A novel near-infrared fluorescent probe with a large Stokes shift for biothiol detection and application in in vitro and in vivo fluorescence imaging
作者:Keyin Liu、Huiming Shang、Xiuqi Kong、Weiying Lin
DOI:10.1039/c7tb00187h
日期:——
of these organs. Fluorescence detection of biothiols in living organisms is of great importance for exploring the metabolic pathways and physiological function in living organisms. Most of the near-infrared probes for biothiols have small Stokes shifts, usually less than 50 nm, which greatly hamper their applications in biological imaging; herein, a novel fluorescent CS-thiol probe based on a Changsha
半胱氨酸(Cys)和谷胱甘肽(GSH)等生物硫醇是重要的还原性物种,广泛分布于肝脏,心脏,大脑等,对于维持这些器官的基本作用至关重要。荧光检测生物体内生物硫醇对于探索生物体内的代谢途径和生理功能非常重要。大多数用于生物硫醇的近红外探针的斯托克斯位移很小,通常小于50 nm,这极大地阻碍了它们在生物成像中的应用。本文中,开发了一种基于长沙(CS)长斯托克斯频移的长沙(CS)近红外染料类似物的新型荧光CS-硫醇探针,并将其应用于活体动物成像。在存在生物硫醇(例如Cys)的情况下,CS-硫醇在660 nm处显示出宽广的荧光发射,并且对其他氨基酸和反应性物种中的生物硫醇具有很高的选择性。CS-硫醇对HeLa细胞几乎没有毒性,已成功应用于活细胞和活动物中的生物硫醇成像。