4-3--5--tri-o-methylpiceatannol has been researched along with aloe-emodin* in 1 studies
1 other study(ies) available for 4-3--5--tri-o-methylpiceatannol and aloe-emodin
| Article | Year |
|---|---|
Effects of stilbene constituents from rhubarb on nitric oxide production in lipopolysaccharide-activated macrophages.
Two new anthraquinone glucosides [chrysophanol 8-O-beta-D-(6'-galloyl)-glucopyranoside, aloe-emodin 1-O-beta-D-glucopyranoside] together with various known stilbenes and their glucosides, anthraquinone glucosides, and a naphthalene glucoside were isolated from the rhizome of Rheum undulatum L. Three stilbenes (rhapontigenin, piceatannol, resveratrol), a naphthalene glucoside (torachrysone 8-O-beta-D-glucopyranoside), and two stilbene glucoside gallates (rhaponticin 2''-O-gallate, rhaponticin 6''-O-gallate) showed inhibitory activity of NO production in lipopolysaccharide-activated macrophages, (IC50 = 11-69 microM). The oxygen functions (-OH,-OCH3) at the benzene ring were found to be essential to show the activity. Whereas, the glucoside moiety reduced the activity, while the alpha,beta-double bond did not affect the activity. Furthermore, the active stilbenes (rhapontigenin, piceatannol, resveratrol) inhibited iNOS induction. Topics: Anthraquinones; Emodin; Gallic Acid; Glucosides; Lipopolysaccharides; Macrophage Activation; Macrophages; Naphthalenes; Nitric Oxide; Nitric Oxide Synthase; Nitric Oxide Synthase Type II; Nitrites; Plant Extracts; Plants, Medicinal; Rheum; Stilbenes; Structure-Activity Relationship | 2000 |