COMPOUND BASED ON CYANINE SCAFFOLD FOR DIAGNOSIS SEPSIS BY SELECTIVELY DETECT GLUTATHIONE
申请人:EWHA UNIVERSITY - INDUSTRY COLLABORATION FOUNDATION
公开号:US20160083344A1
公开(公告)日:2016-03-24
The present invention relates to a compound based on cyanine scaffold for diagnosing sepsis by selectively detecting glutathione. The compound based on cyanine scaffold according to the present invention has the advantages of maintaining its structure in intracellular environment and of reacting selectively to glutathione only among many amino acids containing thiol group (R—SH) such as cysteine, homocysteine, and glutathione, to produce changes in absorption or fluorescence spectrum, making the compound useful for the detection of in vivo glutathione in biosamples and also for the diagnosis of sepsis characteristically displaying the changes of glutathione concentration.
A new H<sub>2</sub>S-specific near-infrared fluorescence-enhanced probe that can visualize the H<sub>2</sub>S level in colorectal cancer cells in mice
作者:Kun Zhang、Jie Zhang、Zhen Xi、Lu-Yuan Li、Xiangxiang Gu、Qiang-Zhe Zhang、Long Yi
DOI:10.1039/c6sc05646f
日期:——
A highly sensitive H2S-specific near-infrared fluorescence-enhanced probe was developed for real-time imaging of endogenous H2S in colorectal cancer cells (HCT116 and HT29) in mice.
A novel ratiometric and colorimetric fluorescent chemosensor based on tricarbocyanine (1) for Ag+ has been designed and synthesized. In comparison with Ag+ chemosensors reported, our chemosensor can detect Ag+ in aqueous solution by both color changes and fluorescent ratio changes with long emission wavelength. Upon addition of Ag+ to solutions of 1, observable color change from blue to light red and remarkable shift from 758 nm to 565 nm in emission spectra occur. Under optimized experimental conditions, the chemosensor exhibits a stable response to Ag+ over a concentration range from 5.0 x 10(-7) to 2.0 x 10(-5) M, with a detection limit to 2.0 x 10(-7) M. Most importantly, the fluorescence changes of the chemosensor are remarkably specific for Ag+ over other metal ions. In addition, the proposed chemosensor has been successfully applied for the determination of Ag+ in real water samples which demonstrates its value of practical applications in environment. (C) 2013 Elsevier Ltd. All rights reserved.