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以雌激素为依赖的TRX2激活逆转氧化应激和与稳态性疾病相关的代谢功能障碍
Alfredo Smiriglia1, Nicla Lorito1, Marina Bacci1
1Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134, Florence, Italy.
雌激素可以通过上调线粒体抗氧化剂 thioredoxin 2 (TRX2) 来预防与代谢功能障碍相关的脂肪性肝病 (MASLD). 这种机制有助于减少MASLD中的肝细胞损伤和脂质积累.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 呈现出一系列的肝病,可能导致肝硬化和肝癌等严重后果.
- 在绝经前妇女中,MASLD的发病率较低,这表明雌激素可能会对疾病的发展和进展提供保护.
研究的目的:
- 使用体外模型研究雌激素在MASLD中的保护作用.
- 阐明雌激素潜在的保护作用背后的分子机制,以防止脂肪性肝损伤.
主要方法:
- 利用临床前体外模型,包括不朽化的细胞系和人类胚胎干细胞衍生的肝细胞.
- 通过使用临床相关药物的诱导肥胖症,其次是雌激素治疗和TRX2干扰 (药理或遗传).
- 评估了脂质滴积累,活性氧物种 (ROS) 水平,线粒体功能和肝细胞分化标志物的表达.
主要成果:
- 牛排诱导的肝细胞显示脂质滴滴增加,ROS和线粒体功能障碍.
- 雌激素治疗减少了ROS和脂质积累,保持了线粒体的完整性.
- 雌激素的保护作用是由上调的线粒体硫素2 (TRX2) 介导的,并在TRX2中断时被废除.
结论:
- 雌激素可以通过调节线粒体TRX2,一种抗氧化系统,防止MASLD的进展.
- 向雌激素-TRX2通路可能为MASLD提供治疗策略.
- 干扰TRX2可以抵消雌激素的保护作用,证实它在减轻脂肪性肝损伤方面的关键作用.
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