Inhibitors from rhubarb on lipopolysaccharide-induced nitric oxide production in macrophages: Structural requirements of stilbenes for the activity

被引:74
作者
Kageura, T [1 ]
Matsuda, H [1 ]
Morikawa, T [1 ]
Toguchida, I [1 ]
Harima, S [1 ]
Oda, M [1 ]
Yoshikawa, M [1 ]
机构
[1] Kyoto Pharmaceut Univ, Yamashina Ku, Kyoto 6078412, Japan
关键词
D O I
10.1016/S0968-0896(01)00093-1
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
By bioassay-guided separation, three stilbenes (rhapontigenin, piceatannol, and resveratrol), two stilbene glucoside gallates (rhaponticin 2''-O-gallate and rhaponticin 6"-O-gallate), and a naphthalene glucoside (torachrysone 8-O-beta -D-glucopyranoside) with inhibitory activity against nitric oxide (NO) production in lipopolysaccharide-activated macrophages were isolated (IC50 = 11-69 muM). The oxygen functions (-OH, -OCH3) of stilbenes at the benzene ring were essential for the activity. The glucoside moiety reduced the activity, while the alpha,beta -double bond had no effect. Furthermore, the active stilbenes (rhapontigenin, piceatannol, and resveratrol) did not inhibit inducible NO synthase activity, but they inhibited nuclear factor-kappaB activation following expression of inducible NO synthase. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1887 / 1893
页数:7
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