Nucleophilic reactivity of biothiols toward coumarin-based derivatives containing a chalcone moiety
作者:Olimpo García-Beltrán、Christopher González、Edwin G. Pérez、Bruce K. Cassels、José G. Santos、Daniela Millán、Natalia Mena、Paulina Pavez、Margarita E. Aliaga
DOI:10.1002/poc.2975
日期:2012.11
kinetically. With a large excess of biothiol, pseudo‐first‐order rate coefficients (kobsd) were found. Plots of kobsd versus [biothiolate] are linear, with a pH‐independent slope (kN). With the kinetic results obtained, the following conclusions can be drawn: (i) the reactivity increases in the sequence Cys‐Gly < Hcy < GSH < Cys; (ii) similar reactivitytowardbiothiols was found for ChC2 and ChC3, and
生物硫醇半胱氨酸(Cys),谷胱甘肽(GSH),高半胱氨酸(Hcy)和半胱氨酸甘氨酸(Cys-Gly)与(E)-3-(3-(2-(2-甲氧基苯基)丙烯酰基)-7-甲氧基- 2 ħ -苯并吡喃-2-酮和(ë)-3-(3-(3-甲氧基苯基)丙烯酰基)-7-甲氧基-2- ħ在水溶液-色烯-2-酮(ChC2和ChC3,分别地)(25在室温下,用荧光法测定离子强度(0.2 M KCl),并进行动力学评估。大量生物硫醇存在时,发现伪一阶速率系数(k obsd)。的曲线图ķ实测值与[biothiolate]是线性的,具有pH非依赖性的斜率(ķ Ñ)。根据获得的动力学结果,可以得出以下结论:(i)反应性按Cys-Gly
Fluorescent compounds for imaging of blood vessels and blood flow, and an in vivo screen for pro- and anti-angiogenic agents
申请人:Mendoza Jose
公开号:US10744213B2
公开(公告)日:2020-08-18
The present invention discloses fluorescent compounds and a method for their use for selective imaging of blood vessels and blood flow. By applying these fluorescent compounds and the imaging process to a zebrafish model, the present invention further provides methods and procedures for the discovery, selection, and characterization of pro- and anti-angiogenic agents.
The development of a fluorescence turn-on sensor for cysteine, glutathione and other biothiols. A kinetic study
作者:Olimpo García-Beltrán、Natalia Mena、Edwin G. Pérez、Bruce K. Cassels、Marco T. Nuñez、Francisca Werlinger、Daniel Zavala、Margarita E. Aliaga、Paulina Pavez
DOI:10.1016/j.tetlet.2011.09.137
日期:2011.12
(Cys), glutathione (GSH) and other biothiols, such as homocysteine (Hcy) and cysteinyl-glycine (Cys-Gly), were developed. These molecular probes are coumarin-basedderivativescontaining a chalcone-like moiety that reacts with biothiols through a Michael addition reaction, leading to strong fluorescence enhancements. The reactivity of the tested biothiolstoward both probes (ChC1 and ChC2) follows