中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (13): 1297-1302.doi: 10.4103/1673-5374.137577

• 原著:退行性病与再生 • 上一篇    下一篇

Notch-1信号通路在β淀粉样肽(25-35)诱导PC12细胞凋亡中的角色

  

  • 收稿日期:2014-05-19 出版日期:2014-07-11 发布日期:2014-07-11

Role of Notch-1 signaling pathway in PC12 cell apoptosis induced by amyloid beta-peptide (25–35)

Huimin Liang 1, 2, Yaozhou Zhang 3, Xiaoyan Shi 4, Tianxiang Wei 1, Jiyu Lou 1   

  1. 1 Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
    2 Huaihe Hospital of Henan University, Kaifeng, Henan Province, China
    3 Department of Biotechnology, Xinyang Agricultural College, Xinyang, Henan Province, China
    4 Pharmaceutical College of Henan University, Zhengzhou, Henan Province, China
  • Received:2014-05-19 Online:2014-07-11 Published:2014-07-11
  • Contact: Jiyu Lou, Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, Henan Province, China, zzuljy12856@126.com. Huimin Liang, M.D., Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, Henan Province, China; Huaihe Hospital of Henan University, Kaifeng 475000, Henan Province, China, luciasyl@163.com.

摘要:

研究发现在阿尔茨海默病患者大脑海马组织中Notch-1的表达增加,因而我们推测其可能参与β淀粉样肽(25-35)诱导PC12细胞凋亡的过程,实验设计了以0,0.1,1.0,10和100 nmol/L Notch-1信号通路抑制剂DAPT孵育PC12细胞30min后,以β淀粉样肽(25-35)诱导细胞48h的实验方案。结果显示较高浓度(>10nmol/L)DAPT预处理能增加β淀粉样肽(25-35)诱导后PC12细胞的存活率,降低凋亡相关蛋白caspase-3,8,9的表达,增加氧化应激相关酶超氧化物歧化酶和过氧化氢酶活性增加,抑制活性氧的生成,减少核因子κB的表达。证实Notch-1信号通路确实在β淀粉样肽(25-35)诱导PC12细胞凋亡中起着重要的作用。

关键词: 神经再生, 阿尔茨海默病, β淀粉样肽(25-35), Notch-1, PC12细胞, 细胞凋亡, 氧化应激, NF-κB

Abstract:

Recent studies have demonstrated that Notch-1 expression is increased in the hippocampus of Alzheimer’s disease patients. We speculate that Notch-1 signaling may be involved in PC12 cell apoptosis induced by amyloid beta-peptide (25–35) (Aβ25–35). In the present study, PC12 cells were cultured with different doses (0, 0.1, 1.0, 10 and 100 nmol/L) of N-[N-(3,5-Difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester, a Notch-1 signaling pathway inhibitor, for 30 minutes. Then cultured cells were induced with Aβ25–35 for 48 hours. Pretreatment of PC12 cells with high doses of N-[N-(3,5-Difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester (> 10 nmol/L) prolonged the survival of PC12 cells after Aβ25–35 induction, decreased the expression of apoptosis-related proteins caspase-3, -8, -9, increased the activity of oxidative stress-related superoxide dismutase and catalase, inhibited the production of active oxygen, and reduced nuclear factor kappa B expression. This study indicates that the Notch-1 signaling pathway plays a pivotal role in Aβ25–35-induced PC12 apoptosis.

Key words: nerve regeneration, Alzheimer’s disease, amyloid beta-peptide (25–35), Notch-1, PC12 cells, apoptosis, oxidative stress, nuclear factor kappa B, neural regeneration