Thiol-based fluorescent probe for reactive species
申请人:The Board of Trustees of the University of Illinois
公开号:US11339175B2
公开(公告)日:2022-05-24
Detection of nitroxyl (HNO), the transient one-electron reduced form of nitric oxide, is a significant challenge owing to its high reactivity with biological thiols (rate constants as high as 109M−1 s−1). Reported herein is a new thiol-based HNO-responsive trigger that can compete against reactive thiols for HNO. This process forms an N-hydroxysulfenamide intermediate which cyclizes to release a masked fluorophore leading to fluorescence enhancement. To ensure a rapid cyclization step, the disclosed design capitalizes on two established physical organic phenomena: the alpha-effect and the Thorpe-Ingold effect. Using this new trigger, NitroxylFluor was developed; a selective HNO-responsive fluorescent probe. Treatment of NitroxylFluor with an HNO donor results in a 16-fold turn-on. This probe also exhibits excellent selectivity over various reactive nitrogen, oxygen, and sulfur species and efficacy in the presence of thiols (e.g., glutathione in mM concentrations). Also, live cell imaging of HNO using NitroxylFluor was performed.
NitroxylFluor: A Thiol-Based Fluorescent Probe for Live-Cell Imaging of Nitroxyl
作者:Nicholas W. Pino、Jerome Davis、Zhengxin Yu、Jefferson Chan
DOI:10.1021/jacs.7b11471
日期:2017.12.27
Detection of nitroxyl (HNO), the transient one-electron reduced form of nitric oxide, is a significant challenge owing to its high reactivity with biological thiols (with rate constants as high as 109 M-1 s-1). To address this, we report a new thiol-based HNO-responsive trigger that can compete against reactive thiols for HNO. This process forms a common N-hydroxysulfenamide intermediate that cyclizes
THIOL-BASED FLUORESCENT PROBE FOR REACTIVE SPECIES
申请人:The Board of Trustees of the University of Illinois
公开号:US20200140452A1
公开(公告)日:2020-05-07
Detection of nitroxyl (HNO), the transient one-electron reduced form of nitric oxide, is a significant challenge owing to its high reactivity with biological thiols (rate constants as high as 10
9
M
−1
s
−1
). Reported herein is a new thiol-based HNO-responsive trigger that can compete against reactive thiols for HNO. This process forms an N-hydroxysulfenamide intermediate which cyclizes to release a masked fluorophore leading to fluorescence enhancement. To ensure a rapid cyclization step, the disclosed design capitalizes on two established physical organic phenomena: the alpha-effect and the Thorpe-Ingold effect. Using this new trigger, NitroxylFluor was developed; a selective HNO-responsive fluorescent probe. Treatment of NitroxylFluor with an HNO donor results in a 16-fold turn-on. This probe also exhibits excellent selectivity over various reactive nitrogen, oxygen, and sulfur species and efficacy in the presence of thiols (e.g., glutathione in mM concentrations). Also, live cell imaging of HNO using NitroxylFluor was performed.