转基因酶通过限制因诺辛诱导的线粒体活动来促进MAFLD
Lingfeng Tong1, Zhangbing Chen1, Yangyang Li2
1Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
Cell metabolism
|March 28, 2024
概括
与代谢功能障碍相关的脂肪肝疾病 (MAFLD) 涉及高水平的转基因酶 (TKT) 酶. 用N-甲胺-siRNA合物向TKT显示出治疗这种常见肝病的前景.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 代谢途径 代谢途径
- 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肝疾病 (MAFLD) 影响全球25%,没有批准的治疗方法.
- 肝转基因酶 (TKT) 是酸通路酶,在MAFLD中表达高.
- 超胰岛素血症通过胰岛素受体-C/EBPα通路驱动TKT的表达.
研究的目的:
- 研究肝转基因酶 (TKT) 在MAFLD病变发生中的作用.
- 探索针对MAFLD中TKT的治疗潜力.
主要方法:
- 在人类和小鼠MAFLD模型中的代谢和蛋白质组分析.
- 肝脏特异性TKT过度表达和淘汰赛小鼠模型.
- 代谢流量分析和N-乙甲胺 (GalNAc) -siRNA联合疗法.
主要成果:
- 超胰岛素血症对TKT的表达进行上调,对MAFLD的进展至关重要.
- 删除TKT可以提高因诺辛水平,激活PKA-CREB,促进酸丁胆合成,改善线粒体功能.
- 胰岛素诱导的TKT限制了依赖氨酸的线粒体活性.
- 向TKT的GalNAc-siRNA在小鼠MAFLD模型中表现出治疗效果.
结论:
- 超胰岛素血症调节TKT介导的胰岛素代谢和线粒体功能在MAFLD.
- 针对肝脏TKT是MAFLD预防和治疗的新治疗策略.
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