Baf155通过HIF-1a信号传递调节骨肌肉的新陈代谢
Jong-Seol Kang1, Dongha Kim2, Joonwoo Rhee1
1School of Biological Sciences, Seoul National University, Seoul, South Korea.
PLoS biology
|July 21, 2023
概括
这项研究揭示了Brg1/Brm相关因子155 (Baf155) 对于缺氧诱导因子-1α (HIF-1α) 在骨肌肉中的信号传递至关重要. 通过提升氧化代谢,去除Baf155可以提高耐力.
科学领域:
- 运动生理学 运动生理学
- 分子生物学分子生物学
- 细胞的新陈代谢
背景情况:
- 肌在运动期间经历缺氧,激活缺氧诱导因子-1α (HIF-1α).
- 在低氧条件下,HIF-1α调节参与糖溶性代谢的基因.
研究的目的:
- 调查Brg1/Brm相关因子155 (Baf155) 在骨肌内HIF-1α信号传递中的作用.
- 阐明BAF155影响骨肌肉代谢和运动能力的机制.
主要方法:
- 使用骨肌特异性基因切除小鼠模型研究Baf155.5.
- 采用染色体免疫沉 (ChIP) 分析来检查 Baf155 与 HIF-1α 的相互作用.
- 研究了信号转换器和转录3激活器 (pSTAT3) 在Baf155介导调节中的作用.
主要成果:
- 对Baf155的肌肉特异性切除降低了HIF-1α功能,减少了运动期间的乳酸生产.
- Baf155 缺乏增强了氧化代谢,导致肌肉内腺三酸盐 (ATP) 水平增加.
- 发现Baf155调节了HIF-1α的DNA结合活性,需要pSTAT3进行同激活.
结论:
- Baf155对于HIF-1α信号传递和骨肌肉中的能量代谢调节至关重要.
- Baf155,pSTAT3和HIF-1α之间的相互作用对于控制骨肌肉对缺氧的反应至关重要.
- 准Baf155可能提供一种提高耐力运动能力的策略.
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