在阿尔茨海默氏症模型中,抑制性内部神经元缺陷将改变的网络活动和认知功能障碍联系在一起
Laure Verret1, Edward O Mann, Giao B Hang
1Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA.
Cell
|May 1, 2012
概括
在阿尔茨海默氏病模型中,降低 Nav1.1 水平会损害帕瓦胺细胞,导致网络功能障碍和记忆丧失. 恢复 Nav1.1 功能可以改善这些阿尔茨海默病缺陷.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 阿尔茨海默病 (AD) 的特点是认知能力下降和大脑网络活动的改变.
- 驱动AD中这些网络变化的基本机制在很大程度上是未知的.
- 人类粉样蛋白前体蛋白 (hAPP) 转基因小鼠作为研究AD相关病理学的模型.
研究的目的:
- 为了研究网络功能障碍和帕瓦胺 (PV) 细胞在阿尔茨海默氏病的发病过程中的作用.
- 检查电压道亚单元Nav1.1对AD.PV电池功能的贡献.
- 为了确定恢复Nav1.1水平是否可以在小鼠模型中缓解AD类症状.
主要方法:
- 在hAPP转基因小鼠中进行了脑电图 (EEG) 记录.
- 在hAPP小鼠和人类AD患者中测量了通道子单元Nav1.1的水平.
- 在hAPP小鼠中,使用Nav1.1-BAC恢复了Nav1.1表达,以评估功能恢复.
主要成果:
- hAPP小鼠表现出自发的形放电和减少的马振荡,表明网络超同步.
- 在hAPP小鼠和AD患者中观察到Nav1.1的水平降低,特别是在PV细胞中.
- 在hAPP小鼠中恢复Nav1.1使抑制性突触活动,马振荡正常化,并减少了超同步,记忆缺陷和死亡率.
结论:
- 降低的Nav1.1水平和随后的PV细胞功能障碍是AD中异常网络活动的关键贡献者.
- 在AD模型中,受损的光伏细胞功能和网络同步与记忆缺陷和死亡率相关.
- 针对 Nav1.1 可能为阿尔茨海默病提供治疗策略.
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