食品科学 ›› 2018, Vol. 39 ›› Issue (7): 119-124.doi: 10.7506/spkx1002-6630-201807018

• 基础研究 • 上一篇    下一篇

菊苣酸对蛋白质氧化损伤的作用

肖海芳1,杨淑青1,王旭光1,王 静2,宋元达1,*   

  1. 1.山东理工大学农业工程与食品科学学院,山东 淄博 255000;2.陕西科技大学食品与生物工程学院,陕西 西安 710021
  • 出版日期:2018-04-15 发布日期:2018-04-17
  • 基金资助:
    山东省自然科学基金青年基金项目(ZR2014CQ002);淄博市校城融合计划发展项目(2017ZBXC004)

Effect of Chicoric Acid on Oxidative Protein Damage

XIAO Haifang1, YANG Shuqing1, WANG Xuguang1, WANG Jing2, SONG Yuanda1,*   

  1. 1. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China; 2. School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
  • Online:2018-04-15 Published:2018-04-17

摘要: 目的:评价菊苣酸对自由基诱导蛋白质氧化损伤的影响。方法:采用Cu2+/H2O2和2,2’-偶氮二(2-甲基丙 基咪)二盐酸盐(2,2’-azobis(2-methylpropionamidine)dihydrochloride,AAPH)两种不同的自由基诱导体系,分别 诱导牛血清白蛋白(bovine serum albumin,BSA)、小鼠肝脏蛋白和脑蛋白氧化损伤,研究菊苣酸对蛋白氧化损 伤的影响;通过十二烷基硫酸钠-聚丙烯酰胺凝胶电泳和蛋白免疫印迹法检测蛋白氧化损伤程度。结果:菊苣酸在 100~1 000 μmol/L浓度范围内能够抑制Cu2+/H2O2诱导的BSA氧化损伤;低浓度菊苣酸对Cu2+/H2O2诱导的小鼠肝脏 蛋白和脑蛋白氧化损伤具有保护作用,但在高浓度时表现出促氧化作用;在AAPH诱导体系中,菊苣酸对3 种蛋白 模型均具有保护作用,且菊苣酸浓度越高保护效果越好。结论:在Cu2+/H2O2和AAPH两种诱导体系中,菊苣酸对蛋 白质氧化损伤表现出不同的作用效果。

关键词: 菊苣酸, 蛋白质, 氧化损伤, Cu2+/H2O2, 烷氧自由基

Abstract: The effect of chicoric acid on free radical-induced oxidative damage to proteins was evaluated in this paper. Two different paradigms including metal-catalyzed oxidation induced by Cu2+/H2O2 and alkylperoxyl radicals formed by azo initiator 2, 2’-azobis (2-amidinopropane) hydrochloride (AAPH) were used to induce oxidative damage to proteins including bovine serum albumin (BSA) and mouse liver and brain proteins. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and Western blot were applied to determine the level of oxidative protein damage. Results showed that chicoric acid in the range of 100–1 000 μmol/L significantly inhibited oxidative protein damage induced by Cu2+/H2O2. However, chicoric acid at high concentration could induce oxidative damage to mouse tissue proteins. Chicoric acid protected the proteins against oxidative damage induced by AAPH-derived alkylperoxyl radicals in a dose-dependent manner. In conclusion, chicoric acid has different protective effects on oxidative protein damage in both paradigms.

Key words: chicoric acid, protein, oxidative damage, Cu2+/H2O2, alkylperoxyl radicals

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