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时间效率高的高强度间歇训练改善了心脏功能,在心肌梗塞后的小鼠中有转录学证据
Bing Bo1, Chu Li1, Aijing Guo1
1Department of Kinesiology, School of Physical Education and Sport, Henan University, Kaifeng, China.
Frontiers in cell and developmental biology
|January 28, 2026
概括
高强度间歇训练 (HIIT) 在小鼠心肌梗塞 (MI) 后改善心脏功能和运动能力. HIIT可以减少纤维化,并促进有益的基因表达变化,支持心脏修复.
科学领域:
- 心血管生理学心血管生理学
- 运动科学 运动科学
- 分子心脏病学分子心脏病学
背景情况:
- 众所周知,高强度间歇训练 (HIIT) 可以提高心血管性能.
- 通过HIIT影响心脏心肌梗塞 (MI) 后心脏重塑的潜在机制尚未完全理解.
研究的目的:
- 在MI的小鼠模型中研究HIIT对左心室 (LV) 重塑和心脏功能的影响.
- 探索心脏中的分子适应在后MI小鼠的HIIT后.
主要方法:
- 成年小鼠接受了永久冠状动脉绑定 (MI) 或假手术.
- 鼠标被随机分为以下几组:对照组,只有HIIT的小组,虚假小组,只有MI的小组和MI+HIIT小组.
- 高强度训练 (HIIT) 计划包括15次跑步机比赛 (60秒高强度,30秒休息) 每周3次,持续6周.
- 心声学评估了LV功能和尺寸;纤维化通过组织学量化;使用EDU整合测量了DNA合成;基因表达被批量RNA测序分析.
主要成果:
- 与 MI + HIIT 组相比,MI + HIIT 组表现出明显改善的跑步能力,LV喷射率和分数缩短,与 MI 组相比.
- 在MI后的小鼠中,HIIT导致心肌纤维化和LV扩张的减少,这表明了生理重塑.
- 在HIIT组和MI + HIIT组的心脏中观察到DNA合成的增加.
- RNA测序揭示了MI + HIIT组中收缩/代谢途径的协调上调和亡/炎症信号的下调.
结论:
- 在小鼠中,HIIT有效地提高了MI后的运动能力和心脏功能.
- HIIT减轻了不良的心脏重塑,包括纤维化和扩张,后MI.
- HIIT将心脏基因表达重编程到促收缩,抗炎和细胞循环允许状态,促进心脏恢复.
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