Rate of Lipid Peroxyl Radical Production during Cellular Homeostasis Unraveled via Fluorescence Imaging
作者:Lana E. Greene、Richard Lincoln、Gonzalo Cosa
DOI:10.1021/jacs.7b08036
日期:2017.11.8
species (ROS) and their associated byproducts have been traditionally associated with a range of pathologies. It is now believed, however, that at basal levels these molecules also have a beneficial cellular function in the form of cell signaling and redox regulation. Critical to elucidating their physiological role is the opportunity to visualize and quantify the production of ROS with spatiotemporal accuracy
活性氧(ROS)及其相关副产物传统上已与一系列病理相关。然而,现在认为,在基础水平上,这些分子还以细胞信号传导和氧化还原调节的形式具有有益的细胞功能。阐明其生理作用的关键是可视化和量化具有时空准确性的ROS产生的机会。配备了新开发的极其敏感的荧光α-生育酚类似物(H 4 BPMHC),我们在此报告了在活细胞成像条件下产生的脂质过氧自由基稳定浓度的观察结果。H 4的影像学研究BPMHC表明,在基础条件下,HeLa细胞中脂质过氧化自由基的产生速率在细胞内为33 nM / h。我们的工作进一步提供了有关维生素E抗氧化作用的无可争议的证据,因为在碱性条件下以及在溶液中存在氢过氧化枯基和Cu 2+产生的Haber-Weiss化学作用下,HeLa细胞中的脂质过氧化被抑制,当补充有α-生育酚替代物PMHC(2,2,5,7,8-五甲基-6-羟基-苯并二氢吡喃酚,缺少植酸尾的α-生育酚类似物)时。高4BPM