中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (11): 1145-1153.doi: 10.4103/1673-5374.135317

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

低氧诱导因子1病毒载体可抑制海马神经元的凋亡

  

  • 收稿日期:2014-04-26 出版日期:2014-06-12 发布日期:2014-06-12

A viral vector expressing hypoxia-inducible factor 1 alpha inhibits hippocampal neuronal apoptosis

Xiqing Chai 1, Weina Kong 1, Lingyun Liu 2, Wenguo Yu 1, Zhenqing Zhang 3, Yimin Sun 1   

  1. 1 Bioreactor and Protein Drug Research and Development Center of Hebei Universities, Hebei Chemical and Pharmaceutical College, Shijiazhuang, Hebei Province, China
    2 Department of Neurology, Shanghai Yangpu District Central Hospital, Shanghai, China
    3 Department of Neurology, the First Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
  • Received:2014-04-26 Online:2014-06-12 Published:2014-06-12
  • Contact: Yimin Sun, Bioreactor and Protein Drug Research and Development Center of Hebei Universities, Hebei Chemical and Pharmaceutical College, Shijiazhuang 050026, Hebei Province, China, sym0158@163.com.

摘要:

最近的研究表明,低氧诱导因子1可以减少氧化应激或缺氧诱导的大脑皮质神经元的凋亡,减轻淀粉样β蛋白的神经毒性。为此,实验构建了表达低氧诱导因子1α的重组腺病毒载体,假设其可抑制淀粉样β蛋白诱导的海马神经元凋亡。发现表达低氧诱导因子1α的重组腺病毒载体显著降低了Aβ25-35诱导的原代培养的海马神经元的凋亡。直接给予大鼠侧脑室注射表达低氧诱导因子1α的重组腺病毒载体,也可增强大鼠海马组织中低氧诱导因子1α的表达,降低Aβ25-35诱导的神经元凋亡数量。由此证实,低氧诱导因子1病毒载体具有减轻淀粉样β蛋白诱导的海马神经元凋亡的作用,为未来基因治疗神经退行性病提供了实验依据。

Abstract:

Hypoxia-inducible factor 1 (HIF-1) attenuates amyloid-beta protein neurotoxicity and decreases apoptosis induced by oxidative stress or hypoxia in cortical neurons. In this study, we constructed a recombinant adeno-associated virus (rAAV) vector expressing the human HIF-1α gene (rAAV-HIF-1α), and tested the assumption that rAAV-HIF-1α represses hippocampal neuronal apoptosis induced by amyloid-beta protein. Our results confirmed that rAAV-HIF-1α significantly reduces apoptosis induced by amyloid-beta protein in primary cultured hippocampal neurons. Direct intracerebral rAAV-HIF-1α administration also induced robust and prolonged HIF-1α production in rat hippocampus. Single rAAV-HIF-1α administration resulted in decreased apoptosis of hippocampal neurons in an Alzheimer’s disease rat model established by intracerebroventricular injection of aggregated amyloid-beta protein (25–35). Our in vitro and in vivo findings demonstrate that HIF-1 has potential for attenuating hippocampal neuronal apoptosis induced by amyloid-beta protein, and provides experimental support for treatment of neurodegenerative diseases using gene therapy.

Key words: nerve regeneration, Alzheimer’s disease, adeno-associated virus, hypoxia-inducible factor 1α, apoptosis, gene therapy, calcium concentration, transduction, intracerebroventricular injection, NSFC grant, neural regeneration