萨尔布塔摩尔的合成效应在固定后就会消失
Jelle C B C de Jong1,2,3, Tom S O Jameson4, Rob C Andrews5
1Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands.
萨尔布塔摩尔可以增强全身的葡萄糖排放和肌肉蛋白质合成,但不能防止肌肉在固定过程中失去肌肉质量. 它在不活跃的肌肉中有效性有限,这表明需要结合疗法.
科学领域:
- 肌肉生理学 肌肉生理学
- 代谢研究的研究.
- 药理学 药理学是指药理学的学科.
背景情况:
- 由于住院或受伤而导致肌肉不使用,导致肌肉质量迅速减少和胰岛素抵抗.
- 萨尔布塔摩尔是一种β2-上腺素受体激动剂,在停止使用时可以改善肌肉蛋白质合成和胰岛素敏感性.
- 它作为肌肉不使用的独立干预措施的有效性尚未确定.
研究的目的:
- 为了研究沙布塔摩尔对肌肉代谢在固定过程中的影响.
- 确定沙布塔摩尔是否可以减轻因不使用而引起的肌肉质量损失和胰岛素抵抗.
主要方法:
- 一个随机对照试验在人类使用2天前臂固定模型.
- 测量包括全身葡萄糖排放,前臂葡萄糖吸收和氨基酸动力学.
- 机械学研究使用了小鼠后腿固定模型,并采用了跟踪器方法和分子分析.
主要成果:
- 萨尔布塔摩尔增加了全身胰岛素刺激的葡萄糖排放,但没有改善前臂的葡萄糖吸收.
- 它减少了固定肌肉中的氨基酸外流,表明蛋白质合成增加或分解减少.
- 在小鼠中,萨尔布塔摩尔增加了肌肉蛋白质合成,但由于增加了轮流,肌肉质量没有增加;固定抑制了它对肌肉转录组的影响.
结论:
- 萨尔布塔摩尔对肌肉质量和葡萄糖吸收的益处仅限于活跃的肌肉.
- 固定阻碍了β2-上腺受体信号的有效性.
- 肌肉收缩和萨尔布塔摩尔的联合干预可以改善身体不活动期间的结果.
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