A new fluorescent probe with ultralow background fluorescence for imaging of endogenous cellular selenol under oxidative stress
摘要:
A new fluorescent probe (Rhod-Sec) for selenol detection with ultralow background fluorescence have been developed in this paper, which showed a 380-fold off-on fluorescence response, and the nontoxic Rhod-Sec is well suitable for detecting and imaging both exogenous and endogenous selenol in living cells. It also can be applied to visualize the fluctuation of selenol in HepG2 cells through LPS-induced cells oxidation resistance. (C) 2017 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
content in cells by fluorescence probe is of great significance for the identification of human related diseases. To achieve fast and sensitive detection of Sec, two isomers A4 and B4 as turn-on fluorescent probes to detect Sec were designed and synthesized. Both A4 and B4 display fast turn-on response, high selectivity and sensitivity toward Sec, which can be applied for fluorescence imaging of Sec in
Mitochondria-Targeted Chemotherapeutics: The Rational Design of Gold(I) <i>N</i>-Heterocyclic Carbene Complexes That Are Selectively Toxic to Cancer Cells and Target Protein Selenols in Preference to Thiols
作者:James L. Hickey、Rasha A. Ruhayel、Peter J. Barnard、Murray V. Baker、Susan J. Berners-Price、Aleksandra Filipovska
DOI:10.1021/ja804027j
日期:2008.9.24
A family of lipophilic, cationic Au(I) complexes of N-heterocyclic carbenes (NHCs) have been designed as new mitochondria-targeted antitumor agents that combine both selective mitochondrial accumulation and selective thioredoxin reductase inhibition properties within a single molecule. Two-step ligand exchange reactions with cysteine (Cys) and selenocysteine (Sec) occur with release of the NHC ligands. At physiological pH the rate constants for the reactions with Sec are 20- to 80-fold higher than those with Cys. The complexes are selectively toxic to two highly tumongenic breast cancer cell lines and not to normal breast cells, and the degree of selectivity and potency are optimized by modification death through a mitochondrial apoptotic pathway and to inhibit the activity of thioredoxin reductase (TrxR) but not the closely related and Se-free enzyme glutathione reductase.