申请人:Chang J. Christopher
公开号:US20070141658A1
公开(公告)日:2007-06-21
The present invention provides a novel class of fluorogenic probes for reactive oxygen species. Exemplary probes of the invention utilize a boronate deprotection mechanism to provide high selectivity and optical dynamic range for detecting H
2
O
2
in aqueous solution over similar reactive oxygen species (ROS) including superoxide, nitric oxide, tert-butyl hydroperoxide, and hydroxyl radical; Peroxyresorufin-1 (PR1), Peroxyfluor-1 (PF1), and Peroxyxanthone-1 (PX1) are first-generation probes that respond to H
2
O
2
by an increase in red, green, and blue fluorescence, respectively. The boronate dyes are cell-permeable and can detect micromolar changes in H
2
O
2
concentrations in living cells, including hippocampal neurons, using confocal and two-photon microscopy. The unique combination of ROS selectivity, membrane permeability, and a range of available excitation/emission colors establishes the potential value of PR1, PF1, PX1, and related probes for interrogating the physiology and pathology of cellular H
2
O
2
.
本发明提供了一种新型荧光探针类别,用于检测活性氧自由基。本发明的典型探针利用硼酸酯去保护机制,在检测水溶液中的H2O2时具有高选择性和光学动态范围,超过了类似的活性氧自由基(ROS),包括超氧化物、一氧化氮、叔丁基过氧化氢和羟基自由基; Peroxyresorufin-1(PR1)、Peroxyfluor-1(PF1)和Peroxyxanthone-1(PX1)是第一代探针,分别通过红、绿和蓝荧光的增加来响应H2O2。硼酸染料可渗透细胞,并可使用共聚焦和双光子显微镜检测活细胞中微摩尔级别的H2O2浓度,包括海马神经元。ROS选择性、膜渗透性和一系列可用的激发/发射颜色的独特组合,确立了PR1、PF1、PX1和相关探针在研究细胞H2O2的生理和病理方面的潜在价值。