项目名称: 糖原合酶激酶3在阿尔茨海默病突触病变中的作用及机制
项目编号: No.30800342
项目类型: 青年科学基金项目
立项/批准年度: 2009
项目学科: 金属学与金属工艺
项目作者: 朱铃强
作者单位: 华中科技大学
项目金额: 20万元
中文摘要: 神经元突触损伤是阿尔茨海默病(AD)的早期病理改变,其机制不明。糖原 合酶激酶 3(GSK-3)在 AD 中的作用已引起研究者的广泛关注,但 GSK-3在 AD 样突触病变 中的作用尚无报道。我们发现激活 GSK-3 导致突触结构破坏,并抑制长时程增强。本项目 拟采用电生理和电镜技术结合体视学定量分析突触密度,在整体、脑片和细胞水平进一步 确定激活 GSK-3在 AD 样突触病变形成中的作用;并综合运用分子荧光成像、蛋白纯化、放 射性自显影、基因转染等技术深入研究 GSK-3引起 AD 样突触病变的机制;最后,通过慢病 毒感染 SiRNA 技术,在已报道有 AD 样突触病变的转基因鼠观察抑制 GSK-3 活性对突触的保 护作用。由于突触是学习记忆的重要结构基础,该研究将为 AD 患者突触病变的发生机制提 供理论依据,并为其学习记忆障碍的早期防治提供有效的分子靶点。
中文关键词: 糖原合酶激酶 3;阿尔茨海默病;突触病变;Tg2576
英文摘要: The synaptic impariment is the charaterized pathological change in early stage of Alzheimer's disease. However, the mechanism is still unknown. The role of glycogen synthase kinase -3 in AD was attracted many investigators, but no reports about its role in synaptic pathology in AD. We found that activation of GSK-3 induced impairment of synaptic structure and inhibited LTP. This project is to make sure about the role of GSK-3 in AD-like synaptic pathological change by electrophyisiological and elctron microscopy and stereology analysis. We will further explore the mechanism of GSK-3 to AD like synaptic pathological change by molecular fluorescence, protein purificaiton, autoradiography, gene transfection. Finally, we will investigate effect of inhibition GSK-3 to the AD-like synaptic pathological changes in transgenic mice by lentivirus infection. Since the synapse is the important structure foundation of learn and memory, our investigation will support the mechanisms of AD synaptic pathological changes and provide the effective molecular target for AD prevention.
英文关键词: Glycogen synthase kinase 3;synaptic changes; Alzheimer's disease