对高脂肪饮食诱导的肌肉衰减有氧运动中介减弱的转录学见解
Weihao Hong1,2, Jianrong Zheng3, Yisheng Luan2
1School of Physical Education, Quanzhou Normal University, Quanzhou, China.
Frontiers in physiology
|March 16, 2026
概括
中等强度持续训练 (MICT) 能对抗高脂肪饮食 (HFD) 引起的肌肉衰竭. 运动将基因表达从脂肪积累和缩转移到改善胰岛素敏感性和血管生长.
科学领域:
- 运动生理学 运动生理学
- 分子生物学分子生物学
- 代谢健康 代谢健康
背景情况:
- 高脂肪饮食 (HFD) 导致肥胖,代谢功能障碍和骨肌肉消耗.
- 有氧运动可能会防止HFD诱导的肌肉损失,但机制尚不清楚.
研究的目的:
- 调查中等强度持续训练 (MICT) 对HFD诱导的肌肉衰竭的影响.
- 标志着小鼠胃角肌肌中的转录基因变化.
主要方法:
- 小鼠接受了21周的HFD养,随后接受了8周的MICT.
- 评估肌肉消耗标记 (指数,握力,纤维大小,脂质).
- 在胃角肌肌肉上进行RNA测序.
主要成果:
- HFD增加了体重,葡萄糖和肌肉消耗;MICT减轻了这些影响.
- HFD诱导了一个以脂质为重点的基因程序 (脂肪酸吸收,氧化).
- MICT抑制了缩基因 (Foxo1,Fbxo32,Trim63),对肌性基因的影响最小.
结论:
- 通过改变基因表达,MICT减轻了HFD引起的肌肉衰竭.
- 运动将肌肉从脂毒性,缩状态转变为对胰岛素敏感的,亲血管性特征.
- 在有限的直接激活肌肉建设途径的情况下,MICT的好处发生.
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