首都医科大学学报 ›› 2004, Vol. 25 ›› Issue (2): 170-173.

• 论著·基础研究 • 上一篇    下一篇

银杏叶提取物对缺氧复氧致神经细胞凋亡中Bax基因表达的影响

季凤清1, 孙海梅1, 郭燕茹2, 郭崇洁1, 赵天德2   

  1. 1. 首都医科大学组织胚胎学教研室;2. 中日友好临床医学研究所
  • 收稿日期:2003-10-21 修回日期:1900-01-01 出版日期:2004-04-15 发布日期:2004-04-15
  • 通讯作者: 季凤清

Effect of EGB on Expression of Bax Protein in Apoptosis of Neurons Following Hypoxia/Reoxygenation

Ji Fengqing1, Sun Haimei1, Guo Yanru2, Guo Chongjie1, Zhao Tiande2   

  1. 1. Department of Histology and Embryology, Capital University of Medical Sciences;2. China-Japan Friendship Institute of Clinical Medical Sciences
  • Received:2003-10-21 Revised:1900-01-01 Online:2004-04-15 Published:2004-04-15

摘要: 为探讨缺氧复氧致原代培养的大鼠大脑皮质神经细胞凋亡中,Bax基因的表达及银杏叶提取物(EGB)对其的调节作用,用胎龄16~17dWistar大鼠的大脑皮质神经细胞进行原代分离培养。采用原位末端标记法(TUNEL)透射电镜技术确立缺氧复氧神经细胞凋亡病理模型,并应用免疫组织化学方法显示缺氧复氧不同时间Bax基因的表达。结果:缺氧复氧可以使大鼠大脑皮质神经细胞发生凋亡,随缺氧时间的延长,凋亡细胞数逐渐增多,至缺氧8h,复氧18h达高峰,银杏叶提取物预保护可使凋亡细胞数减少;同时随着缺氧时间的延长,Bax基因表达逐渐增高,EGB可逆转缺氧复氧时Bax的表达。提示:EGB对缺氧复氧时Bax的表达具有明显的抑制作用,这可能是EGB对抗缺氧复氧时胎鼠大脑皮质神经细胞发生凋亡的机制之一。

关键词: 原代培养, 神经元, 凋亡, Bax, 银杏叶提取物

Abstract: The aim was to investigate the expression of Bax protein in the apoptosis of primary cultured rat cortical neurons following hypoxia/reoxygenation(H/R) and the protective role of extract gingo biloba (EGB). The cortical neurons of E16~17 d fetal rat was primarily cultured. The apoptosis model of primary cultured cortical neurons following H/R was established by using TUNEL staining and electromicroscopy. The expression of Bax protein was investigated with immunohistochemical method. H/R can cause apoptosis of primary cultured rat cortical neurons. The apoptosis cell increased with the time, reaching peak value at H 8R 18 ; EGB could decrease the percentage of apoptosis. The expression of Bax protein increased with hypoxia time, EGB could inverse the expression of Bax. Conclusion: EGB could significantly inhibit the expression of Bax. It may be one of the mechanisms of apoptosis.

Key words: primary culture, neurons, apoptosis, Bax, EGB

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