文献类型： 外文期刊

作者： Wang, Ranran ¹ ; Hu, Hao ² ; Cai, Qin ² ; Zhao, Nana ¹ ; Zhu, Yun; Xu, Fujian ¹ ;

作者机构： 1.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

2.Beijing Univ Chem Technol, Minist Educ, Key Lab Carbon Fiber & Funct Polymers, Beijing 100029, Peoples R China

3.Beijing Univ Chem Technol, Beijing Lab Biomed Mat, Beijing 100029, Peoples R China

4.Beijing Univ Chem Technol, Beijing Lab Bio

关键词： amylopectin;ATRP;gene carriers;CT imaging

期刊名称：SCIENCE CHINA-CHEMISTRY （ 影响因子：10.4； 五年影响因子：7.9 ）

ISSN： 1674-7291

年卷期： 2015 年 58 卷 9 期

页码：

收录情况： SCI

摘要： Successful gene vectors should be with high transfection efficiency and minimal cytotoxicity. Natural polysaccharides, due to their good biocompatibility and biodegradability, have been widely studied and applied. Amylopectin is one of polysaccharides with dendritic structure and numerous hydroxyl groups that could be used for subsequent modification. In this work, a series of dendritic cationic gene vectors comprising amylopectin backbones and poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA) side chains with different lengths (termed as AMY-PDs) were readily prepared by atom transfer radical polymerization (ATRP). The gene condensation ability, cytotoxicity and gene transfection of AMY-PDs carriers were investigated. In comparison with "gold-standard" poly(ethyleneimine) (PEI, 25 kDa), the AMY-PDs exhibited higher transfection efficiency with lower cytotoxicity. AMY-PDs could be further modified with Au nanoparticles (termed as AMY-PD@Au). The potential of the AMY-PD@Au vectors to be utilized as a CT contrast agent for imaging of cancer cells was investigated. Such AMY-PD@Au vectors may realize gene therapy with the ability of real-time imaging.