作者:Kristy M. DiVittorio、James R. Johnson、Emma Johansson、Aaron J. Reynolds、Katrina A. Jolliffe、Bradley D. Smith
DOI:10.1039/b514748d
日期:——
The appearance of anionic phosphatidylserine (PS) in the outer monolayer of the plasma membrane is a universal indicator of the early/intermediate stages of cell apoptosis. The most common method of detecting PS on a cell surface is to use the protein annexin V; however, in certain applications there is a need for alternative reagents. Recent research indicates that rationally designed zinc 2,2′-dipicolylamine (Zn2+–DPA) coordination complexes can mimic the apoptosis sensing function of annexin V. Here, a series of fluorescently-labelled, tri-and pentapeptides with side chains containing Zn2+–DPA are prepared and shown to selectively bind to anionic vesicle membranes. Fluorescein-labelled versions of the peptides are used to detect apoptotic cells by fluorescence microscopy and flow cytometry.
质膜外单层出现阴离子磷脂酰丝氨酸(PS)是细胞凋亡早期/中期的通用指标。检测细胞表面磷脂酰丝氨酸最常用的方法是使用蛋白附件素 V,但在某些应用中需要使用替代试剂。最近的研究表明,合理设计的 2,2′-二羟基胺锌(Zn2+-DPA)配位复合物可以模拟附件蛋白 V 的凋亡传感功能。本文制备了一系列荧光标记的三肽和五肽,其侧链含有 Zn2+-DPA,结果表明它们能选择性地与阴离子囊泡膜结合。用荧光显微镜和流式细胞术检测凋亡细胞。