The invention provides nanoparticles for delivery of imaging agents, drugs, and other molecules, such as genetic material. The nanoparticles have a core structure comprising the imaging agent and/or drug, and a shell structure that allows for water solubility. The shell structure further provides a barrier with limited water permeability that protects the core. The nanoparticles can be induced to release their cargo by treatment with ultrasound. Methods of delivering drugs and imaging agents are also provided, whereby the nanoparticles are delivered to tissues of interest in a substantially inert form, then activated using ultra-sound to release the drugs or imaging agents.
这项发明提供了用于传递成像剂、药物和其他分子(如
基因物质)的纳米颗粒。这些纳米颗粒具有核心结构,包括成像剂和/或药物,以及允许
水溶性的外壳结构。外壳结构进一步提供了一个有限
水渗透性的屏障,保护核心。可以通过超声治疗诱导纳米颗粒释放其载荷。还提供了传递药物和成像剂的方法,其中纳米颗粒以基本惰性的形式传递到感兴趣的组织中,然后使用超声激活以释放药物或成像剂。