食品科学

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昆仑雪菊黄酮类化合物的抗氧化相互作用研究

丁 豪1,2,杨海燕1,*,辛志宏2,*   

  1. 1.新疆农业大学食品科学与药学学院,新疆 乌鲁木齐 830052;2.南京农业大学食品科技学院,江苏 南京 210095
  • 出版日期:2015-11-15 发布日期:2015-12-03

Antioxidant Interaction of Flavonoids from Coreopsis tinctoria Nutt.

DING Hao1,2, YANG Haiyan1,*, XIN Zhihong2,*   

  1. 1. College of Food Science and Pharmacy, Xinjiang Agricultural University, Ürümqi 830052, China;
    2. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
  • Online:2015-11-15 Published:2015-12-03

摘要:

目的:选取昆仑雪菊中5 种具有强抗氧化活性的黄酮类化合物马里苷、金鸡菊噢、黄杉素、紫铆因和奥卡宁,研究其抗氧化相互作用。方法:以1,1-二苯基-2-三硝基苯肼(1,1-dinhenyl-2-picrylhydrazyl,DPPH)自由基清除能力为指标,采用Chou-Talalay中效原理设计实验,分析抗氧化相互作用。结果:金鸡菊噢与紫铆因、黄杉素与紫铆因之间具有抗氧化中等协同作用,它们对清除DPPH自由基的加权平均联合作用指数(weighted averagecombination index,CIwt)值分别为0.824和0.749。另外,金鸡菊噢与紫铆因复配时,当半抑制浓度(IC50)大于1且CIwt值小于0.90时,出现协同效应。3 种化合物联合使用时,清除DPPH自由基的CIwt值均大于1,不存在协同抗氧化作用。结论:昆仑雪菊中黄酮类化合物之间的抗氧化相互作用关系与化合物的结构和浓度有关。

关键词: 黄酮类化合物, 抗氧化, 中效原理, 相互作用

Abstract:

Objective: To study the interaction of five powerful antioxidant flavonoids isolated from Coreopsis tinctoria
Nutt. including marein, maritimetin, taxifolin, butein and okanin. Methods: The DPPH scavenging capacity was used as
the indicator of antioxidant activity, and Chou-Talalay method was used to analyze antioxidant interactions among these
flavonoids. Results: There was moderate synergistic antioxidant interaction between maritimetin and butein, and between
taxifolin and butein with weighed average combination index (CIwt) values of 0.824 and 0.749 for scavenging 1,1-diphenyl-
2-picrylhydrazyl (DPPH) free radical, respectively. In addition, the IC50 for maritimetin combined with butein was higher
than 1, and the CIwt value was less than 0.90, suggesting an obvious synergistic interaction. Nevertheless, a combination of
maritimetin, butein and taxifolin scavenged DPPH free radical with a CI value of higher than 1.0, indicating no synergistic
interaction among these three antioxidants. Conclusion: The structure and concentration of flavonoids from Coreopsis
tinctoria Nutt. can influence their antioxidant interaction.

Key words: flavonoids, antioxidant, Chou-Talalay method, interaction

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