运动诱导的MyoD mRNA表达在年轻和年长的人类骨肌肉中:系统性审查和元分析
Andrew Nicholls1, M Brennan Harris2, Luthfia Dewi1,3
1Laboratory of Exercise Biochemistry, University of Taipei, Taipei, 11153, Taiwan.
Sports medicine (Auckland, N.Z.)
|May 3, 2025
概括
运动会增加骨肌肉中的MyoD mRNA表达,但在50岁以上的成年人中,这种反应会减弱. 老年人具有较高的休息MyoDmRNA水平,这表明肌肉衰老的补偿机制.
科学领域:
- 运动生理学 运动生理学
- 分子生物学分子生物学
- 骨肌肉生物学 骨肌肉生物学
背景情况:
- 肌细胞决定蛋白1 (MyoD) 是肌细胞发生和肌肉生长的关键调节者.
- 了解运动诱导的MyoD mRNA表达对于整个寿命的肌肉健康至关重要.
- 衰老与肌肉合成代谢信号和再生能力的变化有关.
研究的目的:
- 系统地审查和分析骨肌肉中急性运动诱导的MyoD mRNA表达.
- 为了比较年轻和老年人 (50岁以上) 的MyoD mRNA反应.
- 为了研究基底和运动刺激的MyoD mRNA水平的潜在与年龄相关的差异.
主要方法:
- 对符合条件的研究进行了全面的文献搜索.
- 分析包括50项研究,共822名参与者 (年轻人:20-35岁;老年人:53-85岁).
- 肌肉活检分析了运动后48小时内MyoD mRNA的变化.
主要成果:
- 运动显著增加了MyoD mRNA表达3-12小时后运动,回到基线24-48小时.
- 老年人表现出类似的时间模式,但与年轻人相比,MyoD mRNA反应较弱.
- 老年人的休息MyoDmRNA水平明显高于年轻人的水平.
结论:
- 运动诱导的MyoD mRNA增加在50岁以上的成年人中减弱.
- 在老年人中,基底MyoD mRNA的升高可能代表对衰老肌肉的代谢状态的补偿反应.
- 年龄和性别受到胰岛素和性激素等激素的影响,影响运动诱导的MyoD mRNA表达.
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