microRNA-1通过编程成年骨肌 pyruvate 代谢来调节代谢灵活性
Ahmed Ismaeel1, Bailey D Peck2, McLane M Montgomery3
1Department of Physiology, College of Medicine, University of Kentucky, Lexington, KY, USA; Center for Muscle Biology, College of Health Sciences, University of Kentucky, Lexington, KY, USA.
Molecular metabolism
|June 9, 2025
概括
微RNA-1 (miR-1) 对于维持骨肌肉的代谢灵活性,调节燃料选择和耐力至关重要. 它的损失会损害整个身体的新陈代谢,影响葡萄糖水平和运动表现.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 身体生理学 身体生理学
背景情况:
- 代谢灵活性,即能够切换燃料来源的能力,对于细胞健康至关重要.
- 代谢灵活性的丧失与各种疾病和细胞功能障碍有关.
- 微RNAs (miRNAs) 是基因表达的关键调节者,在肌肉生物学中具有已知的作用.
研究的目的:
- 研究微RNA-1 (miR-1) 在维持骨肌肉和全身代谢灵活性方面的作用.
- 在成年骨肌中识别miR-1的直接点.
- 阐明miR-1调节新陈代谢的机制.
主要方法:
- 骨肌特定的诱导性淘汰 (KO) 鼠标模型.
- 阿尔戈纳特2增强了交叉链接和免疫沉降序列 (AGO2 eCLIP-seq) 和RNA-seq.
- 综合的生物能量表型,蛋白质组学和代谢组学.
- 药理上抑制单碳酸盐载体4 (MCT4) 的作用.
主要成果:
- miR-1 KO小鼠表现出白天呼吸交换比率振荡的丧失和快速葡萄糖的升高.
- 确定了调节酸盐代谢的新型miR-1标,包括酸盐激酶 (Pkm).
- miR-1是通过酸盐代谢调节维持代谢灵活性所必需的.
- 抑制miR-1目标MCT4在KO小鼠中挽救了代谢灵活性.
- miR-1维持耐力活动,其下调与肌肉缩有关.
结论:
- miR-1 是骨肌肉和全身代谢灵活性的关键调节者.
- miR-1通过对参与酸盐代谢的基因的转录后调节来控制新陈代谢.
- 这项研究揭示了一种新的miRNA介导的代谢调节机制,对疾病和表现产生影响.
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