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STIM2调节NMDA受体内细胞分裂,这是由皮层神经元中的短期NMDA受体过度激活引起的

Karolina Serwach¹, Ewa Nurowska², Marta Klukowska¹

¹Molecular Biology Unit, Mossakowski Medical Research Institute, Polish Academy of Sciences, Warsaw, Poland.

Cellular and molecular life sciences : CMLS

|November 21, 2023

概括

流体相互作用分子 (STIM) 蛋白质,特别是STIM2,调节N-甲基-D-酸盐受体 (NMDAR) 的贩运. 在神经退行性疾病中,STIM2促进NMDAR内细胞分裂,可能保护神经元免受过量的流入.

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
细胞生物学细胞生物学

背景情况:

结构相互作用分子 (STIM) 蛋白质的失调和N-甲基-D-酸盐受体 (NMDARs) 的长时间激活与神经退行性疾病有关.
之前的研究表明,STIM沉默通过NMDAR增加了Ca2+的流入,并在神经元中确定了STIM-NMDAR2复合体.
在NMDAR子单元和STIM蛋白之间的细胞内贩运相互作用仍然在很大程度上是未知的.

研究的目的:

研究控制STIM1/STIM2和NMDAR子单元 (GluN1,GluN2A,GluN2B) 之间的相互作用和细胞内贩运的分子机制.
阐明STIM蛋白在调节NMDAR突触定位和功能的作用.

主要方法:

主要皮层神经元被用来研究蛋白质相互作用和贩运.
激活了NMDAR内细胞酶,以观察STIM-NMDAR相互作用的变化.
进行了STIM2沉默,以评估其对NMDAR电流和膜转位的影响.

主要成果:

激活NMDAR内细胞分裂会增加STIM2-GluN2A和STIM2-GluN2B的相互作用.
观察到STIM1蛋白从突触部迁移到突触部.
在激活后,STIM2沉默抑制了NMDAR从血和突触的转移,导致NMDAR电流增加.

结论:

在调节NMDAR突触贩运方面,STIM2发挥着至关重要的作用,通过在受体过度激活后促进NMDAR内细胞分裂.
这种机制可以作为通过NMDARs过度,不受控制的Ca2+流入的保护途径,为神经退行性疾病提供潜在的治疗见解.

关键词:

是一种细胞表面细胞表面细胞内存症是指细胞内存症.这就是GluN2B.内部化内部化内部化隐形病毒隐形病毒隐形病毒它们是NMDA受体.这是NMDAR过度激活.神经元激活的过程接收器贩运接收器贩运它们是STIM蛋白质.突触体中的突触体.全细胞补丁紧.

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