期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2011, 期 28, 页码 5577-5586出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201100573
关键词
Quercetin; Cyclic voltammetry; DPPH assay; Cytotoxicity; Reactive oxygen species; Triphenylphosphonium salts
资金
- Fondazione Cassa di Risparmio di Padova e Rovigo (Fondazione CARIPARO)
- University of Padova [PRAT CPDA081128/08]
- Italian Association for Cancer Research (AIRC)
Mitochondria-targeted redox-active polyphenol derivatives are being developed to affect redox processes in the organelles and as tools either to protect cells from oxidative damage or to precipitate their death. The properties of such compounds may be altered by substituents introduced to enhance mitochondrial delivery. Accordingly, we have characterized the redox behaviour of two isomeric mitochondriotropic quercetin-based compounds, 3O- and 7O-[4-triphenylphosphonio)butyl]quercetin iodide. In both cyclic voltammetric determinations of the oxidation potential and in 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assays, the 7-substituted isomer behaved much like quercetin itself, whereas the 3-substituted isomer was less reactive. Low mu M concentrations of either compound increased superoxide radical anion formation in cultured cells; both compounds were also cytotoxic. The 7-substituted derivative proved to be more active in both types of assays, thus emerging as the isomer of choice for further bioactivity studies and in efforts to understand the link between redox properties, pro-oxidant behaviour and cytotoxicity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据