Neuroprotection Mediated through GluN2C-Containing N-methyl-D-aspartate (NMDA) Receptors Following Ischemia.

Neuroprotection Mediated through GluN2C-Containing N-methyl-D-aspartate (NMDA) Receptors Following Ischemia.
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缺血后,通过含GluN2C的N-甲基-D-天冬氨酸(NMDA)受体介导的神经保护作用。

DOI:
10.1038/srep37033
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发表时间:
2016-11-15
期刊:
影响因子:
4.6
通讯作者:
Chen BS
Chen BS
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chung C;Marson JD;Zhang QG;Kim J;Wu WH;Brann DW;Chen BS

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NMDA 受体 (NMDAR) 的缺血后激活与介导促生存或促死亡活性的 NMDAR 亚基特异性信号传导有关。尽管已经进行了大量研究来表征缺血后 GluN2A 和 GluN2B 的作用,但对 GluN2C 的调节了解较少。在这里,我们发现急性海马切片中 GluN2C 表达因缺血而增加。引人注目的是,与野生型小鼠相比,GluN2C 基因敲除小鼠在全脑缺血后,海马 CA1 区神经元死亡更多,空间工作记忆减少。此外,我们发现表达 GluN2C 的海马神经元对 NMDA 诱导的毒性表现出明显的抵抗力,并减少了钙流入。使用缺血的体内和体外实验模型,我们证明了 GluN2C 的神经保护作用,表明了 GluN2C 上调以促进缺血后神经元存活的机制。这些结果可能为开发 NMDAR 亚基特异性治疗策略以保护神经元免受兴奋性毒性提供见解。
Post-ischemic activation of NMDA receptors (NMDARs) has been linked to NMDAR subunit-specific signaling that mediates pro-survival or pro-death activity. Although extensive studies have been performed to characterize the role of GluN2A and GluN2B following ischemia, there is less understanding regarding the regulation of GluN2C. Here, we show that GluN2C expression is increased in acute hippocampal slices in response to ischemia. Strikingly, GluN2C knockout mice, following global cerebral ischemia, exhibit greater neuronal death in the CA1 area of the hippocampus and reduced spatial working memory compared to wild-type mice. Moreover, we find that GluN2C-expressing hippocampal neurons show marked resistance to NMDA-induced toxicity and reduced calcium influx. Using both in vivo and in vitro experimental models of ischemia, we demonstrate a neuroprotective role of GluN2C, suggesting a mechanism by which GluN2C is upregulated to promote neuronal survival following ischemia. These results may provide insights into development of NMDAR subunit-specific therapeutic strategies to protect neurons from excitotoxicity.
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