伊拉非布拉诺通过PPARβ/δ上调节EMT诱导体S100A4通过PPARβ/δ上调节
Meijian Zhang1, Emma Barroso1, Maria Ruart1
1Department of Pharmacology, Toxicology and Therapeutic Chemistry, Faculty of Pharmacy and Food Sciences and Institute of Biomedicine of the University of Barcelona (IBUB), University of Barcelona, Barcelona, Spain; Spanish Biomedical Research Center in Diabetes and Associated Metabolic Diseases (CIBERDEM)-Instituto de Salud Carlos III, Madrid, Spain; Pediatric Research Institute-Hospital Sant Joan de Déu, Esplugues de Llobregat, Spain.
在一种与代谢功能障碍相关的脂肪肝炎 (MASH) 鼠标模型中,Elafibranor治疗改善了肝脏健康. 意想不到的是,它还增加了S100A4蛋白,通过PPARβ/δ激活促进了上皮质-介质酶过渡 (EMT).
科学领域:
- 肝病学 肝病学是一种肝病学.
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 和其炎症形式,代谢功能障碍相关的脂肪性肝炎 (MASH),是严重的健康问题.
- 埃拉非布拉诺是一种双重过氧体增殖器激活受体 (PPAR) α和β/δ激动剂,正在MASLD的III期试验中.
- 被食高脂肪饮食 (CD-HFD) 的小鼠作为MASH的相关模型,表现出肥胖和胰岛素抵抗.
研究的目的:
- 在MASH的小鼠模型中研究elafibranor的治疗效果.
- 阐明elafibranor作用背后的分子机制,特别是它对肝脏通路的影响.
主要方法:
- 给予elafibranor给被CD-HFD养的小鼠.
- 评估肝脏肥胖症,炎症和纤维化.
- 对表皮细胞-介质细胞过渡 (EMT) 标记物和相关蛋白质的分析 (S100A4,ASB2).
- 使用BRL-3A大鼠肝细胞和小鼠初级肝细胞的体外研究.
主要成果:
- 在CD-HFD小鼠中,Elafibranor治疗改善了肥胖症,炎症和纤维化.
- 意想不到的是,elafibranor通过PPARβ/δ激活增加了S100A4蛋白水平,这是一个已知的EMT促进剂.
- 这种elafibranor诱导的S100A4增加与改变的EMT标记物和降低ASB2水平有关,ASB2是一种降解S100A4.4的蛋白质.
结论:
- 伊拉非布拉诺通过减少肝损伤来证明MASH的治疗潜力.
- 一个新的发现是elafibranor能够通过PPARβ/δ增加肝脏S100A4并通过PPARβ/δ促进EMT的能力.
- 这些结果突出了elafibranor的复杂分子效应,超出了其抗炎和抗胆固醇性质.
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