聚合物囊泡
乙二醇
葡萄糖氧化酶
木筏
化学
胰岛素
共聚物
聚合
膜
膜透性
生物物理学
高分子化学
组合化学
生物化学
有机化学
聚合物
两亲性
内科学
生物传感器
医学
生物
作者
Dongxu Zhou,Siyu Li,Zhixiong Fei,Peng Zhou,Yaqi Zhao,Lunhao Zhi,Chenxi Li,Peng Xu,Xiaoling Liu,Changsheng Zhao
出处
期刊:Biomacromolecules
[American Chemical Society]
日期:2021-08-23
卷期号:22 (9): 3971-3979
被引量:7
标识
DOI:10.1021/acs.biomac.1c00772
摘要
Smart insulin delivery systems now play essential roles in diabetes treatment, whereas most existing systems suffer from insufficient regulation against blood glucose. Here, a glucose and pH dual-responsive insulin delivery system with multilevel self-regulation of blood glucose was constructed. Photocross-linked dual-responsive polymersomes were prepared by the self-assembly of the diblock copolymer methoxyl poly(ethylene glycol)-b-poly[3-acrylamidophenylboronic acid-co-2-(diethylamino)ethyl methacrylate-co-2-hydroxy-4-(methacryloyloxy)benzophenone] (mPEG-b-P(AAPBA-co-DEAEMA-co-BMA)) synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT), where insulin and glucose oxidase (GOx) were co-encapsulated inside. It is worth noting that the polymersomes with tunable membrane permeability are the first glucose-responsive platform consisting of both PBA and GOx. According to the pH change produced by gluconic acid, the pH-sensitive monomer DEAEMA endowed the polymersome membrane with multilevelly tunable and self-regulative permeability, further controlling the release behavior of insulin. This multilevel tunability was reflected directly in in vitro insulin release tests and was proven by the self-regulation of blood glucose in vivo. Promisingly, the polymersomes have great potential to be applied for the self-regulation of blood glucose in the treatment of diabetes.
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