Two-Photon Fluorescence Probe for Selective Monitoring of Superoxide in Live Cells and Tissues
作者:Liyan Chen、Myoung Ki Cho、Di Wu、Hwan Myung Kim、Juyoung Yoon
DOI:10.1021/acs.analchem.9b03937
日期:2019.11.19
The abnormal location or generation of superoxide radical anion (O2•–) are implicated in many diseases, including cancers; thus, development of an efficient method to detect O2•– is of great importance. Inspired by the fluorophore-governed selective manner to O2•– and peroxynitrite (ONOO–) of previously reported phosphinate-based fluorescence probes, in this contribution, a phosphinothioate-containing probe, TPP, was designed. The probe exhibited easy accessibility through a one-step sequence and good photostability and biocompatibility. Interestingly, TPP showed high specificity and sensitivity to O2•– over other reactive oxygen species/nitrogen species including ONOO–. Furthermore, with the assistance of two-photon microscopy, TPP was successfully applied for imaging endogenous O2•– in live cells and tissues.
超氧阴离子自由基(O2•–)的异常分布或产生与许多疾病有关,包括癌症。因此,开发一种高效检测O2•–的方法十分重要。受先前报道的磷酸酯类荧光探针对O2•–和过氧亚硝酸盐(ONOO–)的选择性检测启发,本研究设计了一种含磷硫酸酯的探针TPP。该探针具有单步合成易得性、良好的光稳定性和生物相容性。有趣的是,与其他活性氧/氮物种(包括ONOO–)相比,TPP对O2•–表现出高度特异性和灵敏度。此外,借助双光子显微镜,TPP成功实现了对活细胞和组织中内源性O2•–的成像。