项目名称: miR-424对子宫内膜癌生长的作用机制研究
项目编号: No.81460427
项目类型: 地区科学基金项目
立项/批准年度: 2015
项目学科: 医药、卫生
项目作者: 李权
作者单位: 遵义医科大学
项目金额: 48万元
中文摘要: 微小RNA(microRNA,miRNA)作为基因表达的转录后调控因子,广泛参与一系列的生物学过程。本课题组前期研究发现miR-424在子宫内膜癌组织中表达下调,过表达miR-424导致细胞克隆数降低、细胞周期G1/S进程受阻,细胞凋亡增加。利用生物信息学初步发现转录因子E2F6和E2F7的3'UTR具有miR-424的结合位点,并且miR-424抑制E2F6和E2F7的mRNA水平。在此项目基础上我们将对miR-424的候选靶基因E2F6和E2F7进行验证,并深入研究它们在细胞生物学功能方面如何介导miR-424发挥作用以及E2F6如何通过作用于miR-424的启动子而调控miR-424的表达。此外,我们还将利用cDNA芯片筛选E2F6和E2F7以外的其它靶基因。研究这些为阐明miR-424在子宫内膜癌中的作用机制奠定基础,为发现更多的肿瘤治疗靶标提供策略。
中文关键词: 微小RNA;miR-424;子宫内膜癌;细胞生长;基因调控
英文摘要: microRNAs (miRNAs) are key regulators of gene expression and involved in diverse biological processes. Our previous study found that miR-424 was downregulated in the endometrial cancer tissues, and miR-424 overexpression resulted in the inhibition of cell colony number, the G1/S arrest, and promoted cell apoptosis. The 3'UTR of the transcription factors, E2F6 and E2F7, had binding sites of miR-424, and miR-424 suppressed the expression of E2F6 and E2F7 mRNA. On the basis of these results, we will validate whether E2F6 and E2F7 are direct targets of miR-424, and investigate the roles of the targets in cell growth. We will also explore whether E2F6 regulates miR-424 expression through binding to its promoter. Finally, we will perform cDNA microarray for screening other targets of miR-424 besides E2F6 and E2F7. All these will reveal the regulatory mechanism of miR-424 in endometrial cancer cell growth, and provide beneficial strategy for the exploration of the rapeutic targets for endometrial cancer.
英文关键词: miRNA;miR-424;endometrial cancer;cell growth;gene expression