Design and synthesis of gambogic acid analogs as potent cytotoxic and anti-inflammatory agents
作者:Chiao-Ting Yen、Kyoko Nakagawa-Goto、Tsong-Long Hwang、Susan L. Morris-Natschke、Kenneth F. Bastow、Yang-Chang Wu、Kuo-Hsiung Lee
DOI:10.1016/j.bmcl.2012.04.084
日期:2012.6
Prenyl-and pyrano-xanthones derived from 1,3,6-trihydroxy-9H-xanthen-9-one, a basic backbone of gambogic acid (GA), were synthesized and evaluated for in vitro cytotoxic effects against four human cancer cell lines (KB, KBvin, A549, and DU-145) and anti-inflammatory activity toward superoxide anion generation and elastase release by human neutrophils in response to fMLP/CB. Among them, prenylxanthones 7-13 were generally less active than pyranoxanthones 14-21 in both anticancer and anti-inflammatory assays. Furthermore, two angular 3,3-dimethypyranoxanthones (16 and 20) showed the greatest and selective activity against the KBvin multidrug resistant (MDR) cell line with IC50 values of 0.9 and 0.8 mu g/mL, respectively. An angular 3-methyl-3-prenylpyranoxanthone (17) selectively inhibited elastase release with 200 times more potency than phenylmethylsulfonyl fluoride (PMSF), the positive control. (C) 2012 Elsevier Ltd. All rights reserved.