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高密度胆固醇的功能取决于肝细胞应激防御因子 Nrf1 和 Nrf2
Michael J Trites1, Brynne M Stebbings1, Hiroyuki Aoki2
1Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, SK, Canada.
Frontiers in physiology
|July 28, 2023
概括
肝细胞核因子红色素2相关因子-1 (Nrf1) 和-2 (Nrf2) 对于产生功能性高密度脂蛋白 (HDL) 至关重要. 它们的联合删除会损害HDL.
科学领域:
- 分子生物学分子生物学
- 心血管研究研究心血管研究
- 肝病学 肝病学是一种肝病学.
背景情况:
- 高密度脂蛋白 (HDL) 对于维持平衡和预防心血管疾病中的组织损伤至关重要.
- 肝脏的压力可能会对HDL的丰富性,组成和功能产生负面影响,特别是在诸如动脉样硬化等疾病中.
- 应激防御转录因子在肝细胞高密度胆固醇 (HDL) 生产中的作用在很大程度上仍未知.
研究的目的:
- 调查肝细胞中核因子红色素2相关因子-1 (Nrf1) 和-2 (Nrf2) 是否促进功能性HDL的产生.
- 确定Nrf1和Nrf2删除对高脂胆固醇,蛋白质组成和在代谢压力下的功能的影响.
主要方法:
- 利用基因工程小鼠食一种轻微的代谢压力饮食.
- 研究了Nrf1,Nrf2或两者的肝细胞特异性缺失对HDL参数的影响.
- 评估了HDL的胆固醇外流能力和对内皮细胞的抗炎作用.
主要成果:
- Nrf1和Nrf2的联合删除,但不是单独的删除,显著降低了HDL胆固醇和阿波脂蛋白A1水平.
- 结合Nrf1/Nrf2删除损害了HDL从巨细胞接受胆固醇的能力,并抵消TNF-α诱导的炎症.
- 观察到HDL蛋白质组的显著变化,与肝脏基因表达特征相关.
结论:
- 肝细胞 Nrf1 和 Nrf2 互补作用,调节 HDL 丰度和组成,确保生产功能可行的 HDL.
- 加强肝脏的应激防御机制可能会改善HDL的动脉动脉保护功能.
- 这项研究提供了关于将肝脏压力与HDL功能联系起来的分子机制的见解.
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