Asymmetric and Reduced Xanthene Fluorophores: Synthesis, Photochemical Properties, and Application to Activatable Fluorescent Probes for Detection of Nitroreductase
作者:More、Lim、Kang、Yun、Yee、Chang
DOI:10.3390/molecules24173206
日期:——
including fluorescein, rhodol, and rhodamines, are representative classes of fluorescent probes that have been applied in the detection and visualization of biomolecules. “Turn on” activatable fluorescent probes, that can be turned on in response to enzymatic reactions, have been developed and prepared to reduce the high background signal of “always-on” fluorescent probes. However, the development of
呫吨荧光团,包括荧光素、罗多醇和罗丹明,是已应用于生物分子检测和可视化的荧光探针的代表性类别。“开启”可激活荧光探针可响应酶促反应而开启,已开发并准备好降低“始终开启”荧光探针的高背景信号。然而,用于生物应用的基于活性的荧光探针的开发,使用简单的呫吨染料,由于其低效的合成方法和化学修饰的困难而受到阻碍。因此,我们开发了一种高效、通用的合成路线,以通过连续 Pd 催化的交叉偶联开发基于荧光素、若多醇和罗丹明的化学更稳定的还原呫吨荧光团。通过监测荧光浓度、pH 值和溶剂的变化来评估它们的荧光性质。作为可激活荧光探针的应用,还使用还原的呫吨荧光团开发了硝基还原酶 (NTR) 响应荧光探针,并评估了它们的荧光特性。