writer：1. Jie Wang, Guang Yang, Xing Guo, Zhaomin Tang, Zhendong Zhong, Shaobing Zhou*
keywords：Micelle,redox-responsive,drug delivery,
source：期刊
specific source：Biomaterials, 2014, 35, 3080-3090.
Issue time：2014年
Biodegradable polyanhydrides possess unique features like those that they can predominantly undergo
surface erosion, and the payloads can be released by a steady speed. However, there is little work that has
been published to describe the polyanhydride micelles with redox-responsiveness as a nanocarrier for
drug delivery. In this study, we develop one type of new amphiphilic polyanhydride copolymer con-
taining disul fi de bonds between the hydrophilic and hydrophobic segments. The copolymer can self-
assemble into stable micelles with well-de fi ned coreeshell structure and a uniform size distribution
with an average diameter of 69 nm. The disassembly behaviors of the micelles triggered by glutathione
are evaluated from the changes of the micellar size, morphology and molecular weight. An approximate
zero-order in vitro drug release mode with a fast speed can be achieved in a reducing and acid envi-
ronment similar with that of tumor cells. In vitro cytotoxicity analysis demonstrate that the Cur-loaded
micelles are of great ef fi ciency in inhibiting the growth of cancer cells due to the rapidly intracellular
delivery of therapeutic agent. Both the qualitative and quantitative results of the antitumor activity in
4T1  tumor-bearing  BALB/c  mice  reveal  that  the  redox-responsive  micelles  have  a  more  signi fi cant
therapeutic effect to arti fi cial solid tumor compared to the redox-insensitive micelles. This study pro-
vides a new insight into the biomedical application of polyanhydrides in drug delivery.