Chemical Constituents of<i>Alnus firma</i>and Their Inhibitory Activity on Lipopolysaccharide-Induced Nitric Oxide Production in BV2 Microglia
作者:Min Lee、Hee Lee、Seung Kim、Young Kim、Sang Sung
DOI:10.1055/s-0029-1240911
日期:2010.7
A methanolic extract of Alnus firma barks (Betulaceae) significantly attenuated nitric oxide production in lipopolysaccharide-stimulated BV2 microglia. Two new compounds, characterized as 4-hydroxy-2,6-dimethoxyphenyl 6′-O-syringoyl-β-D-glucopyranoside (1) and 4-hydroxy-2,6-dimethoxyphenyl 6′-O-vanilloyl-β-D-glucopyranoside (2), were isolated from the barks of A. firma using bioactivity-guided fractionation, together with two known phenolic glycosides (3, 4) and 11 known diarylheptanoids (5–15). Among these compounds, 1–4 and 6–11 showed significant inhibitory effect on lipopolysaccharide-induced nitric oxide production in BV2 microglial cells at concentrations ranging from 10 µM to 100 µM.
Alnus firma树皮(桦木科)的甲醇提取物能显著减少脂多糖刺激的BV2小胶质细胞产生的一氧化氮。采用生物活性指导方法,从桦木树皮中分离出了两种新化合物,分别为 4-羟基-2,6-二甲氧基苯基 6′-O-丁香酰-δ²-D-吡喃葡萄糖苷(1)和 4-羟基-2,6-二甲氧基苯基 6′-O-香草酰-δ²-D-吡喃葡萄糖苷(2)。在生物活性指导下进行分馏,从 A firma 树皮中分离出了两种已知的酚苷类化合物(3、4)和 11 种已知的二芳基庚酸类化合物(5-15)。在这些化合物中,1-4 和 6-11 在 10 µM 到 100 µM 的浓度范围内对脂多糖诱导的 BV2 微神经胶质细胞一氧化氮的产生有显著的抑制作用。