补充β-基-β-甲基丁酸盐可以减轻因不活动和蛋白质缺乏引起的肌肉缩
Xu He1,2,3, Yan Li4,5,6, Jun Chen1,2
1Department of Geriatrics, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Xishan District, Kunming, 650032, Yunnan, China.
Biogerontology
|June 18, 2025
概括
贝塔-基-贝塔-甲基酸盐 (HMB) 有助于在不活动和蛋白质缺乏期间保持肌肉质量. 它通过激活AKT/mTOR通路,调节自和维持线粒体功能来起作用,这表明HMB是一种治疗策略.
科学领域:
- 肌肉生理学和分子生物学
- 营养生物化学 营养生物化学
- 细胞应激反应的细胞应激反应
背景情况:
- 肌肉缩是一个主要的健康问题,由不活动或营养不良引起.
- 在预防肌肉损失方面,β-基β-甲基酸盐 (HMB) 的精确机制尚未完全理解.
- 研究HMB在不同缩模型中的作用对于治疗开发至关重要.
研究的目的:
- 检查HMB在预防老鼠因不活动和蛋白质缺乏引起的肌肉缩方面的疗效.
- 阐明HMB发挥其保护作用的分子通路.
- 在体外评估HMB对肌肉形态,强度和细胞功能的影响.
主要方法:
- 大鼠接受了不活动或缺乏蛋白质的饮食,有或没有补充HMB.
- 分析肌肉样本以检测形态和生化变化.
- 在体外研究中,使用暴露于IL-6的C2C12核细胞和卫星细胞来研究分子机制.
- 评估了关键信号通路 (AKT/mTOR),自和线粒体功能.
主要成果:
- 在大鼠中,HMB补充剂部分预防了肌肉缩和力量丧失.
- HMB降低了缩标志物 (MuRF1) 的表达,并维持了肌原因子 (MyoG) 的水平.
- 在体外,HMB激活了AKT/mTOR通路,调节了自,保持了线粒体功能,并保护卫星细胞免受IL-6诱导的压力.
结论:
- HMB显示出对因不活动和蛋白质缺乏引起的肌肉缩的保护作用.
- HMB的益处是由AKT/mTOR途径,自调节和改善线粒体功能调节的.
- 在各种临床环境中,HMB显示出作为预防肌肉缩的治疗剂的前景.
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