC. P-glycoprotein (P-gp) is an ATP-dependent drug efflux pump that can reduce the accumulation of drugs in cells and make cancer cells acquire drug resistance. D-α-tocopheryl polyethylene glycol succinate (Vitamin E TPGS or TPGS) can inhibit the activity of ATP-dependent P-gp and serves as an effective excipient for overcoming tumor multidrug resistance (MDR). TPGS has been approved by the FDA as a safe adjuvant and is widely used in drug delivery systems. The biological and physicochemical properties of TPGS provide multiple advantages for its application in drug delivery, such as high biocompatibility, enhanced drug solubility, improved drug permeation, and selective antitumor activity. In recent years, more and more studies have found that using TPGS-modified nanomaterials to load chemotherapy drugs to treat tumors can effectively reverse the drug resistance of tumors, including HCC. This review summarizes and discusses the role of TPGS in reversing tumor drug resistance and the therapeutic effects of TPGS-based drugs on drug-resistant HCC.展开更多
A facile self-assembly strategy to labricate vitamin E-tocopheryl polyethylene glycol succinate （TPGS） based nanoparticles with a high drug loading level for co-delivery of multiple drugs was developed. To overcome ...A facile self-assembly strategy to labricate vitamin E-tocopheryl polyethylene glycol succinate （TPGS） based nanoparticles with a high drug loading level for co-delivery of multiple drugs was developed. To overcome multi-drug resistance, a chemotherapeutic agent （paclitaxel, PTX） and a drug resistance inhibitor （tariq- uidar, TQR） were co-loaded in the vitamin E-TPGS based nanoparticle to obtain TPGS/PTX/TQR nanoparticles. The sizes of mono-drug loaded TPGS/PTX nanoparticles and dual-drug loaded TPGS/PTX/TQR nanoparticles were below 150 nm with relatively narrow size distributions. The efficiencies of the drug delivery systems on tumor cells inhibition and reversal of drug resistance were evaluated in drug resistant cancer cells （MCF-7/ADR） as compared with nonresistant cells （HeLa）. Due to the effective inhibition of the P-gp efflux by TQR, the dual-drug loaded nanoparticles exhibited significantly improved tumor cell inhibitory efficiency. To study the immunostimulatory effect, the effect of the drug delivery system on the production of IL- 10, a cytokine related to tumor development, in the drug resistant cells was determined. After the treatment by the drug delivery systems, the concentration of IL-10 in the cell supernatant decreased. The multi-drug loaded vitamin E-TPGS nanoparticles for synergistic drug delivery have promising applications in reversal of drug resistance in tumor treatments.展开更多
Nanoparticles(NPs)have shown potential in cancer therapy,while a single administration conferring a satisfactory outcome is still unavailable.To address this issue,the dissolving microneedles(DMNs)were developed to lo...Nanoparticles(NPs)have shown potential in cancer therapy,while a single administration conferring a satisfactory outcome is still unavailable.To address this issue,the dissolving microneedles(DMNs)were developed to locally deliver functionalized NPs with combined chemotherapy and photothermal therapy(PTT).α-Tocopheryl polyethylene glycol succinate(TPGS)/hyaluronic acid(HA)dualfunctionalized PLGA NPs(HD10 NPs)were fabricated to co-load paclitaxel and indocyanine green.HD10 NPs significantly enhanced the cytotoxicity of low-dose paclitaxel because of active and mitochondrial targeting by HA and TPGS,respectively.PTT could further sensitize tumor cells toward chemotherapy by promoting apoptosis into the advanced period,highly activating caspase 3 enzyme,and significantly reducing the expression of survivin and MMP-9 proteins.Further,the anti-tumor effects of HD10 NPs delivered through different administration routes were conducted on the 4 T1 tumorbearing mice.After a single administration,HD10 NPs delivered with DMNs showed the best antitumor effect when giving chemotherapy alone.As expected,the anti-tumor effect was profoundly enhanced after combined therapy,and complete tumor ablation was achieved in the mice treated with DMNs and intra-tumor injection.Moreover,DMNs showed better safety due to moderate hyperthermia.Therefore,the DMNs along with combined chemo-photothermal therapy provide a viable treatment option for superficial tumors.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
文摘目的制备黄芩苷(baicalin,BCN)聚乙二醇维生素E琥珀酸酯(TPGS)纳米胶束(BCN-TPGS-PMs)以改善其溶解性和体外抗肿瘤效果。方法采用薄膜水化法制备BCN-TPGS-PMs;透射电子显微镜观察纳米胶束形态;粒度测定仪考察其粒径和Zeta电位;超速离心法考察制剂的包封率及载药量;动态膜透析法考察体外释药特性;四甲基偶氮唑盐(MTT)法考察其对人乳腺癌细胞(MCF-7)的抑制作用。结果所制备的BCN-TPGS-PMs平均粒径为(11.91±0.14)nm;载药量和包封率分别为(5.42±0.04)%和(95.83±7.34)%;在体外p H 7.4、6.5的磷酸盐缓冲液(PBS)中24 h内分别释放28.53%和35.06%;表明所制备胶束粒径较小且均一,体外释放具有一定缓释性。同时体外细胞毒性实验表明BCN-TPGS-PMs较BCN能够显著地抑制MCF-7细胞的增殖(P<0.05)。结论所制备的BCN-TPGS-PMs粒径小,载药量高,稳定性好,能显著提高BCN的体外抗肿瘤效果。
