The present invention relates to a reversible fluorescence photoswitch based on the dye-crosslinked dendritic nanoclusters for high-contrast imaging of living biological systems. The dendritic nanocluster according to the present invention consists of two or more dendrimers crosslinked each other to have a globular shape overall, and thereby enhancing the fluorescence intensity and improving the detection sensitivity of the monomeric dendrimers. In addition, the dendritic nanocluster according to the present invention was found to internalize into a living zebrafish by both skin permeation and microinjection, independently. Further, the dendritic nanocluster according to the present invention showed low toxicity and thus it could be useful for both in vivo and in vitro imaging as well as the ex vivo cell tracking applications.
本发明涉及一种基于
染料交联树状纳米团簇的可逆荧光光开关,用于高对比度成像活体
生物系统。本发明的树状纳米团簇由两个或更多树状分子交联形成,整体呈球形,从而增强了单体树状分子的荧光强度并提高了检测灵敏度。此外,本发明的树状纳米团簇被发现可以通过皮肤渗透和微注射两种方式内化到活体斑马鱼中。此外,本发明的树状纳米团簇毒性低,因此可用于体内和体外成像以及细胞追踪应用。