项目名称: GDF1及GDF3介导的Nodal信号通路相关基因的突变与非综合征型先天性心脏病的相关性研究
项目编号: No.81470447
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: 肖建民
作者单位: 暨南大学
项目金额: 68万元
中文摘要: 非综合征型先天性心脏病(non-syndromic CHD)是CHD的主要类型,目前一般认为绝大多数非综合征型CHD为多基因遗传性疾病,但其确切的遗传学病因与致病机制尚不清楚。研究表明,GDF1及GDF3介导的Nodal信号通路在胚胎左右不对称体轴的建立(包括心脏的不对称发育)及心脏祖细胞的定向分化中发挥重要作用。我们前期的实验初步证实了该通路中单个基因的突变可能增加非综合征型CHD的遗传易感性。鉴于绝大部分非综合征型CHD为多基因遗传性疾病,从整个信号通道出发,我们假设认为,该通道中密切相关的多个基因突变的相互作用或累积效应与非综合征型CHD的发病密切相关。在本课题中,我们采用候选基因和病例-对照策略,对Nodal信号通路中密切相关的基因(GDF1、GDF3和NODAL)进行突变筛查,并进行分子生物学功能分析。课题的实施可望进一步揭示非综合征型CHD的遗传学病因,为疾病的早期预防提供依据。
中文关键词: 先天性心脏病;基因突变;分子遗传学;信号通路;遗传变异
英文摘要: Non-syndromic congenital heart defect (non-syndromic CHD) is the main type of CHDs and is considered to be polygenic disease.However,the genetic etiology and pathogenic mechanism of non-syndromic CHD remain unclear.It has been showed that the Nodal signaling pathway mediated by GDF1/GDF3 plays a crucial role in the establishment of embryonic left-right asymmetry patterning and the oriented differentiation of cardiac progenitor cells.In our previous experiments,we found that mutations of single gene in this pathway may predispose individuals to non-syndromic CHD. Considering the majority of non-syndromic CHD is a polygenic disease, we therefore postulate that mutations of related genes in the Nodal signaling pathway may have interacting and/or accumulating effects in the pathogenesis of non-syndromic CHDs.In this study,we are going to screen the mutations of related genes in the Nodal signaling pathway with a case-controlled method,then we will investigate the biological function of these mutations.This study will reveal the genetic etiology of non-syndromic CHD and provide the genetic basis of preventing non-syndromic CHD.
英文关键词: congenital heart defects;mutation;NODAL;GDF1;GDF3