文摘Hepatocellular carcinoma (HCC) is a cancer with high incidence and mortality rates worldwide. In the various treatment methods for HCC, the lack of cancer cell specificity and the development of multidrug resistance (MDR) are two major obstacles in the treatment of HCC. P-glycoprotein (P-gp) is an ATP-dependent drug efflux pump that can reduce the accumulation of drugs in cells and make cancer cells acquire drug resistance. D-α-tocopheryl polyethylene glycol succinate (Vitamin E TPGS or TPGS) can inhibit the activity of ATP-dependent P-gp and serves as an effective excipient for overcoming tumor multidrug resistance (MDR). TPGS has been approved by the FDA as a safe adjuvant and is widely used in drug delivery systems. The biological and physicochemical properties of TPGS provide multiple advantages for its application in drug delivery, such as high biocompatibility, enhanced drug solubility, improved drug permeation, and selective antitumor activity. In recent years, more and more studies have found that using TPGS-modified nanomaterials to load chemotherapy drugs to treat tumors can effectively reverse the drug resistance of tumors, including HCC. This review summarizes and discusses the role of TPGS in reversing tumor drug resistance and the therapeutic effects of TPGS-based drugs on drug-resistant HCC.
基金supported by the National Natural Science Foundation of China (21274113 and 51533006)
文摘A facile self-assembly strategy to labricate vitamin E-tocopheryl polyethylene glycol succinate （TPGS） based nanoparticles with a high drug loading level for co-delivery of multiple drugs was developed. To overcome multi-drug resistance, a chemotherapeutic agent （paclitaxel, PTX） and a drug resistance inhibitor （tariq- uidar, TQR） were co-loaded in the vitamin E-TPGS based nanoparticle to obtain TPGS/PTX/TQR nanoparticles. The sizes of mono-drug loaded TPGS/PTX nanoparticles and dual-drug loaded TPGS/PTX/TQR nanoparticles were below 150 nm with relatively narrow size distributions. The efficiencies of the drug delivery systems on tumor cells inhibition and reversal of drug resistance were evaluated in drug resistant cancer cells （MCF-7/ADR） as compared with nonresistant cells （HeLa）. Due to the effective inhibition of the P-gp efflux by TQR, the dual-drug loaded nanoparticles exhibited significantly improved tumor cell inhibitory efficiency. To study the immunostimulatory effect, the effect of the drug delivery system on the production of IL- 10, a cytokine related to tumor development, in the drug resistant cells was determined. After the treatment by the drug delivery systems, the concentration of IL-10 in the cell supernatant decreased. The multi-drug loaded vitamin E-TPGS nanoparticles for synergistic drug delivery have promising applications in reversal of drug resistance in tumor treatments.
基金supported by the Fundamental Research Funds for the Central Universities(21620356,China)the Research and Development Plan for Key Areas in Guangdong Province(2019B020204002,China)the National Natural Science Foundation(81803466,China)。
文摘Nanoparticles(NPs)have shown potential in cancer therapy,while a single administration conferring a satisfactory outcome is still unavailable.To address this issue,the dissolving microneedles(DMNs)were developed to locally deliver functionalized NPs with combined chemotherapy and photothermal therapy(PTT).α-Tocopheryl polyethylene glycol succinate(TPGS)/hyaluronic acid(HA)dualfunctionalized PLGA NPs(HD10 NPs)were fabricated to co-load paclitaxel and indocyanine green.HD10 NPs significantly enhanced the cytotoxicity of low-dose paclitaxel because of active and mitochondrial targeting by HA and TPGS,respectively.PTT could further sensitize tumor cells toward chemotherapy by promoting apoptosis into the advanced period,highly activating caspase 3 enzyme,and significantly reducing the expression of survivin and MMP-9 proteins.Further,the anti-tumor effects of HD10 NPs delivered through different administration routes were conducted on the 4 T1 tumorbearing mice.After a single administration,HD10 NPs delivered with DMNs showed the best antitumor effect when giving chemotherapy alone.As expected,the anti-tumor effect was profoundly enhanced after combined therapy,and complete tumor ablation was achieved in the mice treated with DMNs and intra-tumor injection.Moreover,DMNs showed better safety due to moderate hyperthermia.Therefore,the DMNs along with combined chemo-photothermal therapy provide a viable treatment option for superficial tumors.
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.
