SIRT1 调节肝脏VLDlr 的水平
Mona Peyman1,2,3,4, Anna Babin-Ebell1,2,3,4, Rosalía Rodríguez-Rodríguez5,6
1Department of Pharmacology, Toxicology and Therapeutic Chemistry, Faculty of Pharmacy and Food Sciences, Barcelona, Spain.
Cell communication and signaling : CCS
|May 28, 2024
概括
赛尔图因1 (SIRT1) 激活通过降低非常低密度脂蛋白受体 (VLDLR) 水平来减少脂肪肝. 这项研究揭示了SIRT1.
科学领域:
- 代谢性疾病研究研究.
- 肝病的机制 肝病的机制
- 细胞信号传递途径 细胞信号传递途径
背景情况:
- 细胞内膜网膜 (ER) 的压力会增加肝脏非常低密度脂蛋白受体 (VLDLR) 水平,促进脂肪肝.
- VLDLR促进了甘油丰富的脂蛋白进入肝脏的吸收.
研究的目的:
- 为了调查sirtuin 1 (SIRT1) 是否调节肝脏脂质积累.
- 为了确定SIRT1是否调节VLDLR水平以及随后的脂蛋白吸收.
主要方法:
- 使用的老鼠模型食了果糖,Sirt1敲击小鼠和用尼卡米辛治疗的小鼠.
- 采用人肝瘤细胞与siRNA,突尼卡米辛或特定抑制剂.
- 评估肝脏VLDLR和SIRT1蛋白水平,以及基因表达.
主要成果:
- 果糖养的老鼠和Sirt1淘汰的小鼠显示SIRT1降低和VLDLR水平增加.
- 人类细胞中的SIRT1抑制上调了VLDLR,依赖于缺氧诱导因子1α (HIF-1α).
- 在小鼠中SIRT1激活防止了尼卡米辛诱导的VLDLR增加.
结论:
- SIRT1在脂肪肝发育中起着保护作用.
- 通过负调节肝脏VLDLR水平,SIRT1减弱脂肪肝.
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