Zerumbonoquinone 10 and zerumbonaminone 11 have been designed to release toxic moieties selectively and preferentially under reductive conditions. These compounds were synthesized by coupling the quinone delivery system with zerumbone alcohol 8 and amine 9. All compounds were evaluated for cytotoxicity against KB (non reductase overexpressing cells), NCI-H187 and MCF-7 (reductase overexpressing cells) and normal cells (Vero cells). Bioreductive compounds 10 and 11 were found to act as bioreductive anticancer agents exhibiting less cytotoxicity than the parents 8 and 9 in KB cells with good stability, and were partially bioreductively active against MCF-7 and NCI-H187 cells.
Zerumbone 1, having powerful latent reactivity and containing two conjugated double bonds and a double conjugated carbonyl group is the major component of the essential oil of wild ginger, Zingiber zerumbet Smith. The conjugation system plays an important role in the expression of biological activity. N-Bromosuccinimide (NBS) reaction of 1 gave high reactive intermediate 2 with an exo-methylene group, which was obtained from 1 quantitatively. Treatment of 2 with nucleophiles gave various zerumbonependant derivatives, including C-H, C-O, C-N, and C-C bond formation, maintaining the conjugation system through S(N)2'-type reaction. Almost all zerumbone-pendant derivatives showed a good value of IC50 against the suppressive effect of NO generation. Among them, amine derivative 5, binding with 2 mol of zerumbone, showed the strongest activity (IC50: 0.24 mu M). (C) 2013 Elsevier Ltd. All rights reserved.
Target profiling of zerumbone using a novel cell-permeable clickable probe and quantitative chemical proteomics
作者:Karunakaran A. Kalesh、James A. Clulow、Edward W. Tate
DOI:10.1039/c4cc09527h
日期:——
The first target profile for zerumbone in live cancer cells determined through quantitative competitive chemical proteomics with a cell-permeable probe.