COMPARISON OF DRUG DELIVERY PROPERTIES OF PEG-b-PDHPC MICELLES WITH DIFFERENT COMPOSITIONS  

作　　者：顾忠伟 

机构地区：[1]National Engineering Research Center for Biomaterials,Sichuan University

出　　处：《Chinese Journal of Polymer Science》2012年第3期387-396,共10页高分子科学（英文版）

基　　金：financially supported by National Basic Research Program of China(National 973 program, No.2011CB606206);National Natural Science Foundation of China(NSFC,No.50830105);International collaboration project of Ministry of Science & Technology(MOST,No.2010DFA51550);Program for New Century Excellent Talents in Universities,Ministry of Education(MOE,NCET-10-0564)

摘　　要：An anti-tumor drug doxorubicin was encapsulated in micelles of poly（ethylene glycol）-b-poly（2,2-dihydroxyl- methyl propylene carbonate） （PEG-b-PDHPC） diblock copolymers. The morphololgy of both blank miceiles and drug loaded micelles was characterized by TEM. The in vitro drug release profiles of micelles were investigated, The cytotoxicity of the micelles was evaluated by incubating with Hela tumor cells and 3T3 fibroblasts. The drug loaded micelles were co-cultured with HepG2 cells to evaluate the in vitr9 anti-tumor efficacies. The results showed that the mean sizes of both micelles with different copolymer compositions increased after being loaded with drugs. The drug release rate of PEG45-b-PDHPC34 micelles was faster than that of mPEGt14-b-PDHPC26 micelles. Both of the two block copolymers were non-toxic. The confocal laser scanning microscopy a：ad flow cytometry results showed that both the drug loaded micelles could be internalized efficiently in HepG2 cells. The PEG45-b-PDHPC34 micelles exhibited higher anti-tumor activity comparing to mPEGxla-b-PDHPC26 micelles.An anti-tumor drug doxorubicin was encapsulated in micelles of poly（ethylene glycol）-b-poly（2,2-dihydroxyl- methyl propylene carbonate） （PEG-b-PDHPC） diblock copolymers. The morphololgy of both blank miceiles and drug loaded micelles was characterized by TEM. The in vitro drug release profiles of micelles were investigated, The cytotoxicity of the micelles was evaluated by incubating with Hela tumor cells and 3T3 fibroblasts. The drug loaded micelles were co-cultured with HepG2 cells to evaluate the in vitr9 anti-tumor efficacies. The results showed that the mean sizes of both micelles with different copolymer compositions increased after being loaded with drugs. The drug release rate of PEG45-b-PDHPC34 micelles was faster than that of mPEGt14-b-PDHPC26 micelles. Both of the two block copolymers were non-toxic. The confocal laser scanning microscopy a：ad flow cytometry results showed that both the drug loaded micelles could be internalized efficiently in HepG2 cells. The PEG45-b-PDHPC34 micelles exhibited higher anti-tumor activity comparing to mPEGxla-b-PDHPC26 micelles.

关 键 词：Drug delivery Micelles DOXORUBICIN Biodegradable. 

分 类 号：TQ460.1[化学工程—制药化工]