机械拉伸改善了高葡萄糖诱导的瘦素抵抗,从而促进了C2C12核细胞的葡萄糖吸收
Shaoting Fu1, Jin Peng2, Xiaohui Wang2
1Department of Kinesiology, College of Physical Education, Shanghai Normal University, Shanghai, China.
Peptides
|June 29, 2025
概括
机械拉伸,模仿运动,改善了C2C12核细胞中高葡萄糖诱导的瘦素抵抗 (LR). 这种炼通过调节关键信号通路来模仿增强葡萄糖吸收,提供了对骨肌肉LR的洞察力.
科学领域:
- 运动生理学 运动生理学
- 分子生物学分子生物学
- 细胞代谢的细胞代谢.
背景情况:
- 瘦素耐药性 (LR) 损害了中央和外周代谢调节.
- 众所周知,运动可以改善中央LR,但其对骨肌肉LR及其潜在机制的影响尚不清楚.
- 了解骨肌的LR机制对于代谢健康至关重要.
研究的目的:
- 为了研究机械拉伸的作用,一个体外运动模仿,在高葡萄糖诱导的LR在C2C12神经细胞.
- 阐明机械拉伸影响骨肌细胞中瘦素信号传递和葡萄糖吸收的分子机制.
主要方法:
- 在高葡萄糖条件下 (65mM),C2C12神经细胞接受了15%的机械拉伸,持续3或6小时.
- 评估了瘦素敏感性,葡萄糖吸收以及关键信号分子 (STAT3,PTP1B,SOCS3,IGF-1,IGF-1R,IRS-1,PI3K,Akt,GLUT4) 的表达/活性.
主要成果:
- 机械拉伸显著改善了高葡萄糖诱导的LR,降低了瘦素水平,增加了瘦素受体 (LepR) 和葡萄糖吸收.
- 通过增加信号转换器和转录3的激活器 (STAT3) 和降低蛋白质氨酸酸酶1B (PTP1B) 和细胞因子信号传递-3的抑制剂 (SOCS3) 来延伸调节LR调节器.
- 伸展激活了IGF-1/IGF-1R-PI3K/Akt-GLUT4通路,增强了葡萄糖代谢和吸收,经过6小时的伸展后观察到更大的效果.
结论:
- 机械拉伸有效缓解高葡萄糖诱导的LR在C2C12神经细胞.
- 该机制涉及调节STAT3,PTP1B和SOCS3,并增强IGF-1/IGF-1R-PI3K/Akt-GLUT4信号通路.
- 这些发现加深了对运动如何改善骨肌肉LR和葡萄糖吸收的理解.
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