Inhibitory Effects of 6-Alkoxycoumarin and 7-Alkoxycoumarin Derivatives on Lipopolysaccharide/Interferon γ-Stimulated Nitric Oxide Production in RAW264 Cells
作者:Morina Adfa、Tomohiro Itoh、Yosuke Hattori、Mamoru Koketsu
DOI:10.1248/bpb.35.963
日期:——
Coumarin and its derivatives are well known for their anti-inflammatory and anti-oxidative effects. In this study, we synthesized 32 coumarin derivatives from commercially available 6-hydroxycoumarin (6HC) and 7-hydroxycoumarin (7HC) and examined their effects on lipopolysaccharide/interferon γ (LPS/IFNγ)-stimulated nitric oxide (NO) production in murine macrophage RAW264 cells. Among these derivatives, 6HC-8 (6-(3-phenylpropoxy)coumarin), 6HC-14 (6-(2-octynyloxy)coumarin), 7HC-14 (7-(2-octynyloxy)coumarin), and 7HC-16 (7-(3,5-dimethoxybenzyloxy)coumarin) markedly suppressed NO production at low concentration (25 µM). These synthesized coumarin derivatives also markedly inhibited inducible NO synthase (iNOS) protein and mRNA expression, as assessed by western blotting and quantitative real time-polymerase chain reaction (RT-PCR).
众所周知,香豆素及其衍生物具有抗炎和抗氧化作用。在这项研究中,我们从市售的 6-羟基香豆素(6HC)和 7-羟基香豆素(7HC)中合成了 32 种香豆素衍生物,并考察了它们对鼠巨噬细胞 RAW264 在脂多糖/干扰素γ(LPS/IFNγ)刺激下产生一氧化氮(NO)的影响。在这些衍生物中,6HC-8(6-(3-苯基丙氧基)香豆素)、6HC-14(6-(2-辛炔氧基)香豆素)、7HC-14(7-(2-辛炔氧基)香豆素)和 7HC-16(7-(3,5-二甲氧基苄氧基)香豆素)在低浓度(25 µ<小>M<小>)下明显抑制了一氧化氮的产生。这些合成的香豆素衍生物也明显抑制了诱导型 NO 合酶(iNOS)蛋白和 mRNA 的表达,这可以通过 Western 印迹和定量实时聚合酶链反应(RT-PCR)进行评估。