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在NASH进展中,Foxo1-YAP-Notch1轴重新编程STING介导的先天性免疫力
Dongwei Xu1,2, Xiaoye Qu3,4, Tao Yang3
1The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA. xudongwei21@126.com.
Experimental & molecular medicine
|August 9, 2024
概括
在非酒精性脂肪肝炎 (NASH) 中准巨细胞Foxo1-YAP-Notch1轴可减少肝炎和纤维化. 这一途径是调节脂质代谢和NASH进展中的先天免疫力的关键.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 非酒精性脂肪肝炎 (NASH) 涉及肝炎,由天生的免疫激活驱动.
- 将脂质,纤维和炎症信号与NASH中的免疫调节分子联系在一起的机制尚未完全理解.
研究的目的:
- 调查巨信号通路,特别是Foxo1,YAP和Notch1在高脂肪饮食 (HFD) 诱导的NASH中的作用.
- 阐明这些途径如何调节肝脏中的脂质代谢,炎症和天生的免疫力.
主要方法:
- 使用了巨细胞特异性淘汰赛小鼠模型 (Foxo1M-KO,Foxo1/YAPM-DKO,Foxo1/Notch1M-DKO) 挑战了HFD.
- 分析了肝炎,脂肪和纤维化标志物.
- 研究的信号通路包括STING,TBK1,NF-κB和TGF-β1.1.
- 进行了库普弗细胞和肝星细胞 (HSC) 的共同培养实验.
- 采用了染色体免疫沉与测序 (ChIP-Seq) 和局部RNA杂交相结合.
主要成果:
- 大细胞Foxo1缺乏 (Foxo1M-KO) 改善了HFD诱导的肝损伤,减少了炎症和纤维化.
- 福克索1缺乏减少了STING,TBK1和NF-κB的激活,并减少了TGF-β1的释放.
- 相反,Foxo1/YAP或Foxo1/Notch1双重淘汰赛导致肝损伤恶化.
- 福克索1M-KO通过PGC-1α和核YAP调节了线粒体生物发生.
- 与YAP共定位的NICD (Notch细胞内域),针对cGAS (Mb21d1) 并重新编程STING功能.
结论:
- 巨细胞Foxo1-YAP-Notch1轴是NASH进展的一个关键调节器.
- 通过控制脂质代谢,炎症和天生的免疫力,准这一轴为NASH提供了潜在的治疗策略.
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