项目名称: TGF-β1-Smads信号传导通路在矽肺大鼠肺纤维化发生中的作用机理及芪丹颗粒剂的干预作用
项目编号: No.81473485
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 医药、卫生
项目作者: 王伟
作者单位: 山东大学
项目金额: 72万元
中文摘要: 矽肺为我国发病率最高的职业病。国内外最新研究显示TGF-β1-Smads信号传导通路调控失常对矽肺发病可能起关键作用,但具体调控机制尚未证实,影响深入认识矽肺发病机制。结合文献与课题组最新研究成果(国基金支持),我们认为:Smad3/Smad7基因突变或其启动子敏感性降低,导致TGF-β1-Smads信号传导通路负反馈环路被抑制、正反馈环路持续放大以及Smad3持续磷酸化,引起TGF-β1-Smads信号传导通路失调,导致肺纤维化。本研究拟通过大鼠模型实验,应用基因芯片、体外细胞干预等技术,检测分析Smad3/Smad7基因突变与Smad3/Smad7启动子敏感性;通过质粒转化技术阻断Smad3上游信号传导,观察 Smad3磷酸化状态,以阐释矽肺肺纤维化机制。同时应用临床证实确有疗效的芪丹颗粒剂干预,观察其对该通路失调的调节作用,揭示其疗效机制,为新药研发提供理论基础。
中文关键词: 芪丹颗粒剂;矽肺;TGF-β1-Smads信号传导通路;成纤维细胞
英文摘要: Silicosis is one of the occupational diseases with the highest incidence in China.Recent studies at home and abroad suggest that the lost control of TGF-beta1-Smads signaling pathways plays a dominant role in Silicosis, but the mechanism is still unclear which may hinder us from knowing the pathogenesis of Silicosis. According to the literatures and our latest research findings(NSFC supported),We thinkthe gene mutation of Smad3/Smad7 or reduced susceptibility of its promoter leads to inhibition of the negative feedback loop,the continuous amplification positive feedback loop of the TGF-β1-Smads pathway and the continuous phosphorylation of Smad3,which finally induce the pulmonary fibrosis。Our research will detect the promotor sensitivity of Smad3/Smad7 by in vitro cell interference and gene chip technology, block upstream signals conduction of Smad3 by plasmid conversion technology, and observe the continuous phosphorylation of Smad3. Our research will study the intervention mechanisms of Qidan Granules on regulation of TGF-beta1-Smads signaling pathways and provide theoretical basis for new drug research and development.
英文关键词: Qidan Granules;Silicosis;TGF-beta1-Smads Signaling Pathways;Fibroblast