项目名称: 磷脂/蛋白质仿生微胶囊在双光子激发光动力治疗中的应用及机理研究
项目编号: No.21273055
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 杨洋
作者单位: 国家纳米科学中心
项目金额: 80万元
中文摘要: 本项申请通过分子组装的方式设计构建磷脂/蛋白质仿生微胶囊,并用于负载光敏药物。此微胶囊模拟细胞膜的结构和性质,具有良好的生物兼容性和生物可降解性,作为药物载体很容易抵达细胞内部。磷脂头部基团可用双光子吸收的荧光基团修饰,当体系被近红外双光子光源激发时,磷脂的荧光基团与光敏药物在微胶囊壁的磷脂双层空间内,通过分子间作用发生荧光共振能量转移(FRET),从而在生物体系发生光动力疗效(PDT)。微胶囊组装单元的多样性将极大提高FRET给体与配体的选择性,提高FRET效率。在生物体系实现双光子引发的光动力治疗,最终目标将光动力治疗从表浅治疗领域扩展到对深层组织的治疗。
中文关键词: 光动力治疗;双光子激发;纳米材料;荧光共振能量转移;分子组装
英文摘要: Lipid and protein will be chosen as a pair to fabricate microcapsules used as photosensitizing drug carriers. The microcapsules will be completely biocompatible and biodegradable. They can transport photosensitizing drug into the cancer cell readily. The lipid can be modified by two-photon absorbing fluorescent dye as energy donor of Fluorescence Resonance Energy Transfer (FRET). The photosensitizing drug which be solubilized in small unilamellar lipid of microcapsule can be used as energy acceptor of FRET. The bionic microcapsules combine the following features: (1) the limited space of unilamellar lipid enhanced two-photon absorption and emission properties between donor and acceptor; (2) more donors and acceptors can be selected as the components of LbL microcapsules; (3) more importantly, two-photon activated-photodynamic therapy allows for spatially selective treatment of cancers, and enhances the tissue penetration depth of incident light.
英文关键词: photodynamic therapy;two-photon actived;naomaterials;FRET;molecular assembly