与雌激素相关的受体通过合作和独特的行动调节先天和适应性肌肉线粒体能量
Weiwei Fan1, Tae Gyu Oh1,2, Hui J Wang1
1Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037.
概括
与雌激素相关的受体 (ERR) 控制肌肉能量. ERRα和ERRγ直接调节线粒体基因,对于休息肌肉功能和运动适应都至关重要.
科学领域:
- 肌肉生理学和线粒体生物学.
- 细胞能量的转录调节.
- 骨肌肉适应和运动科学.
背景情况:
- 线粒体能量代谢对肌肉功能至关重要,并通过转录调节.
- 与雌激素相关的受体 (ERR) 是已知的线粒体能量学的调节者.
- 在不同类型的肌肉纤维和在适应性重塑过程中,ERR异型的不同作用在很大程度上是未知的.
研究的目的:
- 研究ERR异型 (ERRα和ERRγ) 在骨肌肉中的不同和合作作用.
- 阐明ERRs在调节基底和适应性线粒体能量代谢中的功能.
- 为了确定ERRs在运动诱导的线粒体生物生成中的参与.
主要方法:
- 使用肌肉特定的单一和组合淘汰赛小鼠模型.
- 采用初级髓管培养来研究PGC1α诱导的线粒体生物发生.
- 进行基因表达分析和染色体免疫沉,以评估直接的基因调节.
主要成果:
- 确定了ERRα和ERRγ在不同肌肉中调节线粒体能量代谢中的合作和独特作用.
- 证明ERRα和ERRγ都对适应性线粒体生物发生在运动训练的反应中至关重要.
- 表明ERRα,但不是ERRγ,是PGC1α诱导的神经管中的线粒体生物生成不可或缺的.
- 发现ERRs直接结合并控制大多数线粒体能量基因的表达,通常是通过协作结合.
结论:
- ERRα和ERRγ在骨肌肉中控制先天性和适应性线粒体能量方面发挥着关键和直接的作用.
- 这些ERR异型在调节线粒体重塑方面表现出独特的功能,特别是在对运动的反应中.
- 这些发现强调了ERR对肌肉中关键代谢基因的直接转录控制.
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