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综合蛋白质组学和β-xybutyrylation分析在饥饿诱导的胃半肠肌肉重塑
Leilei Cui1,2, Chunping Huang1, Yu Su3,4
1Metabolic Control and Aging, Human Aging Research Institute and School of Life Science, Nanchang University, Jiangxi Key Laboratory of Aging and Diseases, Nanchang 330031, China.
Biology
|February 12, 2026
概括
饥饿会在骨肌肉中引发广泛的氨酸β-氧基化 (Kbhb),这是一种新奇的修饰,在禁食期间影响代谢酶和蛋白质功能. 这项研究揭示了Kbhbb.
科学领域:
- 肌肉代谢研究研究 肌肉代谢研究
- 后翻译修改后的修改.
- 营养缺乏的适应 营养缺乏的适应
背景情况:
- 骨肌肉在饥饿期间经历了显著的代谢变化.
- lysine β-hydroxybutyrylation (Kbhb) 是一种由代谢物衍生的修饰,与代谢有关.
- 在肌肉适应饥饿的过程中Kbhb的作用在很大程度上是未知的.
研究的目的:
- 为了研究在饥饿期间骨肌肉中 lysine β-hydroxybutyrylation (Kbhb) 的作用.
- 在食物剥夺后,在胃口肌肉中表征全球蛋白质和Kbhb变化.
- 了解Kbhb如何改变蛋白质功能,以应对能量缺乏.
主要方法:
- 小鼠被剥夺了72个小时的食物.
- 综合性定量蛋白质组学是在胃角肌肌肉上进行的.
- 用Kbhb修饰的进行了分析,以确定修饰的部位和蛋白质.
主要成果:
- 饥饿导致体重和肌肉质量丧失,系统β-基酸盐增加,以及广泛的Kbhb修饰.
- 蛋白质组学揭示了对核糖体蛋白的下调和对自和脂质代谢途径的上调.
- 确定了超过7500个Kbhb的位点,其中代谢酶的修饰增加,结构蛋白的修饰减少.
结论:
- Lysine β-hydroxybutyrylation 是一个在禁食期间骨肌肉中发生的动态,代谢响应的翻译后修饰.
- Kbhb在调节关键代谢通路的酶活性方面发挥着调节作用.
- 这些发现扩大了对肌肉新陈代谢中代谢驱动的调节机制的理解.
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