SWITCHING FLUORESCENT NANOPARTICLE PROBE AND FLUORESCENT PARTICLE IMAGING METHOD USING SAME
申请人:Hara Isao
公开号:US20130149252A1
公开(公告)日:2013-06-13
The present invention provides a novel fluorescent nanoparticle imaging probe having a switching function (a function to quench a fluorescent dye during nanoparticle preparation, and emit fluorescence during imaging). A switching fluorescent nanoparticle probe comprising: a molecular assembly composed of an amphiphilic block polymer having a hydrophilic block chain and a hydrophobic block chain; and a fluorescent dye encapsulated in the molecular assembly, wherein (a) the hydrophilic block chain comprises, as an essential hydrophilic structural unit, a unit selected from a sarcosine unit and an alkylene oxide unit, (b) the hydrophobic block chain comprises, as an essential hydrophobic structural unit, a unit selected from the group consisting of an amino acid unit and a hydroxylic acid unit, and (c) the fluorescent dye is a cyanine compound represented by the formula (I):
and two or more molecules of the fluorescent dye are encapsulated in the single molecular assembly.
本发明提供一种新型荧光纳米颗粒成像探针,具有切换功能(在纳米颗粒制备过程中熄灭荧光染料,并在成像过程中发射荧光)。一种切换荧光纳米颗粒探针包括:由具有亲水性块链和疏水性块链的两性块聚合物组成的分子组装体;以及封装在分子组装体中的荧光染料,其中(a)亲水性块链包括作为必要亲水性结构单元的一种选自肌氨酸单元和烷氧基单元的单元,(b)疏水性块链包括作为必要疏水性结构单元的一种选自氨基酸单元和羟基酸单元的单元,(c)荧光染料是由式(I)表示的青菁化合物:并且两个或更多分子的荧光染料被封装在单个分子组装体中。