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A High-content Assay for Monitoring AMPA Receptor Trafficking
Published on: January 28, 2019
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该AAA+ ATPase 多拉酶调节AMPA受体依赖的突触可塑性和行为
Jianmin Zhang1, Yue Wang, Zhikai Chi
1Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Cell
|April 19, 2011
概括
AAA+ ATPase 索拉酶通过调节它们的内部化来调节表面AMPA受体 (AMPAR). 删除Thorase会损害AMPAR的去除,影响突触可塑性,导致学习和记忆缺陷.
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
- 生物化学 生物化学
背景情况:
- 突触可塑性,包括长期强化 (LTP) 和长期抑郁 (LTD),对于学习和记忆至关重要.
- AMPA受体 (AMPAR) 的表面表达是突触活动和可塑性的关键调节者.
研究的目的:
- 识别和描述AMPAR表面表达的新型分子调节剂.
- 阐明AAA+ ATPase Thorase在突触可塑性和认知功能中的作用.
主要方法:
- 神经元细胞中的多拉酶功能的表征.
- 在小鼠中Thorase的遗传删除 (Thorase null).
- 微型刺激后突触电流 (mEPSC) 的电生理学记录.
- 在Thorase null小鼠中对LTP和LTD的评估.
- 针对学习和记忆缺陷的行为测试.
主要成果:
- 索拉酶,一个AAA+ ATPase,被确定为表面AMPAR表达的调节者.
- 多拉酶通过ATPase依赖的AMPAR-GRIP1复合物的分解来调解AMPAR内部化.
- 对Thorase的遗传删除显著降低了AMPAR内部化.
- 托拉斯无基因小鼠表现出增加的mEPSC振幅,增强的LTP和废除的LTD.
- 托拉斯无酶小鼠在学习和记忆方面表现出显著的缺陷.
结论:
- 多拉酶在通过受体内化调节AMPAR表面表达方面发挥着关键作用.
- 托拉酶功能的破坏导致异常的突触可塑性和学习和记忆障碍.
- 多拉酶代表了一种新的分子标,用于理解和潜在地治疗认知障碍.
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