期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 31, 期 13, 页码 1201-1206出版社
WILEY-BLACKWELL
DOI: 10.1002/marc.200900863
关键词
disulfide; drug delivery systems; micelles; polyphosphoesters; shell-cross-linking
资金
- National Basic Research Program of China (973 Program) [2010CB934000, 2009CB930301]
- National Natural Science Foundation of China [20974105, 507333003]
Reversibly cross-linked core shell corona micelles based on a triblock copolymer composed of poly(aliphatic ester), polyphosphoester, and poly(ethylene glycol) are reported. The triblock copolymer is synthesized through consecutive ring-opening polymerization of epsilon-caprolactone and 2,4-dinitrophenylthioethyl ethylene phosphate, followed by conjugation of poly(ethylene glycol). After deprotection under mild conditions, the amphiphilic polymer forms core shell corona micelles with free thiols in the shell. Cross-linking of the micelles within the shell reduces their critical micellization concentration and enhances their stability against severe conditions. The redox-sensitive cross-linkage allows the facilitated release of entrapped anticancer drugs in the cytoplasm in response to the intracellular reductive environment. With enhanced stability during circulation after administration, and accelerated intracellular drug release at the target site, the biocompatible and biodegradable shell-cross-linked polymeric micelle is promising as a drug vehicle for cancer chemotherapy.
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