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在C2C12核细胞的生长中,线粒体的谷氨酸-氧酸转胺酶 (GOT2) 在C2C12核细胞的生长中

Ritu Som¹, Brian D Fink¹, Adam J Rauckhorst²

¹Department of Internal Medicine/Endocrinology and Metabolism, University of Iowa and the Iowa City Veterans Affairs Medical Center, 200 Hawkins Drive, Iowa City, IA, 52242, USA.

Journal of bioenergetics and biomembranes

|February 15, 2025

概括

谷氨基酸转胺酶2 (GOT2) 通过调节谷氨酸代谢,对C2C12细胞核的生长至关重要. 缺少它会损害细胞增殖,影响阿斯巴酸盐生成和代谢途径.

科学领域:

细胞生物学细胞生物学
生物化学生物化学
代谢研究研究代谢研究

背景情况:

谷氨酸对于细胞生长至关重要,作为一种关键的代谢基质.
线粒体酶如谷氨酸-氧酸转胺酶2 (GOT2) 和谷氨酸脱酶 (GDH) 处理谷氨酸衍生的谷氨酸.
GOT2从氧化和谷氨酸中催化了α-甲酸盐 (α-KG) 和酸盐的形成.

研究的目的:

研究GOT2在调解谷氨酸代谢和未分化C2C12细胞中的细胞生长中的作用.
了解GOT2缺乏对代谢途径和代谢物水平的影响.

主要方法:

在C2C12细胞中通过CRISPR介导的GOT2淘汰 (KO).
用不同度的谷氨胺测试细胞生长.
线粒体呼吸的测量.
使用谷氨的代谢物概况和13C追踪.
对GOT1和GDH的基因表达分析.

主要成果:

GOT2 KO显著损害了C2C12细胞生长,部分由增加的谷氨胺挽救.
在GOT2KO细胞中,阿斯巴酸盐水平下降了50%左右,而α-KG水平增加了.
在GOT2KO细胞中,酸途径代谢物和α-KG的减少性碳化酶的证据增加了.
线粒体呼吸和GDH/GOT1表达在WT和KO细胞之间没有显著差异.

结论:

GOT2对于谷氨酸的流量至关重要,并产生C2C12髓细胞增殖的必需代谢物.
减少阿斯巴酸盐和其他代谢物,而不是改变呼吸,可能导致GOT2缺乏细胞的生长受损.
代谢重编程涉及TCA循环,酸途径和氨基酸代谢发生在GOT2损失时.

关键词:

谷氨酸酸盐的使用方法谷氨酸脱酶的作用是什么谷氨酸氧化酸转氨酶是什么线粒体中的线粒体.肌囊细胞 (Myoblasts) 是一个细胞.骨架肌肉是一个骨肌肉.

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