中国畜牧兽医

• 生理生化 • 上一篇    下一篇

硫氧还蛋白对过氧化氢诱导的BRL-3A细胞损伤的保护作用

余文兰1,王朵朵2,郭剑英1,胡莲美1   

  1.  (1.华南农业大学兽医学院,广东广州  5106422.中国科学院华南植物园,广东广州  510642

  • 收稿日期:2013-12-03 出版日期:2014-06-20 发布日期:2014-07-24
  • 通讯作者: 胡莲美。E-mail:hulianmei@yahoo.com.cn;Tel:020-85280248
  • 作者简介:余文兰(1989—),女,江西人,硕士,研究方向:临床兽医学内科。 王朵朵(1989—),女,湖北人,硕士,研究方向:生物化学与分子生物学。 余文兰和王朵朵对本文具有同等贡献,并列为第一作者。
  • 基金资助:

    广东省科技计划项目(2011B020306009)。

Protective Effect of Thioredoxin on H2O2-induced Injury of BRL-3A Cells

  • Received:2013-12-03 Online:2014-06-20 Published:2014-07-24

摘要: 本试验利用不同浓度过氧化氢(H2O2)作用于BRL-3A大鼠肝细胞,用四甲基偶氮唑蓝(MTT)比色法检测BRL-3A细胞存活数量以确定H2O2最适损伤浓度。试验随机分为正常对照组、H2O2处理组和硫氧还蛋白(2.5和5 μmol/L) 预处理组,用脂质过氧化物丙二醛(MDA)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)试剂盒测定细胞的氧化应激变化。结果显示1000 μmol/L H2O2对BRL-3A细胞增殖具有显著的抑制作用(P<0.05);2.5 μmol/L 硫氧还蛋白对H2O2损伤的BRL-3A细胞具有保护作用,能显著抑制H2O2诱导的BRL-3A细胞损伤产生MDA(P<0.05),并显著增加细胞SOD及CAT的活性(P<0.05),从而保护肝细胞。本试验结果表明,硫氧还蛋白对H2O2诱导BRL-3A细胞的氧化应激损伤具有保护作用。

关键词:

硫氧还蛋白; 过氧化氢; 损伤; 保护

Abstract: BRL-3A cells were injured by different doses of hydrogen peroxide (H2O2) and the cell survival rate was assessed by methyl thiazolyl tetrazolium (MTT) assay to select the optimal concentration of H2O2. The BRL-3A cells were divided into normal control,H2O2-induced and thioredoxin (Trx) pre-treatment groups with different concentrations. The assay kits of malondialdehyde (MDA),superoxide dismutase (SOD) and catalase (CAT) were used to detect the alterations of oxidative stress.Cell proliferation of BRL-3A was inhibited significantly by 1000 μmol/L H2O2 (P<0.05). 2.5 μmol/L Trx had the protective effect on H2O2-induced injury of BRL-3A cells by significantly decreasing MDA contents which were induced by H2O2 and increasing the activities of SOD and CAT (P<0.05), thus protecting liver cells.Trx had protective effects on BRL-3A cells induced by H2O2.The mechanism might be related to its antioxidant activity.

Key words: thioredoxin; hydrogen peroxide; injury; protection