期刊
EUROPEAN POLYMER JOURNAL
卷 85, 期 -, 页码 38-52出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2016.09.047
关键词
-
资金
- Natural Science Foundation of China [81671802, 11374207, 31370750, 91227109]
- Key Projects in the National Science & Technology Pillar Program of China [2014BAI09B03]
The need for smart materials in the area of biotechnology has accelerated the development of stimuli-responsive copolymer micelles. Here, we reported a novel dual-stimuli responsive block copolymer PEG-DMTK-SS-PLA with both dimethyl thioketal (DMTK) and disulfide linkage incorporated into the backbone, capable of triggering fast drug release properties upon both oxidative (H2O2) and reductive (GSH) environment. The CMC values of these copolymer micelles ranging from 0.051 to 0.087 mg mL(-1), the average diameters are from 34 nm to 55 nm and 65 nm to 198 nm for blank and DOX-loaded micelles respectively. MTT assay conducted in NIH 3T3 cells showed the low cytotoxicity of these micelles even when the concentration reached up to 500 mu g/mL. Considering tumor microenvironment's diverse in kinds of tumor cells, fluorescence microscopy, flow cytometry and MTT activity analysis were conducted in several cancer cells (e.g., cervix, lung, gastric, and colon cancer cells), and further confirmed that the dual responsive PEG-DMTK-SS-PLA micelles were degraded much faster than that of non-responsive PEG-PIA and single responsive PEG-SS-PLA and PEG-DMTK-PLA micelles. These results indicate that the dual responsive micelles are promising for efficient anticancer drug delivery. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据