桑叶抗氧化活性成分的研究  被引量:22

Study on Antioxidant Activity of Constituents from Mulberry Leaf

在线阅读下载全文

作  者:姜玉兰[1] 朴惠善[2] 李镐[2] 

机构地区:[1]延边大学基础医学院,吉林延吉133000 [2]延边大学药学院

出  处:《中药材》2008年第4期519-522,共4页Journal of Chinese Medicinal Materials

摘  要:目的:研究桑叶的抗氧化活性成分。方法:以桑叶为原料,经不同方法提取分离桑叶中的有效成分,利用核磁共振等波谱学方法进行结构鉴定,采用DPPH法和ABTS法测定其抗氧化活性。结果:从桑叶中分离鉴定了四个黄酮类化合物,分别为kaempferol-3-O-β-D-glucopyranoside(Ⅰ)、quercetin-3-O-β-D-glucopyranoside(Ⅱ)、quer-citrin(Ⅲ)、morin-3-O-β-Dglucopyranoside(Ⅳ);化合物Ⅲ和Ⅳ对DPPH自由基和ABTS自由基具有较好的清除能力,其半数清除率浓度(IC50)分别为109.3、20.1、9.2、3.6μg/ml,对DPPH自由基和ABTS自由基的清除率呈量效关系。结论:化合物Ⅲ和Ⅳ均有较好的抗氧化活性,其中化合物Ⅳ清除ABTS自由基的能力最强。Objective:To study the chemical constituents with antioxidant activity from mulberry leaf. Methods:Siliga gel column chromatography was used to isolate, and their structures were identified by spectras. Methods:Isolated constituents were tested in vitro for antioxidant activity against 1,1-diphenyl-2-picrylhydrazyl ( DPPH ) and 2, 2 ' -azino-bis ( 3-ethylbenzthiazoline-6-sulfonic acid ) ( ABTS^ + ) radicals. Results : Four known flavonoids were isolated from mulberry leaf and their structures were identified as kaempferol-3- O-β-D-glucopyranoside( Ⅰ ) , quercetin-3-O-β-D-glucopyranoside ( Ⅱ ) , quercitrin (Ⅲ ) , morin-3-O-β-D-glucopyranoside ( IV ) . All these compounds showed DPPH and ABTS^+ radicals scavenging activity. Conclusion : Compound IV has the strongest ABTS^+ radicals scavenging effects.

关 键 词:桑叶 黄酮类化合物 DPPH自由基 ABTS自由基 清除作用 

分 类 号:R284.2[医药卫生—中药学] R285.5[医药卫生—中医学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象