摘要
Nanoparticles with typical core-shell structure were prepared with a blend of methoxypoly（ethylene glycol）-poly（lactide） copolymer （MPEG-PLA） and poly （lactic acid） （PLA） along with paclitaxel by the O/W solvent evaporation method. An orthogonal experiment L9（3）3 was applied to get the best preparation conditions. The core-shell paclitaxel-loaded MPEG-PLA/PLA nanoparticles with the highest drug loading efficiency were obtained when amount of MPEG-PLA, time of ultrasonication and volume of deionized water were 300 mg, 10 rain and 30 mL, respectively. The release behavior of paclitaxel from the optimal MPEG-PLA/PLA nanoparticles showed that 22% ofpaclitaxel was released in 14 d. When incubating with human nasopharyngeal carcinoma ceils expressing LMP 1, these optimal nanoparticles showed a little lower tumor growth compared with free paclitaxel.
本文制备了一种具有典型核-壳结构的载药纳米微球,由甲氧基聚乙二醇-聚乳酸共聚物(MPEG-PLA)、聚乳酸(PLA)和紫杉醇通过O/W溶剂挥发法制备而成。用正交试验L9(3)3对制备过程进行优化设计,当MPEG-PLA的用量为300 mg、超声时间为10 min、去离子水的用量为30 m L时可制得包封率最高的载有紫杉醇的MPEG-PLA/PLA纳米微球。体外溶出度实验表明14天后约有22%的紫杉醇从此微球中析出,体外抗肿瘤活性实验表明此微球对LMP1细胞具有略低于等量的游离紫杉醇的抗肿瘤活性。
基金
Key Research Foundation of Wannan Medical College(Grant No.WK2014Z06)
Doctoral Starting-up Foundation of Wannan Medical College(Grant No.201219)
