A Selective, Cell-Permeable Optical Probe for Hydrogen Peroxide in Living Cells
摘要:
We present the synthesis, properties, and biological applications of Peroxyfluor-1 (PF1), a new type of optical probe for intracellular imaging of hydrogen peroxide in living biological samples. PF1 utilizes a boronate deprotection mechanism to provide unprecedented selectivity and optical dynamic range for detecting H2O2 in aqueous solution over similar reactive oxygen species including superoxide, nitric oxide, tert-butyl hydroperoxide, and hydroxyl radical. We further demonstrate the value of this reagent for biological applications by imaging changes in [H2O2] in living mammalian cells.
The present invention provides a novel class of pro-fluorescent probes for reactive oxygen species (ROS). One exemplary probe is mitochondria peroxy yellow 1 (MitoPY1), a new type of flurophore for imaging mitochondrial H2O2 in living cells with ROS and spatial specificity. The invention also provides methods of using pro-fluorescent probes to detect analytes. One exemplary method comprises using a pro-fluorescent probe of the invention to detect an explosive.
Boronate ester cross-linked PVA hydrogels for the capture and H<sub>2</sub>O<sub>2</sub>-mediated release of active fluorophores
作者:George T. Williams、Adam C. Sedgwick、Sajal Sen、Lauren Gwynne、Jordan E. Gardiner、James T. Brewster、Jennifer R. Hiscock、Tony D. James、A. Toby A. Jenkins、Jonathan L. Sessler
DOI:10.1039/d0cc01904f
日期:——
A new set of H2O2-responsive PVA hydrogels were formed using the boronate fluorescent probe PF1 and the novel boronate fluorescent probe PT1 as the covalent crosslinkers.
The generation of highly reactive oxygen (1O2) is very significant for a variety of applications such as degradation, bleaching, chemical synthesis, photodynamic therapy for tumor treatment, and others. Herein, we report a novel peroxide-dianion-embedded bimetallic macrocycle, [O22–@Ag4Cu4L4]2+ (2), that can completely release the inserted peroxide dianion as the singlet oxygen (1O2) via a H+-assisted
高活性氧(1 O 2)的产生对于各种应用(例如降解,漂白,化学合成,用于肿瘤治疗的光动力疗法等)非常重要。在此,我们报道了一种新型的嵌入双氧阴离子的双金属大环[O 2 2- @Ag 4 Cu 4 L 4 ] 2+(2),它可以完全释放作为单线态氧(1 O 2)插入的双氧阴离子。通过在甲醇中的H +辅助歧化过程。明显地,所得的空的Ag 4 Cu 4 L 4(ClO 4)4(3)能够捕获空气中的氧气(3 O 2)并将其作为过氧化物二价阴离子固定在大环主体中。此外,它在H +存在下再次以1 O 2的形式释放。因此,此处的双金属大环[Ag 4 Cu 4 L 4 ] 4+表现为高效的可重复使用的三重态氧受体和单重态氧产生剂。
Investigation of a halloysite-based fluorescence probe with a highly selective and sensitive “turn-on” response upon hydrogen peroxide
作者:Jingwei Dong、Zhihang Zhao、Rui Liu、Hailei Zhang、Yonggang Wu、Xinwu Ba
DOI:10.1039/c7ra10210k
日期:——
(TEM) confirmed that PA was successfully grafted onto the lumen of HNTs to obtain HNTs-PA with a grafting degree of 6.0%. The established B–C bond endows a selective fluorescence response toward hydrogenperoxide (H2O2) to HNTs-PA. The new hybrid probe exhibited a highly specific “turn-on” fluorescence response to H2O2 over other reactive oxygen species (ROS) and common ions owing to their chemoselective
用有机荧光素衍生物(PA)对无机埃洛石纳米管(HNTs)进行修饰,以制备基于HNTs的杂交荧光探针(HNTs-PA)。热重分析(TGA),傅立叶变换红外光谱(FTIR),固态13 C NMR光谱,X射线光电子能谱(XPS),能量色散光谱(EDS)和透射电子显微镜(TEM)证实PA已成功接枝在HNTs的管腔上获得接枝度为6.0%的HNTs-PA。建立的B–C键赋予HNTs-PA对过氧化氢(H 2 O 2)的选择性荧光响应。新型混合探针对H 2 O 2表现出高度特异性的“开启”荧光响应由于它们具有化学选择性的硼酸酯到苯酚开关,因此比其他活性氧(ROS)和常见离子更容易。当H 2 O 2的添加量限制为1×10 -7 mol时,甚至可以跟踪“开启”响应。此外,人肺癌细胞(A549细胞)已成功染色,并且染色强度随着时间的延长而增强,这可能是由于癌细胞H 2 O 2的过表达所致。因此,准备好的有机-无
A Selective, Cell-Permeable Optical Probe for Hydrogen Peroxide in Living Cells
作者:Michelle C. Y. Chang、Arnd Pralle、Ehud Y. Isacoff、Christopher J. Chang
DOI:10.1021/ja0441716
日期:2004.12.1
We present the synthesis, properties, and biological applications of Peroxyfluor-1 (PF1), a new type of optical probe for intracellular imaging of hydrogen peroxide in living biological samples. PF1 utilizes a boronate deprotection mechanism to provide unprecedented selectivity and optical dynamic range for detecting H2O2 in aqueous solution over similar reactive oxygen species including superoxide, nitric oxide, tert-butyl hydroperoxide, and hydroxyl radical. We further demonstrate the value of this reagent for biological applications by imaging changes in [H2O2] in living mammalian cells.