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麦冬须根高异黄酮类成分及其清除氧自由基作用(英文) 被引量:15

Homoisoflavonoids from Ophiopogon japonicus and Its Oxygen Free Radicals(OFRs) Scavenging Effects
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摘要 目的:研究川麦冬须根中高异黄酮类成分及其清除氧自由基作用。方法:对川麦冬须根提取物高异黄酮类成分进行分离鉴定,并采用化学发光法测定其清除超氧阴离子(O2.-)、羟自由基(.OH)、过氧化氢(H2O2)的能力。结果:分离得到10个高异黄酮类化合物,经鉴定分别为:甲基麦冬黄烷酮A(1)、甲基麦冬黄烷酮B (2)、麦冬黄烷酮A(3)、麦冬黄烷酮E (4)、5,7-dihydroxy-6,8-dimethyl-3-(4′-hydroxy-3′,5′-dimethoxybenzyl) chroman-4-one (5) 、甲基麦冬黄酮A(6)、甲基麦冬黄酮B (7)、去甲基异麦冬黄酮B (8)、5,7,2′-trihydroxy-8-methyl-3-(3′,4′-methylenedioxybenzyl) chromone(9)、5,7,2′-trihydroxy-6,8-dimethyl-3-(3′,4′-methylenedioxybenzyl) chromone (10)。结论:化合物8和9首次从麦冬中分离得到,麦冬中多数高异黄酮类化合物具有不同程度的清除.OH及H2O2作用,活性与其分子结构相关。 AIM: To investigate the OFRs scavenging activities of homoisoflavonoids from the fibrous root of Ophiopogon japonicus. METHODS: The scavenging effect of homoisoflavonoids isolated from O. japonicus extracts was examined on superoxide anion (O2^-), hydroxyl radical (·OH), and hydrogen peroxide (H2O2) by chemiluminescence. RESULTS: Ten homoisoflavonoids were obtained from O. japonicus extracts. They were identified as methylophiopogonanone A (1), methylophiopogonanone B (2), ophiopogonanone A (3), ophiopogonanone E (4), 5,7-dihydroxy-6, 8-dimethyl-3-(4′-hydroxy- 3′, 5′-methoxybenzyl) chroman-4-one (5), methylophiopogonone A (6), methylophiopogonone B (7), desmethylisoophiopogonone B (8), 5, 7, 2′-trihydroxy- 8-methyl-3-( 3′, 4′-methylenedioxybenzyl) chromone (9) and 5, 7, 2′-trihydroxy-6, 8-dimethyl- 3-( 3′, 4′- methylenedioxybenzyl) chromone (10). CONCLUSION: Compounds 8 and 9 were firstly isolated from O. japonicus. The majority of homoisoflavonoids could scavenge-OH and H2O2 in vitro to a certain extent, and their bioactivities should be related with the respective structures.
出处 《中国天然药物》 SCIE CAS CSCD 2008年第3期201-204,共4页
基金 国家自然科学基金(No30672603) 教育部和国家外国专家事务管理局"111"引智计划(No111-2-07)~~
关键词 麦冬 高异黄酮 氧自由基 化学发光 Ophiopogon japonicus Homoisoflavonoids Oxygen free radicals (OFRs) Chemiluminescence
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