剧烈耐力运动对骨肌肉替代分离的影响
Alexander Ahn1, Jeongjin J Kim1, Aaron L Slusher1
1School of Kinesiology University of Michigan Ann Arbor Michigan USA.
FASEB bioAdvances
|August 1, 2025
概括
急性耐力运动会改变骨肌肉中的替代拼接 (AS) 和RNA结合蛋白 (RBP) 表达,特别是在运动后24小时. 长读数测序揭示了短读数测序遗漏的隐藏基因表达变化.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 运动生理学 运动生理学
背景情况:
- 替代拼接 (AS) 通过转录后mRNA修饰使蛋白质组多样化.
- 已知急性耐力运动会暂时影响骨肌肉中的AS,但全面的全转录组数据有限.
- 了解差异性AS (DAS) 和差异性异型表达 (DIE) 对于理解运动诱导的分子适应至关重要.
研究的目的:
- 通过短读 (SRS) 和长读RNA测序 (LRS) 来研究和比较急性耐力训练后骨肌中的差异性AS和DIE.
- 识别受运动影响的特定基因和RNA结合蛋白 (RBPs) 在异型水平.
- 突出SRS和LRS在表征骨肌肉转录组对运动反应中的互补作用.
主要方法:
- 从人类运动研究中分析公开可用的SRS数据.
- 在跑步机炼前后,牛津纳米孔LRS在小鼠胃半腹肌的性能.
- 使用rMATS (用于SRS) 和Swan (用于LRS) 的差异基因表达 (DGE),DIE和DAS分析,通过RT-PCR和免疫血栓进行验证.
主要成果:
- 在运动后的骨肌肉中,SRS和LRS都发现了显著的DGE,包括89次RBPs.
- 在SRS分析中,表跳转和内保留是常见的AS事件.
- 在LRS分析中,在几个基因中发现了没有DGE的显著DAS,包括13个运动相关基因 (例如mSirt2) 和61个RBP (例如mHnrnpa3,mHnrnpa1,mTia1),特别是在运动后24小时 (24pe).
结论:
- 急性耐力运动诱导骨肌中AS和RBP表达的变化,在运动后24小时观察到显著的效果.
- SRS对于DGE分析是有效的,但在检测异形水平变化方面存在局限性,可能缺少"隐藏"的DIE.
- LRS提供了对转录多样性的更全面的看法,并可以揭示潜在的炼适应和反应的新机制.
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