对于高葡萄糖诱导的胰岛素敏感性和骨肌细胞中线粒体功能的l-norleucine的影响
Bingqian Ding1, Yalei Fan1, Tingting Zhu2
1School of Clinical Medicine, Ningxia Medical University, Yinchuan, 750004, China.
Biochemical and biophysical research communications
|March 9, 2024
概括
通过降低氧化应激和促进骨肌细胞中的线粒体功能,L-诺勒氨酸增强胰岛素敏感性和改善胰岛素抵抗. 这种氨基酸异构体在高葡萄糖条件下支持细胞代谢.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 代谢研究研究 代谢研究
背景情况:
- 胰岛素抵抗是一种主要的代谢障碍.
- 众所周知,氨酸的同位素L-norleucine可以刺激胰岛素的合成代谢过程.
- 通过哪些特定机制影响l-norleucine的胰岛素敏感性和抵抗性仍然不清楚.
研究的目的:
- 为了研究l-norleucine对骨肌细胞胰岛素耐药性的影响.
- 在高血糖条件下阐明l-norleucine对细胞代谢和基因表达的影响的分子机制.
主要方法:
- 使用高葡萄糖诱导的骨肌细胞生成一种胰岛素抵抗模型.
- 在48小时内给药1.0mmol/L的l-norleucine.
- 评估线粒体ATP含量,活性氧物种 (ROS) 水平,葡萄糖吸收和关键线粒体基因 (TFAM,AMPK,PGC-1α) 的表达.
主要成果:
- L-norleucine显著增加了线粒体中的ATP含量.
- L-norleucine降低了反应性氧物种 (ROS) 的产生.
- 诺莱氨酸促进了线粒体生物发生基因 (TFAM,AMPK,PGC-1α) 的表达,并增加了葡萄糖的摄取.
结论:
- 在高葡萄糖条件下,L-norleucine增强胰岛素敏感性并改善骨肌细胞中的胰岛素抵抗性.
- 这些有益影响归因于线粒体氧化应激的改善和线粒体功能的改善.
- L-norleucine的作用与改善细胞代谢有关,而不是改变线粒体效率.
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