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NaV1.1通过调节AKT和CDK2来促进人类介质干细胞的细胞循环

Mohammed Fouad Zakaria^1,2, Hiroki Kato¹, Soichiro Sonoda¹

¹Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, Fukuoka 812-8582, Japan.

Journal of cell science

|September 11, 2024

概括

电压通道α子单元1 (SCN1A) 及其蛋白NaV1.1调节人间介质干细胞 (MSC) 的增殖. 通过改变CDK2和AKT蛋白水平,SCN1A沉默会影响细胞周期的进展.

科学领域:

细胞生物学细胞生物学
分子生物学分子生物学
干细胞研究干细胞研究

背景情况:

不易激发的细胞表达电压通道α子单元1基因 (SCN1A) 和蛋白质 (NaV1.1).
在这些细胞中NaV1.1的特定功能,特别是在人类介质干细胞 (MSCs) 中,仍然在很大程度上未被描述.

研究的目的:

研究SCN1A和NaV1.1在人类MSCs生物功能中的作用.
阐明SCN1A影响MSC增殖和细胞周期进展的分子机制.

主要方法:

在MSC中沉默SCN1A基因.
对NaV1.1表达和定位的分析.
评估MSC增殖和细胞周期阶段分布.
西部涂抹测定CDK2和AKT的蛋白质水平,以及AKT酸化.
循环赫西米德追踪试验用于研究蛋白质降解.
蛋白质分解抑制测定用于研究降解途径.

主要成果:

SCN1A表达在MSC中,NaV1.1定位在内质网膜中,独立于Na+电流.
沉默SCN1A降低了MSC的增殖,并导致S阶段的细胞周期延迟.
沉默SCN1A降低了CDK2和AKT蛋白水平,而不改变它们的mRNA表达,并抑制了AKT酸化.
SCN1A沉默促进了CDK2蛋白降解,但不是AKT,通过非蛋白质和非自的途径.
无论是AKT抑制还是激活都没有影响CDK2降解或核定位.

结论:

NaV1.1在调节人类MSC细胞周期方面发挥着至关重要的作用.
在MSC中NaV1.1的功能涉及CDK2和AKT蛋白的翻译后调节.
SCN1A通过独立于离子通道活性和经典蛋白质降解途径的机制影响MSC的增殖.

关键词:

这就是SCN1A.在 AKT AKT 里面.在CDK2中使用CDK2.细胞循环的细胞周期介质细胞干细胞介质细胞干细胞在 NaV1.1 中使用.

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