耐力训练促进了染色质的关闭,及时抑制了运动后立即早期的应激反应
Laura M de Smalen1, Volkan Adak1, Aurel B Leuchtmann1
1Biozentrum, University of Basel, Basel, Switzerland.
Molecular metabolism
|July 7, 2025
概括
耐力运动会导致肌肉染色质可访问性的快速和持久变化,影响基因表达,并可能增强肌肉记忆力和弹性.
科学领域:
- 运动生理学 运动生理学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 耐力训练诱导骨肌肉适应以提高性能.
- 肌核中的转录程序调节这些适应.
- 虽然研究了DNA甲基化和基因素修饰,但运动后的染色质重组和可访问性变化仍然不清楚.
研究的目的:
- 研究耐力训练对骨肌肉中染色质可访问性和重塑性的影响.
- 要了解运动后这些表观遗传变化的时间动态.
- 为了确定参与运动诱导的染色体重塑和基因表达的调节因素.
主要方法:
- 多omics分析包括ATAC测序和RNA测序在训练和未训练的小鼠.
- 在运动后的0,6小时和72小时,在肌核中绘制染色质可访问性映射.
- 动机活动分析以确定关键的转录因子.
主要成果:
- 耐力训练导致运动后的染色质快速关闭,训练肌肉的可访问性损失更大.
- 这些染色质变化在训练的肌肉中持续时间更长 (长达72小时).
- 训练改变了直接早期转录因子 (例如,Fos,Jun) 和参与新陈代谢,胰岛素反应和血管生成的调节基因的激活动态.
结论:
- 耐力训练诱导肌肉中的快速和持久的染色质重塑,有助于运动诱导的转录反应.
- 训练建立了持久的表观遗传修饰,可能支持肌肉记忆和生理性.
- 这些发现提供了有关预防疾病的肌肉适应机制的见解.
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