高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (6): 1073.

• 研究简报 • 上一篇    下一篇

小分子玉米肽Leu-Asp-Tyr-Glu保护线粒体抗氧化损伤的研究

徐力1, 李相鲁1, 黄宜兵1, 吴晓霞1, 侯瑞珍1, 王华2, 王娜1, 张学忠1   

  1. 1. 吉林大学分子酶学工程教育部重点实验室, 长春 130023;
    2. 吉林大学中日联谊医院, 长春 130031
  • 收稿日期:2003-05-30 出版日期:2004-06-24 发布日期:2004-06-24
  • 通讯作者: 张学忠(1942年出生),男,教授,博士生导师,从事生物化学与酶工程研究.E-mail:zhangxz@mai.ljlu.edu.cn E-mail:zhangxz@mai.ljlu.edu.cn
  • 基金资助:

    国家“十五”科技攻关计划项目(批准号:2001BA747C)资助

Protection of Small Molecule Corn Peptide Leu-Asp-Tyr-Glu from Mitochondria Against Oxidative Damage

XU Li1, LI Xiang-Lu1, HUANG Yi-Bing1, WU Xiao-Xia1, HOU Rui-Zhen1, WANG Hua2, WANG Na1, ZHANG Xue-Zhong1   

  1. 1. Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, Jilin University, Changchun 130023;
    2. China-Japan Union Hospital of Jilin University, Changchun 130031, China
  • Received:2003-05-30 Online:2004-06-24 Published:2004-06-24

摘要: 线粒体是细胞内氧代谢的主要场所,其膜上富含不饱和脂肪酸,使得线粒体成为自由基进攻的主要靶部位[1].自由基作用于线粒体膜发生脂质过氧化损伤反应,引起膜的结构与功能改变,使得膜上一系列重要的酶空间排列紊乱,活性降低,膜的通透性改变,诱发多种疾病[2].目前,抗氧化肽类作为一种非酶类自由基清除剂的研究正在兴起[3].来源于玉米醇溶蛋白酶降解物中的低分子量肽具有许多重要的生理功能,如促进乙醇代谢、抗疲劳作用以及降血脂等功效[4].而这些功能的实现主要依赖于其抗氧化活性[5].最近,我们从玉米蛋白酶解物中获得了一种新的小分子抗氧化肽Leu-Asp-Tyr-Glu(LD YE,LD YE经文献检索为一种新的寡肽)[6].

关键词: 玉米肽, 线粒体, 抗氧化活性

Abstract: A small molecule peptide Leu-Asp-Tyr-Glu(LDYE) prepared from the enzymatic hydrolysate of zein was tested for its anti-oxidative activities. The effects of LDYE on the turgidity of mitochondria,the fluidity of membrane,the activity of cytochrome C oxidase and ATPase at subcellular level were investigated by using H2O2/Fe2+-induced mitochondria damage model system. It was found that the small peptide exhibited an obvious ability of removing free radicals and protecting the mitochondria from damage by oxidation.

Key words: Corn peptide, Mitochondria, Anti-oxidation activity

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