TRIB1通过对抗NRF2介导的抗氧化反应来调节肝脏的再生
Xinyue Sun1, Shuai Wang2, Xiulian Miao3
1State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China.
Cell death & disease
|June 24, 2023
概括
特里布尔斯同源1 (Trib1) 对于肝脏再生至关重要. 降低Trib1的调节通过改善氧化还原平衡和促进细胞增殖来增强肝脏的修复,揭示了肝脏恢复的新途径.
科学领域:
- 肝病学和再生医学 肝病学和再生医学
- 分子生物学和细胞信号传递
- 生物化学和氧化应激作用
背景情况:
- 肝脏再生对于受伤后的恢复至关重要,肝脏内氧化还原平衡起着至关重要的作用.
- 了解控制肝脏再生的分子机制对于开发治疗策略至关重要.
研究的目的:
- 研究Tribbles同源1 (Trib1) 在肝脏再生中的作用.
- 阐明Trib1影响肝脏修复的潜在分子机制.
主要方法:
- 在肝脏再生的动物和细胞模型中研究了Trib1表达.
- 在小鼠中利用部分肝切除术来评估Trib1对肝脏再生的影响.
- 研究了Trib1与核因子红色素2相关因子2 (Nrf2) 的相互作用及其对细胞氧化还原状态的影响.
- 分析了来自急性肝衰竭患者的肝样本.
主要成果:
- 在肝脏再生过程中,Trib1表达暂时下调.
- 肝细胞生长因子 (HGF) 通过肝脏X受体α (LXRα) 抑制了Trib1转录.
- 抑制Trib1增强了肝脏的再生,而Trib1过度表达抑制了肝脏的再生.
- 通过阻断其核积累,Trib1减弱了Nrf2的活动,影响了细胞内ROS和GSH水平.
- 在人类急性肝衰竭中,Trib1表达,Nrf2局部化和细胞增殖之间发现了相关性.
结论:
- Trib1 作为肝脏再生的负调节剂.
- Trib1通过Nrf2通路调节细胞内氧化还原恒温,从而影响肝脏的再生.
- 在肝脏再生过程中,Trib1代表了氧化还原平衡和细胞增殖之间的新联系,提供了潜在的治疗点.
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