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Updated: Jul 15, 2025

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Skeletal Muscle Gender Dimorphism from Proteomics
Published on: December 14, 2011
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在后肢卸载诱导的缩开始时,转录组形状的生物性别差异
Stavroula Tsitkanou1, Francielly Morena da Silva1, Ana Regina Cabrera1
1Cachexia Research Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, Arkansas, United States.
American journal of physiology. Cell physiology
|September 25, 2023
概括
与雄性相比,雌性小鼠在不使用时会更快地失去肌肉. 转录组分析揭示了影响肌肉缩,线粒体功能和纤维化的性别特异性分子通路,这表明女性对某些退化方面有保护作用.
科学领域:
- 肌肉生理学和分子生物学
- 骨肌肉缩研究研究
- 进行比较的转录学.
背景情况:
- 废弃诱导的肌肉缩是一个重要的临床问题,特别是在老年人群,重症监护室和宇航员中.
- 之前的研究表明,肌肉缩的进展和分子基础上存在生物性别差异.
研究的目的:
- 在卸载诱导肌肉缩的发病和进展期间对雄性和雌性小鼠进行转录基因分析.
- 为了确定与骨肌肉不使用相关的性别特异性分子机制和时间模式.
主要方法:
- 雄性和雌性小鼠经历了后肢卸载 (HU) 的时间分别为24,48,72,168小时.
- 测量了肌肉重量,并使用RNA测序分析了胃腹肌.
- 进行了差异基因表达和途径分析,以比较男性和女性的反应.
主要成果:
- 女人显示肌肉损失从HU的24小时开始,而男性显示168小时后的损失.
- 蛋白质酶降解途径在男性上调的时间比女性长;Lcn2仅在女性上调.
- 女性表现出低调的原蛋白通路和较少明显的线粒体通路下调,表明潜在的保护机制,防止纤维化和线粒体退化.
结论:
- 雌性可能具有转录机制,可以保护它们免受不使用导致的线粒体退化和纤维化.
- 尽管存在潜在的保护机制,但在卸载过程中,与男性相比,女性似乎更容易受到快速肌肉消耗的影响.
- 显著的性别分歧存在于对卸载的转录组反应中,影响缩进展和分子通路.
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