乳酸酸通过向GluN2B子单元的细胞内氧化还原机制强化NMDA受体电流:对突触可塑性的影响
Hubert Fiumelli1, Gabriel Herrera-López1, Fouad Lemtiri-Chlieh1,2
1Division of Biomedical Sciences, King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.
The Journal of physiology
|March 11, 2026
概括
星球细胞衍生的乳酸盐通过增强NMDA受体活性来增强神经元功能. 这一过程涉及代谢转化和CaMKII与GluN2B的相互作用,将天体细胞能量与突触可塑性和记忆联系起来.
科学领域:
- 神经科学是一个神经科学.
- 细胞的新陈代谢
- 突触性可塑性 突触性可塑性
背景情况:
- 天体细胞衍生乳酸为神经元和信号提供燃料,影响突触可塑性和记忆力.
- 乳酸调节神经元刺激性和神经保护的分子机制尚不清楚.
研究的目的:
- 阐明乳酸盐增强NMDA受体 (NMDAR) 功能的分子机制.
- 调查代谢转化,信号传递和蛋白质相互作用在乳酸对NMDARs影响中的作用.
主要方法:
- 在培养的皮质神经元中进行补丁记录,以测量NMDAR电流.
- 在HEK细胞中进行实验,以评估CaMKII和GluN2B的必要性.
- 免疫沉和近距离结合试验用于研究蛋白质相互作用和局部化.
主要成果:
- 乳酸盐通过增加振幅和衰变时间来增强NMDAR电流,这取决于乳酸盐的进入和代谢转化为pyruvate和NADH.
- 乳酸的强化需要细胞内动力学和Ca2+/calmodulin依赖蛋白激酶II (CaMKII) 的活性.
- 在GluN2B亚单元中,对氧化素敏感的氨酸残留是至关重要的;乳酸盐促进CaMKII-GluN2B结合和GluN2B在树突脊柱中的积累.
结论:
- 乳酸盐通过代谢转化和涉及CaMKII和GluN2B亚单元的氧化还原敏感相互作用来增强NMDAR功能.
- 这一途径将星细胞能量代谢与突触调节联系起来,影响神经元活动,学习和记忆.
- 这些发现揭示了一种新的机制,即星细胞衍生乳酸如何在分子水平上影响大脑功能.
关键词:
GluN2B 的子单位.纳米多氨酸受体 (NMDAR) 是一种NMDA受体./卡尔莫杜林依赖的蛋白激酶II (CaMKII) 蛋白乳酸乳酸是一种乳酸.氧化还原状态 氧化还原状态信号信号是指一个信号.突触性可塑性 突触性可塑性更多相关视频
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