基础医学与临床 ›› 2014, Vol. 34 ›› Issue (2): 151-154.

• 研究论文 • 上一篇    下一篇

DNA甲基转移酶1、3A和3B在低氧预适应小鼠大脑表达的变化

周成江1,张姝1,姜树原1,黄丽华1,吕国蔚2,张颜波3,吉训明4,邵国1   

  1. 1. 包头医学院
    2. 首都医科大学低氧医学研究所
    3. 泰山医学院附属医院
    4. 首都医科大学 宣武医院
  • 收稿日期:2013-04-02 修回日期:2013-07-25 出版日期:2014-02-05 发布日期:2014-01-13
  • 通讯作者: 邵国 E-mail:shao_guo_china@163.com

The expression of DNA methyltransferases 1, 3A and 3B in the brain of hypoxic preconditioned mice

  1. 1.
    2. Institute for Hypoxia Medicine, Capital Medical University
    3. the Affiliated Hospital of Tai Shan Medical College
    4. Xuan Wu Hospital, Capital Medical University
  • Received:2013-04-02 Revised:2013-07-25 Online:2014-02-05 Published:2014-01-13
  • Contact: guo shao E-mail:shao_guo_china@163.com

摘要: 目的 研究DNA甲基转移酶(DNMT)1、3A和3B在低氧预适应小鼠大脑中的变化,探讨低氧预适应形成过程中DNMTs的变化与脑保护作用的关系。方法 小鼠随机分成常氧组(H0)、低氧1次组(H1)或4次(H4)后取大脑皮质组织,应用实时定量PCR 技术、免疫印迹技术和DNA甲基转移酶活性检测DNMT1、DNMT3A和DNMT3B mRNA和蛋白质及DNMT活性。结果H1组和H4组DNMT3A和DNMT3B的mRNA和蛋白质水平较H0组显著降低(p<0.05),H4组DNMT活性较H0组降低(p<0.05)。结论DNMT3A和3B水平及DNMT活力的变化可能与低氧预适应小鼠获得脑保护的关系密切。

关键词: 低氧预适应, 大脑, DNA甲基转移酶, 小鼠

Abstract: Objective To study the changes of DNA methyltransferases (DNMT) in acute repeated hypoxic mice brain. Methods Mice were randomly divided into control group (H0), hypoxia group (H1) and hypoxia for 4 runs group (H4). Real-time PCR, Western blot and methyltransferase activity assay were adopted to detect the changes of three kinds of DNMTs. Results mRNA and protein levels of DNMT3A and DNMT3B were found to be decreased in H1 and H4 (p<0.05,vs H0). The activity of DNA methyltransferase was decreased in H4(p<0.05,vs H0 and H1). Conclusion The changes of DNA methyltransferase may be closely related to protection of the brain in hypoxic preconditioned mice.

Key words: Hypoxic preconditioning, brain, DNA methyltransferase, mouse