抵抗运动和机械超负荷对骨肌肉重塑的维门丁进行上调
Joshua S Godwin1, J Max Michel1, Cleiton A Libardi2
1Nutrabolt Applied and Molecular Physiology Laboratory, School of Kinesiology, Auburn University, Auburn, Alabama, United States.
American journal of physiology. Cell physiology
|April 3, 2025
概括
机械过载 (MOV) 在细胞外基质 (ECM) 中增加骨肌肉维门丁 (VIM). 卫星细胞可能调节VIM,在MOV期间中断VIM导致过度肌肉再生.
科学领域:
- 肌肉生理学和机械生物学
- 蛋白质组学和分子生物学
背景情况:
- 骨肌肉适应机械过载 (MOV) 需要复杂的分子反应.
- 了解新的目标和调节机制对于肌肉健康和性能至关重要.
研究的目的:
- 研究机械过载 (MOV) 对新型骨肌肉点的作用.
- 探索适应性反应中的干扰,特别是维丁 (VIM) 表达,如何影响骨肌肉适应.
- 在MOV之后,确定VIM在细胞外基质 (ECM) 中丰富的细胞起源和功能后果.
主要方法:
- 在大学年龄的女性进行了10周的抵抗训练后,对sarcolemmal蛋白质的蛋白质组分析.
- 质谱测量用于识别上调调节的蛋白质,重点是维门 (VIM).
- 在实体研究中,小鼠使用植物性肌肉协同效应的除模型来诱导MOV,通过mRNA,蛋白质和免疫组织化学检查VIM表达.
- 使用Pax7-DTA小鼠 (卫星细胞枯竭) 和AAV9-VIM-shRNA进行实验,以研究VIM调节和功能影响.
主要成果:
- 抵抗训练增加了sarcolemmal相关蛋白质含量,约10%的已识别的蛋白质被上调,包括维丁 (VIM).
- 在MOV之后,VIM mRNA和蛋白质水平在小鼠的植物肌中显著升高,主要局限于ECM.
- 卫星细胞枯竭减少了ECM VIM,而VIM通过shRNA被淘汰并没有改变肌肉质量增加,但导致更小,更集中的核纤维,表明再生表型发生了变化.
结论:
- 骨肌肉维门 (VIM) 在机械过载 (MOV) 后在细胞外基质 (ECM) 中得到丰富.
- 卫星细胞似乎在MOV期间在ECM中调节VIM表达的过程中发挥作用.
- 在MOV期间VIM的失调会导致过度的再生反应,这表明VIM在组织重塑和适应中的作用.
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