通过脂肪酸摄入,TSPO消耗会加剧肥胖症
Yuchang Li1, Liting Chen1, Chantal Sottas1
1Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, California, USA.
Journal of cellular and molecular medicine
|April 8, 2025
概括
转位蛋白 (TSPO) 缺乏在老鼠中恶化简单脂肪,通过增加脂肪酸吸收和损害线粒体功能,促进早期代谢功能障碍相关的脂肪性肝病 (MASLD).
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 代谢疾病 代谢疾病
背景情况:
- 转位蛋白 (TSPO) 在体外损失会导致简单脂肪 (SS).
- 在SS和MASLD中TSPO的体内作用仍然不清楚.
- 假设:TSPO损失促进了早期的MASLD.
研究的目的:
- 为了研究TSPO缺乏对简单肥胖症的体内影响.
- 阐明TSPO影响早期MASLD进展的机制.
主要方法:
- 使用的野生型 (WT) 和TSPO淘汰 (KO) 鼠被养成NASH诱导的饮食.
- 分析了代谢参数,脂质生成,脂肪酸吸收和线粒体功能.
- 评估了蛋白质表达 (FASN,CD36,CPT1A,RAPTOR) 和自标志物.
主要成果:
- 在TSPO KO小鼠中,胰岛素耐药性增加,高胆固醇血症和肝硬化症增加.
- 通过CD36.6增强de novo脂质生成和自由脂肪酸的吸收.
- 线粒体功能受损,乙-CoA升高,自抑制.
- 由于TSPO缺乏,通过增加CPT1A表达来促进脂肪酸氧化.
结论:
- 在早期的MASLD中,TSPO缺乏会加剧简单肥胖症的进展.
- 机制包括增强的CD36介导脂肪酸吸收,升高的乙CoA,线粒体功能障碍和自功能受损.
- TSPO在调节肝脂代谢和线粒体功能方面发挥着至关重要的作用.
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