由于持续高脂的UCP1降低,促进NK细胞亡,加剧非酒精性肝纤维化.
Min Gu1,2, Yu Zhang1,3, Zhijie Lin1,2
1Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou, PR China.
Cell death & disease
|July 20, 2024
概括
自然杀手 (NK) 细胞中脱离蛋白1 (UCP1) 缺乏会损害它们的功能,恶化非酒精性脂肪肝炎 (NASH) 和肝纤维化. 高脂质进一步降低UCP1,促进NK细胞死亡和疾病进展.
科学领域:
- 线粒体生物学 线粒体生物学
- 免疫学 免疫学 免疫学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 解蛋白1 (UCP1) 通过线粒体质子泄漏对热生成至关重要.
- 自然杀手 (NK) 细胞活动受损与非酒精性肝纤维化有关.
- 在先进的非酒精性脂肪性肝病 (NAFLD) 中观察到NK细胞中UCP1表达的减少.
研究的目的:
- 研究UCP1在NK细胞功能中的作用及其对非酒精性脂肪肝炎 (NASH) 进展的贡献.
- 阐明UCP1缺乏和高脂质暴露影响NK细胞活力和肝纤维化的机制.
主要方法:
- 使用的UCP1淘汰赛 (UCP1-/-) 和floxed小鼠 (UCP1flox/flox-NCR1cre) 被食甲素-胆饮食 (MCD).
- 进行NK细胞活动测定,RNA测序 (RNA-seq) 和电子显微镜.
- 通过PPARγ/ATF2轴研究NK细胞亡途径和UCP1通过脂肪酸 (PA) 调节.
主要成果:
- 在接受MCD养的小鼠中,NK细胞中的UCP1缺陷加剧了肝纤维化.
- UCP1-/- NK细胞表现出受损的生物活性和增强的线粒细胞衰变相关基因转录.
- 结合UCP1缺乏和高脂暴露,通过DRP1S616诱导NK细胞亡,并降低了线粒细胞灭菌.
- 持续高棕酸 (PA) 治疗通过PPARγ/ATF2轴对NK细胞的UCP1进行了下调.
结论:
- NK细胞中的UCP1在NASH进展到肝纤维化的过程中起着保护作用.
- 持续高脂暴露会降低UCP1的表达,并促进NK细胞亡,导致肝纤维化.
- 准NK细胞中的UCP1可能为NASH相关的肝纤维化提供治疗策略.
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