Nitric oxide inhibitory isopimarane-type diterpenes from Orthosiphon stamineus of Indonesia

被引:42
作者
Awale, S [1 ]
Tezuka, Y [1 ]
Banskota, AH [1 ]
Adnyana, IK [1 ]
Kadota, S [1 ]
机构
[1] Toyama Med & Pharmaceut Univ, Inst Nat Med, Sugitani, Toyama 9300194, Japan
来源
JOURNAL OF NATURAL PRODUCTS | 2003年 / 66卷 / 02期
关键词
D O I
10.1021/np020455x
中图分类号
Q94 [植物学];
学科分类号
071001 [植物学];
摘要
A methanolic extract of Orthosiphon stamineus yielded six new highly oxygenated isopimarane-type diterpenes, orthosiphols U-Z (1-6), and 15 previously reported diterpenes. The isolated diterpenes all showed significant dose-dependent inhibitory effects on the nitric oxide (NO) production in lipopolysaccharide (LPS)-activated macrophage-like J774.1 cells. Orthosiphols A (7), B (8), D (9), and X (4) showed more potent inhibitory activities than a positive control, N-G-monomethyl-L-arginine (L-NMMA), and 1 displayed the strongest activity with an IC50 value of 6.4 muM.
引用
收藏
页码:255 / 258
页数:4
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