铁化是代谢功能障碍相关的脂肪性肝病中可向的有害因素
Cédric Peleman1,2,3, Stig Hellemans1, Geraldine Veeckmans3
1Laboratory of Experimental Medicine and Pediatrics, Infla-Med Centre of Excellence, University of Antwerp, Antwerp, Belgium.
Cell death and differentiation
|July 26, 2024
概括
铁亡,一种细胞死亡,有助于代谢功能障碍相关的脂肪性肝病 (MASLD). 抑制铁致死显示为MASLD患者的治疗策略有前途.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 细胞死亡研究 细胞死亡研究
- 生物化学 生物化学
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 是一种普遍存在的疾病,治疗选择有限.
- 在MASLD中肝细胞细胞死亡的精确机制尚未完全理解.
- 铁,一种依赖于铁的调节细胞死亡途径,已成为潜在的贡献者.
研究的目的:
- 调查铁死在MASLD病变发生中的作用.
- 根据铁亡途径,确定MASLD的潜在治疗点.
主要方法:
- 对经过活检验证的MASLD患者队列的分析,使用无监督的聚类来识别铁灭症的特征.
- 来自公共数据集的转录组数据分析,以确定具有改变铁灭防御的子组.
- 在使用缺乏胆的L-氨基酸定义高脂肪饮食 (CDAHFD) 的小鼠模型中,通过铁死诱导MASLD.
- 在CDAHFD和高脂肪高果糖饮食 (HFHFD) 模型中评估ferroptosis抑制剂UAMC-3203的疗效.
- 使用人类HepG2细胞进行体外研究,以评估脂肪酸补充剂对ferroptosis易感性的影响.
主要成果:
- 一小组MASLD患者表现出肝脏铁亡的特征,并降低了谷氨过氧化酶4 (GPX4) 水平.
- 在MASLD的公共转录基因数据集中观察到降低的铁灭防御.
- 在小鼠中,CDAHFD诱导了MASLD和铁;肝细胞特异性Gpx4淘汰赛加剧了发病率.
- 铁酶抑制剂UAMC-3203在小鼠模型中改善了脂肪和肝损伤标志物.
- 带有脂肪的HepG2细胞显示铁亡的防御能力下降,脂质组成发生变化,保持了铁亡的敏感性.
结论:
- 肝脏铁亡是MASLD的一个显著的有害因素.
- 铁灭抑制是MASLD的一种有前途的治疗策略.
- 在肝细胞中补充非多不和脂肪酸 (PUFA) 会改变脂质双层,可能保持铁亡的敏感性.
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