食品科学 ›› 2008, Vol. 29 ›› Issue (1): 286-291.

• 营养卫生 • 上一篇    下一篇

通过检测小鼠体内羟自由基含量评价保健食品的抗氧化功能

 文镜, 张西, 常平   

  1. 北京联合大学生物活性物质与功能食品北京市重点实验室; 北京联合大学生物活性物质与功能食品北京市重点实验室 北京100083; 北京100083;
  • 出版日期:2008-01-15 发布日期:2011-07-28

Antioxidant Ability Evaluation of Functional Food by Detecting Hydroxyl Free Radical Level in Mice

 WEN  Jing, ZHANG  Xi, CHANG  Ping   

  1. Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100083, China
  • Online:2008-01-15 Published:2011-07-28

摘要: 建立一种评价保健食品在体内抗氧化功能的检测方法。通过研究羟自由基捕获剂的给药方式、捕获时间、小鼠的敏感组织、组织样品的前处理方法及色谱分离检测条件,优化得到一种检测方法:即采用10月龄以上的老龄健康小鼠,设保健食品剂量组和对照组,每组10~15只,经口给予受试物50d后,尾静脉注射水杨酸钠捕获体内羟自由基,反应60min后处死动物,取肝组织经高效液相色谱仪和紫外检测器分离、检测由水杨酸捕获羟自由基后产生的2,3-二羟基苯甲酸或2,5-二羟基苯甲酸。采用方差分析对实验组及对照组的检测结果进行比较,由此判定该保健食品是否具有清除体内羟自由基的功能。通过口服VC的实验,证实了本方法的可行性。

关键词: 抗氧化保健食品, 功能评价方法, 羟自由基, 水杨酸捕获法

Abstract:  An optimum detecting method in vivo was constructed for evaluating antioxidant ability of functional food. A proper condition was selected by investigating several factors as follows: given modes of hydroxyl radicals trapping agent(salicylic acid), measurement of trapping time period, sensitive drug responded tissue, extraction method of a variety tissue samples, and HPLC separation condition. The experiment was carried out in healthy mice age>10 months. The mice were divided randomly into 2 groups, 10~15 mice for each group. Fed one group with functional food, and the other as control. After 50 days of oral administration for functional food, salicylic acid was injected into the mice tail vein. 60 minutes later, animals were decapitated and liver was rapidly dissected. Hydroxyl free radical level was quantified by measuring the hydroxylation products. 2,3-and 2, 5-dihydroxybenzoic acids (DHBA)formed as a result of the reaction between· OH and salicylate. Then, DHBA and salicylate concentrations were determined using RP-HPLC with UV detection. Compared data from the 2 groups, to determine the antioxidant ability of the functional food. In addition, experiment of oral administration of vitamin C in mice proved the feasibility of this method.

Key words: antioxidant functional food, evaluation method for function food, hydroxyl radicals, salicylic acid trapping