中国神经再生研究(英文版) ›› 2012, Vol. 7 ›› Issue (36): 2874-2881.

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

染料木素干预去卵巢大鼠海马神经元凋亡及凋亡相关蛋白Bcl-2和Bax的表达

  

  • 收稿日期:2012-04-28 修回日期:2012-08-01 出版日期:2012-12-25 发布日期:2012-12-25

Effects of genistein on neuronal apoptosis, and expression of Bcl-2 and Bax proteins in the hippocampus of ovariectomized rats

Yun Peng1, Bo Jiang1, Huiling Wu1, Ruchun Dai2, Liming Tan1   

  1. 1 Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province,China
    2 Institute of Endocrinology and Metabolism, the Second Xiangya Hospital, Central South University, Changsha 410011,Hunan Province,China
  • Received:2012-04-28 Revised:2012-08-01 Online:2012-12-25 Published:2012-12-25
  • Contact: Jiang, Ph.D., Associate professor, Master’s supervisor, Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province,China Jiangzao2002@yahoo.com.cn
  • About author:Yun Peng★, Studying for master’s degree, Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province,China

Abstract:

Genistein is one of several isoflavones that has a structure similar to 17β-estradiol, has a strong antioxidant effect, and a high affinity to estrogen receptors. At 15 weeks after ovariectomy, the expression of Bcl-2 in the hippocampus of rats decreased and Bax expression increased, with an obvious upregulation of apoptosis. However, intraperitoneal injection of genistein or 17β-estradiol for 15 consecutive weeks from the second day after operation upregulated Bcl-2 protein expression, downregulated Bax protein expression, and attenuated hippocampal neuron apoptosis. Our experimental findings indicate that long-term intervention with genistein can lead to a decrease in apoptosis in hippocampal neurons following ovariectomy, upregulate the expression of Bcl-2, and downregulate the expression of Bax. In addition, genistein and 17β-estradiol play equal anti-apoptotic and neuroprotective roles.

Key words: ovariectomized model, rats, hippocampus, apoptosis, Bcl-2, Bax, genistein, 17β-estradiol, brain injury, neural regeneration