CoQ 不平衡驱动反向电子运输以破坏肝脏代谢
Renata L S Goncalves1, Zeqiu Branden Wang1, Jillian K Riveros1
1Department of Molecular Metabolism, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
Nature
|May 28, 2025
概括
线粒体反应性氧物种 (mROS) 的产生与肥胖有关. 失效的辅酶Q (CoQ) 合成增加了CoQH2/CoQ比率,通过反向电子运输驱动mROS,这对代谢健康至关重要.
科学领域:
- 生物化学
- 细胞生物学
- 代谢疾病
背景情况:
- 线粒体反应性氧物种 (mROS) 在生理过程中起着关键作用.
- 失调的mROS产生与各种疾病有关,但其体内生成机制仍然难以捉摸.
- 了解mROS来源对于开发有效的治疗策略至关重要.
研究的目的:
- 阐明肥胖症中过度产生的mROS的确切来源和机制.
- 研究肝脏辅酶Q (CoQ) 合成和CoQH2/CoQ比率在mROS生成中的作用.
- 确定肥胖和相关疾病中代谢平衡的潜在治疗点.
主要方法:
- 在体内利用遗传和药理模型研究肥胖患者的mROS产生.
- 评估肝脏辅酶Q (CoQ) 合成和CoQH2/CoQ比率.
- 通过复杂I的反向电子运输 (RET) 调查了mROS生成的机制.
主要成果:
- 在肥胖时,肝脏的CoQ合成受损,导致CoQH2/CoQ比率升高.
- 这种较高的比率导致复合体I的RET过度产生mROS.
- 在肥胖症患者中,抑制的CoQ合成和增加的CoQH2/ CoQ比率与疾病的严重程度相关.
- RET被认为是维持新陈代谢健康的关键途径.
结论:
- 鉴定了由CoQ合成和RET受损驱动的肥胖症病态mROS产生的一种特定机制.
- CoQH2 / CoQ比率是mROS产生的关键指标,也是肝硬化病的严重程度.
- 针对这种mROS生成途径有望保护肥胖患者的新陈代谢平衡.
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