特里布尔斯 3 布伦特 运动诱导的骨肌肉适应
Ran Hee Choi1, Abigail McConahay1, Mackenzie B Johnson1
1Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA.
bioRxiv : the preprint server for biology
|August 12, 2025
概括
骨肌中的Tribbles 3 (TRB3) 蛋白质阻碍了运动的好处. 过度表达TRB3会损害葡萄糖代谢和适应,而 TRB3的缺失会改善它,突出显示它在肌肉健康中的作用.
科学领域:
- 分子生物学分子生物学
- 身体生理学 身体生理学
- 代谢研究研究 代谢研究
背景情况:
- 特里布尔斯3 (TRB3) 是一种伪激酶,涉及破坏葡萄糖代谢和抑制肥胖和糖尿病中的Akt信号传递.
- 以前的发现表明,TRB3在小鼠骨肌中的过度表达会减少肌肉质量和功能,可能导致缩.
研究的目的:
- 研究TRB3在骨肌肉适应运动训练中的作用.
- 为了确定TRB3是否影响运动诱导的葡萄糖代谢和线粒体功能的改善.
主要方法:
- 肌肉特异性TRB3转基因 (TG) 和野生型 (WT) 的小鼠接受了6周的自愿轮子运行.
- 使用非自愿的跑步机炼来标准化训练强度.
- 进行了葡萄糖耐受性测试.
- 对葡萄糖吸收和线粒体生物发生的标志物进行基因表达分析.
- 还训练和分析了TRB3淘汰赛 (KO) 的小鼠.
主要成果:
- 与WT littermates相比,TG小鼠表现出较短的跑距离和降低的葡萄糖耐受性.
- 不管训练如何,TRB3过度表达抑制了对葡萄糖吸收和线粒体生物生成至关重要的基因.
- TRB3 KO小鼠表现出独立于训练的改善葡萄糖耐受性,但没有关键基因标记物的显著变化.
结论:
- 骨肌中的TRB3显著削弱了运动的适应性益处.
- TRB3对运动诱导的葡萄糖代谢改善和潜在的线粒体功能产生负面影响.
- 准TRB3可能提供一种提高骨肌肉对运动反应的策略.
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