非正规的BIM调节的能量代谢决定了药物诱导的肝硬化
Rebekka Lambrecht1, Franziska Rudolf1, Anna-Katharina Ückert2
1Biochemical Pharmacology, Department of Biology, University of Konstanz, Universitätsstrasse 10, 78464, Konstanz, Germany.
Cell death and differentiation
|November 24, 2023
概括
过量服用青会通过促进缩导致肝功能衰竭. 通过破坏能量代谢,BIM蛋白将细胞死亡转移到亡,而其缺乏则通过有利于糖解保护肝脏.
科学领域:
- 肝病学和毒理学 肝病学和毒理学
- 细胞死亡机制 细胞死亡机制
- 线粒体生物学和代谢
背景情况:
- 过量服用类 (乙氨基,APAP) 会导致严重的肝毒性,其特征是线粒体损伤和从亡转变为亡,最终导致急性肝衰竭.
- 控制细胞死亡途径中这种过渡的精确机制以及特定调节蛋白的作用仍然不完全理解.
研究的目的:
- 为了研究调节细胞亡的BCL-2同类BIM (Bcl2l11) 在APAP过量后的细胞亡和亡细胞死亡模式之间的切换中的作用.
- 阐明BIM如何影响细胞生物能量,并保护肝细胞免受APAP诱导的肝损伤.
主要方法:
- 研究了APAP过量剂在肝细胞中诱导的细胞死亡模式的切换.
- 研究了BIM在调节细胞生物能量的作用,包括ATP的产生和代谢特征 (糖解与氧化酸化) 的作用.
- 利用葡萄糖水平的调节和米托福辛的删除来评估氧化酸化在APAP毒性的作用.
- 评估了反应性氧物种 (ROS) 水平和肝细胞中的髓.
主要成果:
- 通过增强ATP的产生和促进向糖解转移,保护BIM缺陷免受APAP诱导的肝损伤.
- 严重的APAP毒性仅在依赖氧化酸化的细胞中观察到,而不是那些使用糖解的细胞.
- 甘油性肝细胞维持了较高的ATP水平,减少了ROS,并促进了受损线粒体的线粒体衰变.
结论:
- 通过调节细胞生物能量,BIM在促进亡和APAP诱导的肝毒性方面发挥着非正规的作用.
- 代谢途径,特别是糖解和氧化酸化之间的平衡,是药物诱导的肝损伤的关键决定因素.
- 在肝毒性的背景下,BIM被确定为糖解,线粒体呼吸和氧化应激信号的关键调节器.
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