局部冷剂对蛋白质溶解和肌源性信号传递的孤立影响
Mark L McGlynn1, Alejandro M Rosales2, Christopher W Collins1
1School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, NE, 68182, USA.
Cryobiology
|June 28, 2023
概括
在4小时内局部冷施用会抑制骨肌肉生长标记物. 这项研究发现,隔离冷却抑制了myogenic基因表达,并增加了vastus lateralis中的蛋白质溶解基因表达.
科学领域:
- 运动生理学 运动生理学
- 分子生物学分子生物学
- 骨肌肉的适应 骨肌肉的适应
背景情况:
- 运动后的冷却可以抑制骨肌肉生长标记物.
- 与运动分开的局部冷剂对肌肉基因表达的具体影响尚不清楚.
研究的目的:
- 为了研究4小时局部冷应用对广侧面肌肉的影响.
- 为了确定对肌体和蛋白质分子反应的影响.
主要方法:
- 12名参与者接受了4小时的局部冷剂 (10°C) 或室温控制.
- 用RT-qPCR和Western Blot分析肌肉活检以检测与肌体发生和蛋白质分解相关的mRNA和蛋白质表达.
主要成果:
- 局部冷却显著降低了肌原性基因表达 (MYO-G,MYO-D1),同时增加了一些 (MYF6).
- 在局部冷却后,蛋白质分解基因表达 (FOXO3a,Atrogin-1,MURF-1) 升高.
- 通过冷应用,化与总4E-BP1蛋白的比例,这是一种肌肉质量的抑制剂,下降了.
结论:
- 隔离局部冷却4小时会对骨肌肉的分子反应产生负面影响.
- 寒冷的应用抑制了肌源性途径,并促进了骨肌肉中的蛋白质分解途径.
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