胶束
体内
生物利用度
泊洛沙姆
药物输送
材料科学
生物物理学
癌细胞
药理学
癌症
化学
纳米技术
水溶液
生物
有机化学
共聚物
生物技术
复合材料
遗传学
聚合物
作者
Yi Chun Chen,Chun Liang Lo,Yu Fen Lin,Ging Ho Hsiue
出处
期刊:Biomaterials
[Elsevier]
日期:2013-01-01
卷期号:34 (4): 1115-1127
被引量:63
标识
DOI:10.1016/j.biomaterials.2012.10.034
摘要
Rapamycin has been developed as a potential anticancer drug for treatment in rapamycin-sensitive cancer models, but its poor water solubility greatly hampers the application to cancer therapy. This study investigated the preparation, release profiles, uptake and in vitro/in vivo study of a dual-responsive micellar formulation of rapamycin. Rapamycin-loaded micelles (rapa-micelles) measured approximately ca. 150 nm with narrow size distribution and high stability in bovine serum albumin solution. It was shown that rapamycin could be loaded efficiently in mixed micelles up to a concentration of 1.8 mg/mL by a hot shock protocol. Rapamycin release kinetic studies demonstrated that this type of micellar system could be applied in physiological conditions under varied pH environments. Confocal and pH-topography imaging revealed a clear distribution of rapa-micelles, and visible intracellular pH changes which induced encapsulated rapamycin to be released and then induced autophagolysosome formation. In vivo tumor growth inhibition showed that rapa-micelles exhibited excellent antitumor activity and a high rate of apoptosis in HCT116 cancer cells. These results indicated that dual-responsive mixed micelles provided a suitable delivery system for the parenteral administration of drugs with poor water solubility, such as rapamycin, in cancer therapy.
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