中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (9): 1450-1456.doi: 10.4103/1673-5374.165514

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

三七总皂苷对成年全脑缺血再灌注后嗅球未成熟神经元的影响

  

  • 收稿日期:2015-08-11 出版日期:2015-09-28 发布日期:2015-09-28
  • 基金资助:

     湖南省博士创新课题(CX2014B099),湖南省教育厅科研项目(11C1264,13C958)

Effects of total saponins of Panax notoginseng on immature neuroblasts in the adult olfactory bulb following global cerebral ischemia/reperfusion

Xu He1, 2, Feng-jun Deng3, Jin-wen Ge4, Xiao-xin Yan1, Ai-hua Pan1, Zhi-yuan Li1   

  1. 1 Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, Hunan Province, China
    2 Department of Anatomy, Yiyang Medical College, Yiyang, Hunan Province, China
    3 Department of Pharmacy, Yiyang Medical College, Yiyang, Hunan Province, China
    4 Department of Integrated Traditional and Western Medicine, Hunan University of Traditional Chinese Medicine, Changsha, Hunan Province, China
  • Received:2015-08-11 Online:2015-09-28 Published:2015-09-28
  • Contact: Ai-hua Pan, Ph.D. or Zhi-yuan Li, Ph.D., panaihua@csu.edu.cn or li_zhiyuan@gibh.ac.cn.
  • Supported by:

    This study was supported by the Hunan Provincial Innovation Foundation for Postgraduate in China, No. CX2014B099 (to XH); the Science Foundation of Hunan Provincial Education Department of China, No. 11C1264 (to FJD), 13C958(to XH)

摘要:

摘要:三七总皂苷是中药三七的主要活性成分,可抑制血小板聚集和增加脑血流量,改善脑缺血大鼠行为能力及减小梗死体积,促进海马和侧脑室神经干细胞增殖和分化,但是否影响脑缺血再灌注后嗅球未成熟神经元尚不清楚。为此,实验以四血管闭塞方法建立全脑缺血再灌注模型大鼠,损伤30min后腹腔注射三七总皂苷(75mg/kg),1次/d。连续注射7,14d后,嗅球中神经前体细胞标志物DCX阳性表达增加,且嗅球中DCX/NeuN及磷酸化环磷腺苷效应元件结合蛋白/DCX双标阳性神经祖细胞数量增加。表明三七总皂苷能促进全脑缺血再灌注后嗅球未成熟神经元向DCX阳性细胞分化,其作用途径与环磷腺苷效应元件结合蛋白信号通路的激活有关。

关键词: 神经再生, 三七总皂苷, 脑缺血再灌注, 未成熟神经元, 神经再生, DCX, 嗅球

Abstract:

The main active components extracted from Panax notoginseng are total saponins. They have been shown to inhibit platelet aggregation, increase cerebral blood flow, improve neurological behavior, decrease infarct volume and promote proliferation and differentiation of neural stem cells in the hippocampus and lateral ventricles. However, there is a lack of studies on whether total saponins of Panax notoginseng have potential benefits on immature neuroblasts in the olfactory bulb following ischemia and reperfusion. This study established a rat model of global cerebral ischemia and reperfusion using four-vessel occlusion. Rats were administered total saponins of Panax notoginseng at 75 mg/kg intraperitoneally 30 minutes after ischemia then once a day, for either 7 or 14 days. Total saponins of Panax notoginseng enhanced the number of doublecortin (DCX)+ neural progenitor cells and increased co-localization of DCX with neuronal nuclei and phosphorylated cAMP response element-binding/DCX+ neural progenitor cells in the olfactory bulb at 7 and 14 days post ischemia. These findings indicate that following global brain ischemia/reperfusion, total saponins of Panax notoginseng promote differentiation of DCX+ cells expressing immature neuroblasts in the olfactory bulb and the underlying mechanism is related to the activation of the signaling pathway of cyclic adenosine monophosphate response element binding protein.