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神经活动诱导的GLUT3等离子转移支持对记忆获取的能量需求

Xin-Yue Wei¹, Ze-Ming Zou¹, Zhong-Xiao Yao¹

¹Department of Anatomy and Neurobiology, Shandong Key Laboratory of Mental Disorders and Intelligent Control, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P.R. China.

Communications biology

|November 29, 2025

概括

蛋白质激酶Cepsilon (PKCε) 调节葡萄糖转运体3 (GLUT3) 转移到神经元膜. 这一过程对于记忆的获取至关重要,因为它确保了足够的葡萄糖吸收和ATP生产.

科学领域:

神经科学是一个神经科学.
细胞生物学细胞生物学
生物化学生物化学

背景情况:

葡萄糖载体3 (GLUT3) 对于神经元的葡萄糖吸收至关重要,在神经活动期间迅速移动到血膜.
确切的分子机制和GLUT3转位的生理意义尚未完全理解,这限制了我们对葡萄糖代谢如何支持大脑功能的知识.

研究的目的:

阐明调节神经元激活反应中GLUT3转移到等离子膜的分子机制.
研究活动依赖GLUT3转位在认知过程中的功能性作用,特别是记忆获取.

主要方法:

在GLUT3 (Thr232和Ser246) 上确定了PKCε在神经元激活时向的特定酸化位.
开发了一种抑制剂,TAT-GLUT3(2D,以阻止GLUT3-KLC1结合并防止活动依赖的GLUT3转位.
评估了GLUT3转位阻断对小鼠葡萄糖吸收,ATP生产和记忆功能的影响.

主要成果:

PKCε在Thr232和Ser246酸化GLUT3,增强其与KLC1的相互作用,并促进血膜插入.
阻断GLUT3转位与TAT-GLUT3 ((2D) 减少神经元葡萄糖吸收和ATP水平.
在小鼠中,活动诱导的GLUT3转位障碍导致记忆获取的缺陷,但不是记忆巩固或检索.

结论:

通过PKCε介导的GLUT3酸化是神经元活动期间其在血内插入的关键调节者.
活动依赖的GLUT3转位对于支持记忆获取的能量需求至关重要.
这项研究促进了对葡萄糖代谢在记忆形成中的作用的理解.

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