食品科学

• 基础研究 • 上一篇    下一篇

槌果藤乙醇提纯物保护酿酒酵母免受氧化损伤机制研究

张 鹏1,王向星2,杨雅萍2,李士明3,赵 辉2,骆焱平1,*   

  1. 1.海南大学热带农林学院,海南 海口 570228;2.天津商业大学 天津市食品生物技术重点实验室,天津 300134;3.黄冈师范学院 湖北省经济林种质资源改良与资源重点实验室,湖北 黄冈 438000
  • 出版日期:2017-04-15 发布日期:2017-04-24

The Alcoholic Extract of Capparis zeylanica Linn Protects against Oxidative Damage in Saccharomyces cerevisiae: An Investigation into the Mechanism

ZHANG Peng1, WANG Xiangxing2, YANG Yaping2, LI Shiming3, ZHAO Hui2, LUO Yanping1,*   

  1. 1. Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China;
    2. Tianjin Key Laboratory of Food Biotechnology, Tianjin University of Commerce, Tianjin 300134, China;
    3. Hubei Provincial Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Huanggang Normal University, Huanggang 438000, China
  • Online:2017-04-15 Published:2017-04-24

摘要: 采用AB-8大孔树脂纯化槌果藤乙醇浸提物,得到槌果藤乙醇提纯物(alcoholic extract of Capparis zeylanicaLinn,AECZ)。体外1,1-二苯基-2-三硝基苯肼自由基和羟自由基清除实验表明AECZ具有较强的自由基清除能力。之后采用酿酒酵母BY4741及其基因缺失型(Ctt1、Sod1、Gsh1、Gtt1和Gtt2)探索AECZ对氧化应激条件下对酵母细胞的保护作用。结果表明AECZ能明显地提高酵母细胞对于H2O2、CCl4和CdSO4氧化应激的耐受性,同时能明显地降低应激状态下酵母的脂质过氧化和细胞内氧化水平。GTT1基因在AECZ减轻氧化应激下酵母损伤中发挥重要的作用。本实验验证了AECZ在细胞内具有显著的抗氧化活性,可为进一步开发利用槌果藤提供理论依据。

关键词: 槌果藤, 抗氧化, 酿酒酵母, 细胞内氧化, 脂质过氧化

Abstract: The crude alcoholic extract of Capparis zeylanica Linn (AECZ) was purified through AB-8 macroporous resin. The in vitro tests indicated that AECZ had potent hydroxyl radical and (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activities. The cytoprotection of AECZ in Saccharomyces cerevisiae BY4741 and its homogenous strains deficient in antioxidant enzyme genes under oxidative stress induced by H2O2, CCl4 and CdSO4 was explored. Interestingly, AECZ could dramatically protect yeasts against oxidative stresses induced by H2O2, CCl4 and CdSO4. Adaptive treatment with AECZ could reduce the level of intracellular lipid peroxidation and reactive oxygen species in yeasts under stress conditions. Moreover, the GTT1 gene played an important role in alleviating oxidative damage in yeast cells. This study for the first time demonstrated the intracellular antioxidant activity of AECZ, which will provide theoretical evidence for further exploitation and utilization of Capparis zeylanica Linn.

Key words: Capparis zeylanica Linn, antioxidant, Saccharomyces cerevisiae, cellular oxidation, lipid peroxidation

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