项目名称: 基于ER非经典途径调控网络发掘的新型植物雌激素- - 伪原薯蓣皂苷防治绝经后AS作用及机制研究
项目编号: No.81202526
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 药物学、药理学
项目作者: 肖静
作者单位: 中国医学科学院药用植物研究所
项目金额: 23万元
中文摘要: 绝经后女性冠心病的发病率明显增高,其主要原因是雌激素水平下降所致的动脉粥样硬化(AS)。传统雌激素替代疗法具有致瘤作用,发掘新型植物雌激素为解决这一问题提供了新思路。本项目前期工作发现,伪原薯蓣皂苷具有防治去卵巢雌鼠(模拟绝经后女性)AS作用,具体机制尚不清楚。前期实验表明,伪原薯蓣皂苷与雌激素受体α(ERα)亚型具有高亲和力,并提示其分子作用机制可能是通过选择性激活ER非经典途径实现的。本项目拟应用基因芯片等技术分析ER非经典途径调控网络中相关基因的表达差异,确定伪原薯蓣皂苷作用的靶点。体内应用ERα亚型敲除小鼠模型,体外建立ERα亚型沉默表达的细胞系,观察伪原薯蓣皂苷对血管细胞生物学功能的影响;同时进一步分析ER非经典途径调控网络的可能作用模式,解析伪原薯蓣皂苷的分子作用机制。该研究为发掘新型植物雌激素用以防治绝经后妇女心血管疾病提供理论依据。
中文关键词: 伪原薯蓣皂苷;动脉粥样硬化;雌激素受体;植物雌激素;
英文摘要: The leading cause of the rapidly increasing prevalence of coronary heart disease in post-menopause women is atherosclerosis caused by decreasing estrogen levels. The traditional hormone replacement therapy, however, may cause severe complications such as tumorigenesis. As such, exploration of new phytoestrogen may provide a new way to resolve this problem. Our previous studies revealed that pseudoprotodiocsin counteracted atherogenesis in ovariectomized female mice (mimic post-menopausal women). To date, the precise mechanisms are undefined. Besides, our preliminary results showed that pseudoprotodiocsin had high affinity with estrogen receptor (ER) α, and activated the non-genomic pathway of estrogen. In the present study, a serial of experimental approaches including microarray analysis is planed to be applied in order to evaluate gene expression profilings of non-genomic pathway of estrogen and find the corresponding targets of the drug. In vivo ERα knock-out mice and in vitro ERα-silencing cell lines will be used to observe biological function of blood vessel cells. Further analysis of the regulatory network of non-genomic pathway of estrogen will also be applied to explain the underlying mechanisms of the pharmacological actions of pseudoprotodiocsin. This study may provide theoretical evidences which may e
英文关键词: pseudoprotodiocsin;atherosclerosis;estrogen receptor;phytoestrogen;