携带GluN2B蛋白质截断变体的小鼠改变了NMDA受体子单元的组成,它们的行为重复了患者的表型
Klevinda Fili1,2, Viktor Kuchtiak1,3, Eni Tomovic1,3
1Institute of Physiology, Czech Academy of Sciences(CAS), Videnska 1083, Prague 4, 142 00, Czech Republic.
在GRIN2B中,蛋白质缩减变异会导致哈普隆缺陷,改变NMDA受体功能,并导致小鼠中度神经发育影响. 这项研究揭示了GRIN2B相关智力障碍背后的机制.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- GRIN2B中的致病变体与智力障碍 (ID) 和神经发育障碍有关.
- 在GRIN2B中,蛋白质截断变体 (PTV) 可能导致与错误变体相比,哈普隆不充分性和不那么严重的表型.
研究的目的:
- 用GluN2B PTV描述一个敲入鼠标模型 (Grin2b+/Δ),以了解它对NMDAR功能和行为的影响.
- 研究GRIN2B PTVs对NMDA受体子单元组成,突触功能和行为的功能后果.
主要方法:
- 蛋白质组分析以评估GluN2B蛋白水平和亚单元组成.
- 在海马神经元中的电生理学测量NMDA受体电流和突触功能.
- 在小鼠中进行行为测试,以评估运动活动,焦虑,感觉运动门,学习,记忆和社会行为.
主要成果:
- 显著减少的全长GluN2B蛋白质和没有可检测的截断形式,GluN2A略有增加.
- 减少了NMDA诱导的电流,降低了ifenprodil灵敏度和更快的EPSC失活,表明转向含有GluN2A的受体.
- 增加AMPAR-mEPSC振幅,低活性,增加男性的焦虑,以及受损的感觉运动门,而学习,记忆和社会行为基本上不受影响.
结论:
- 一个单基基的GRIN2B PTV改变了NMDAR子单元的组成和功能.
- 这种变化导致适度的行为影响,包括低活性和受损的感觉运动门.
- 这些发现提供了对GRIN2B关联ID背后的机制的见解.
更多相关视频
04:48A High-throughput Calcium-flux Assay to Study NMDA-receptors with Sensitivity to Glycine/D-serine and Glutamate
Published on: July 10, 2018
07:20A Simple Cell-based Immunofluorescence Assay to Detect Autoantibody Against the N-Methyl-D-Aspartate NMDA Receptor in Blood
Published on: January 9, 2018
相关概念视频
G-protein Coupled Receptors
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
Truncation in Survival Analysis
Left truncation occurs when individuals who experienced the event of interest before a certain time are not included in the study. This is often due to a "delayed entry" into the study where only those who survive until a certain entry point are...
Histone Variants at the Centromere
Receptor-mediated Endocytosis
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
