上海交通大学学报(医学版)

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N-硬脂酰酪氨酸对H2O2诱导PC12细胞氧化应激损伤的影响

姚莉韵,林 琦,陆 阳   

  1. 上海交通大学 医学院药学系, 上海 200025
  • 出版日期:2014-05-28 发布日期:2014-05-30
  • 通讯作者: 陆 阳, 电子信箱: luyangssmu@163.com。
  • 作者简介:姚莉韵(1966—), 女, 博士, 副教授; 电子信箱: yaoliyun517@163.com。
  • 基金资助:

    上海市科委自然科学基金(11ZR1419200);国家自然科学基金(81171245);上海市科委基础重点课题(11JC1406600)

Effects of N-stearoyltyrosine on H2O2-induced oxidative-stress damage of PC12 cells

YAO Li-yun, LIN Qi, LU Yang   

  1. Department of Pharmacy, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
  • Online:2014-05-28 Published:2014-05-30
  • Supported by:

    Natural Science Foundation of Shanghai Science and Technology Commission Municipality, 11ZR1419200; National Natural Science Foundation of China, 81171245; Key Basic Projects of Shanghai Science and Technology Commission Municipality, 11JC1406600

摘要:

目的 研究N-硬脂酰酪氨酸(NsTyr)预处理对过氧化氢(H2O2)诱导的PC12细胞氧化应激损伤的影响。方法 体外培养传代的PC12细胞分为空白对照组、H2O2损伤组(不同浓度H2O2诱导16 h)和NsTyr预处理组(不同浓度NsTy预处理30 min后加入100 μmol/L H2O2诱导16 h)。流式细胞仪检测细胞凋亡率及活性氧类(ROS)生成,Western blotting检测Bax和Bcl-2的表达。结果 与H2O2(100 μmol/L)损伤组比较,5、10 μmol/L NsTyr预处理组PC12细胞存活率显著升高(P<0.01),凋亡细胞率降低(P<0.05),细胞内ROS生成减少(P<0.05,P<0.01),Bcl-2/Bax比值升高(P<0.05)。结论 NsTyr能提高PC12细胞的抗氧化应激损伤能力,上调Bcl-2表达和下调Bax表达,抑制细胞凋亡。

关键词: 硬脂酰酪氨酸, 过氧化氢, PC12细胞, 氧化应激

Abstract:

Objective To investigate the effects of N-stearoyltyrosine (NsTyr) pretreatment on oxidative stress damage of PC12 cells induced by H2O2. Methods PC12 cells cultured in vitro were divided into the blank control group, H2O2 damage group (induced by H2O2 of different concentrations for 16 h), and NsTyr pretreatment group (induced by H2O2 of 100 μmol/L for 16 h after being pretreated by NsTy of different concentrations for 30 min). The apoptosis rate and ROS level were detected by the flow cytometer. The changes of expressions of Bax and Bcl-2 were determinated by the Western blotting. Results Compared to the H2O2 (100 μmol/L) damage group, the survival rates of PC12 cells of the NsTyr (5 and 10 μmol/L) pretreatment groups were significantly increased (P<0.01); the apoptotic rates of PC12 cells decreased (P<0.05); the intracellular production of ROS decreased (P<0.05, P<0.01); and the ratios of Bcl-2/Bax increased (P<0.05). Conclusion NsTyr can protect PC12 cells against H2O2-induced oxidative-stress damage; up-regulate the expression of Bcl-2; down-regulate the expression of Bax; and inhibit the apoptosis.

Key words: N-stearoyltyrosine, H2O2, PC12 cells, oxidative stress