项目名称: MicroRNA-27a 调控血管钙化及机制研究
项目编号: No.81500392
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 医药、卫生
项目作者: 汪月
作者单位: 上海交通大学
项目金额: 18万元
中文摘要: 血管钙化是反映心血管疾病严重程度及影响其预后的主要因素,病理显示糖尿病患者血管钙化异常明显。我们前期研究发现,糖尿病患者EPCs上miR-27a表达明显下降,并与调控血管钙化的多种关键蛋白和信号通路密切相关,提示miR-27a可能是调控血管钙化的关键靶点。本研究首先体外探讨EPCs 上miR-27a 表达水平与糖尿病氧化应激环境的相关性,并建立氧化应激诱导的血管钙化模型,通过转染miR-27a 模拟物或抑制剂,阐明miR-27a 调控EPCs 向成骨样细胞分化或抑制EPCs 分化具体过程和机制;体内建立小鼠血管钙化模型,观察miR-27a对血管钙化程度的影响,并探讨miR-27a对Runx2、IRS-1、OPN 和BMP2 表达以及相关信号传导通路Notch, Wnt和/或TGFβ/BMP等的作用,最终体内外明确miR-27a对血管钙化作用及机制,为血管钙化防治提供新的靶点。
中文关键词: 动脉粥样硬化;2型糖尿病;内皮祖细胞;血管钙化;机制
英文摘要: Vascular calcification is a key risk factor of cardiovascular disease. Our previous study showed that miR-27a was aberrantly down-regulated in the endothlial progenitor cells(EPCs) in DM patients and artery calcification patients. We also found OPN and BMP2 expression increased through its target Runx2 and IRS-1 and thus could potentiate EPCs transfer to Osteoclast-like cells. In this study, we established a series of protocols to explore the signaling pathways Notch,Wnt and TGFβ/BMP of miR-27a in the process of EPCs transfer to Osteoclast-like cells(OLCs) and artery calcification. We further plan to testify these effects in vivo in APOE-/- mice and miR-27a-/-mice. Our study will certainly contribute to clarify the mechanisms of miR-27a-regulated EPCs-OlCs transition and to prevent the vascular complications in patients with artery calcification.
英文关键词: atherosclerosis;Type 2 diabetes mellitus;endothelial progenitor cells;vascular calcification;mechanism