原核表达的萝卜PHGPx和谷胱甘肽对NIH3T3细胞氧化损伤的联合保护作用

doi:Q789

中国生物工程杂志

2010, Vol. 30

Issue (09): 13-18 DOI: Q789

研究报告

原核表达的萝卜PHGPx和谷胱甘肽对NIH3T3细胞氧化损伤的联合保护作用

刘冠兰¹,李甜¹,刘进元¹,严泽民²,段明星^1**

1.清华大学生命科学学院北京 100084
2.江苏隆力奇生物科技股份有限公司常熟 215555

Protection Effects of Prokaryotic Expressed Radish Phospholipid Hydroperoxide Glutathione Peroxidase and Glutathione on Hydroperoxidemediated Injury in Mouse NIH3T3 Fibroblasts

LIU Guan-lan¹,LI Tian¹,LIU Jin-yuan¹,YAN Ze-min²,DUAN Ming-xing¹

1.School of Life Sciences, Tsinghua University, Beijing100084, China
2.Jiangsu Longliqi Bioscience Co. Ltd., Changshu 215555, China

全文: PDF(927 KB) HTML

摘要：

将大肠杆菌中高效表达的萝卜磷脂氢谷胱甘肽过氧化物酶(RsPHGPx)及其底物还原型谷胱甘肽(GSH)联合作用于H2O2、过氧化叔丁基(t-BHP)以及磷脂氢过氧化物(PLPCOOH)损伤的小鼠NIH3T3成纤维细胞，研究其对于细胞过氧化损伤的保护作用。发现单独加入10 μg/ml RsPHGPx并不能明显保护细胞应对过氧化损伤，但是10 μg/ml RsPHGPx与3 mg/ml GSH共同作用，可显著提高GSH对细胞过氧化损伤的保护效果，提高细胞存活率，降低细胞膜脂质过氧化水平和胞内活性氧(ROS)水平，保护细胞维持形态完整和抑制细胞凋亡。这一联合作用结果说明RsPHGPx的催化作用可以快速清除细胞内多种过氧化物，高效地保护细胞免受过氧化损伤，为RsPHGPx的应用提供了实验依据。

关键词： 萝卜PHGPx; 谷胱甘肽; 过氧化物损伤; 小鼠NIH3T3成纤维细胞

Abstract:

The radish phospholipid hydroperoxide glutathione peroxidase (RsPHGPx) fusion proteins expressed in Escherichia coli with high efficiency were purified and the antioxidant effects of RsPHGPx together with glutathione on hydroperoxide-mediated injury in mouse NIH3T3 fibroblasts were investigated. The cell viability measurement confirmed that 10μg/ml RsPHGPx, when added to the fibroblasts separately, can only slightly increase the cell viability. However, when combained with glutathione, the antioxidant effects increase dramatically. MDA assay suggests that RsPHGPx can scaveng the lipid peroxides, the results are accordance with the MTT results. ROS flourescence investigations and DAPI experiments show that RsPHGPx can increase the protection effect via inhibiting ROS genreation and this protection help maintain the normal nuclear and membrane conditions of NIH3T3 fibroblasts. This combain experiment of RsPHGPx and glutathione provides experimental evidences for the future production of RsPHGPx.

Key words: Radish PHGPx Glutathione Hydroperoxide-mediated injury Mouse NIH3T3 fibroblasts

收稿日期: 2010-04-13 出版日期: 2010-08-25

基金资助:

国家“863”计划(2007AA100604)、国家“转基因生物新品种培育”科技重大专项(2008ZX08009003)资助项目

通讯作者: 段明星 E-mail: duanmx@mail.tsinghua.edu.cn

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引用本文:

刘冠兰李甜刘进元严泽民段明星. 原核表达的萝卜PHGPx和谷胱甘肽对NIH3T3细胞氧化损伤的联合保护作用[J]. 中国生物工程杂志, 2010, 30(09): 13-18.

LIU Guan-Lan, LI Tian, LIU Jin-Yuan, YAN Ze-Min, DUAN Meng-Xing. Protection Effects of Prokaryotic Expressed Radish Phospholipid Hydroperoxide Glutathione Peroxidase and Glutathione on Hydroperoxidemediated Injury in Mouse NIH3T3 Fibroblasts. China Biotechnology, 2010, 30(09): 13-18.

链接本文:

https://manu60.magtech.com.cn/biotech/CN/Q789 或 https://manu60.magtech.com.cn/biotech/CN/Y2010/V30/I09/13

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