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第 39 卷第 2 期Vol. 39 No. 2
2009 年 4 月Apr 2009

所屬欄目:醫藥及中間體

拳參抗氧化活性研究
常 星,劉瑜新,康文藝* (河南大學(xué) 天然藥物研究所,河南 開(kāi)封 475004)
摘 要:用清除二苯代苦味;―PPH)自由基、2,2'-連氨-(3-乙基苯并噻唑啉-6-磺酸)二氨鹽(ABTS)自由基和鐵離子還原/抗氧化能力(FRAP)測定法對拳參體外總抗氧化活性進(jìn)行評價(jià),并與6-羥基-2,5,7,8-四甲基苯并二氫吡喃-2-羧酸(Trolox)及陽(yáng)性對照二丁基羥基甲苯(BHT)比較。發(fā)現拳參有較好的體外抗氧化活性。甲醇提取物清除DPPH自由基(IC50=3.81 μg/mL)的能力遠遠強于BHT的清除能力(IC50=18.71 μg/mL);清除ABTS自由基能力(IC50=7.65 μg/mL)強于BHT(IC50=7.72 μg/mL)的清除能力;還原Fe3+的能力(FRAP=2 009.51±16.44 μmol TE/g)最強,強于BHT(FRAP=1 581.68±97.41 μmol TE/g)。在3種提取物中,甲醇提取物具有最高的抗氧化能力,乙酸乙酯提取物次之。3種方法中,ABTS方法和FRAP方法相關(guān)性(R=0.984)最高。
關(guān)鍵詞:中藥現代化技術(shù);拳參;體外抗氧化活性;DPPH方法;ABTS方法;FRAP方法
中圖分類(lèi)號:Q946.81  文獻標識碼:A  文章編號:1009-9212(2009)02- 0028-04
Antioxidant Activity of Extracts from Polygonum bistorta L.
CHANG Xing,LIU Yu-xin,KANG Wen-yi* (Institute of Natural Products,Henan University,Kaifeng 475004,China)
Abstract:The antioxidant activity of extracts from Polygonum bistorta L. was assayed by three methods,namely,1,1-diphenyl-2-picryl-2-picrylhydrazyl(DPPH)radical scavenging,〔2,2′ -azino-bis-3-ethylbenzothiazoline-6-sulfonic acid〕diammonium salt(ABTS)radical scavenging,and ferric reducing/antioxidant power(FRAP)assay. The results were compared with 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid(Trolox)and positive control 2,6-di-tert-butyl-4-methylphenol(BHT). The results showed that P. bistorta L. had good antioxidant activity in vitro. The methanol extract from P. bistorta L. showed higher DPPH and ABTS radical scavenging activity(IC50=3.81 μg/mL and IC50=7.65 μg/mL,respectively)than that of BHT(IC50=18.71 μg/mL and IC50=7.72 μg/mL,respectively). It exhibited higher ferric reducing activity(FRAP value=2 009.51±16.44 μmol TE/g)than that of BHT(FRAP value=1 581.68±97.41 μmol TE/g). Among three extracts of P. bistorta L.,the methanol extract showed the highest antioxidant activity,followed by ethyl acetate extract. The results among the three methods were consistent,and the values obtained by ABTS assay were correlated best with those obtained by FRAP assay(R=0.984).
Key words:modernized technology of traditional chinese medicines;polygonum bistorta L.;antioxidant activity;DPPH assay;ABTS assay;FRAP assay
基金項目:河南省教育廳基礎研究計劃(2008A360002),河南省教育廳青年骨干教師資助計劃(2008)。
作者簡(jiǎn)介:常 星(1986-),女,河南洛陽(yáng)人,碩士研究生,主要從事天然產(chǎn)物化學(xué)研究。(E-mail:starfly016@163.com)
聯(lián) 系 人: 康文藝,教授,從事中藥活性成分及新藥研究。(E-mail:kangweny@hotmail.com)
收稿日期:2009-03-05
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