项目名称: ACE2-Ang-(1-7)-Mas轴通过抑制氧化应激介导肝脏脂肪变性的分子机制研究
项目编号: No.81200641
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 医学二处
项目作者: 曹曦
作者单位: 首都医科大学
项目金额: 23万元
中文摘要: 肾素血管紧张素系统(RAS)的经典途径ACE-AngII-ATR轴介导非酒精性脂肪性肝病(NAFLD)的发生和发展。我们前期对RAS的新途径ACE2-Ang-(1-7)-Mas 轴的研究发现,过表达ACE2能抑制肝细胞内脂肪的积累,抑制肝细胞中ROS的产生,同时Ang-(1-7)也能抑制ROS的产生,提示RAS新途径与经典轴对NAFLD的作用相反。本课题假设ACE2-Ang-(1-7)-Mas轴通过抑制氧化应激介导肝脏脂肪变性。我们拟从动物和细胞水平,诱导肝脏脂肪变性的ACE2-/-小鼠和脂肪变性的HepG2细胞,利用分子生物学技术研究ACE2-Ang-(1-7)-Mas 轴对肝脏脂肪变性的影响,氧化应激在这一过程中的作用,以及ACE2-Ang-(1-7)-Mas 轴介导的肝脏脂肪变性与氧化应激信号通路之间的关系,为NAFLD的预防和治疗提供新的药物研发思路和药物作用靶点。
中文关键词: 肾素-血管紧张素系统;血管紧张素转化酶2;非酒精性脂肪肝;胰岛素抵抗;脂代谢
英文摘要: The classical pathway of Renin angiotensin system (RAS), ACE-AngII-ATR axis, mediates the occurrence and development of nonalcoholic fatty liver disease (NAFLD). Our previous research on ACE2-Ang-(1-7)-Mas axis found that, overexpression of ACE2 can inhibit the intracellular lipid accumulation and the production of ROS in liver cells, at the same time Ang-(1-7) can inhibit the production of ROS. These results bring the possibility that ACE2-Ang-(1-7)-Mas axis and ACE-AngII-ATR axis may play an opposite role on mediating hepatic steatosis. We plan to using molecular techniques to study ACE2-Ang-(1-7)-Mas axis on the effects of hepatic steatosis in ACE2-/ - mice and HepG2 cells, to reveal the relationship between hepatic steatosis and the signal pathway of oxidative stress, and provide new drug research and development ideas for the prevention and treatment of NAFLD.
英文关键词: RAS;ACE2;NAFLD;insulin resistance;lipid metabolism