项目名称: 利用内皮特异性转基因小鼠模型研究受TGF-beta调节的microRNA在血管形成中的功能
项目编号: No.31301203
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 生物科学
项目作者: 王俊
作者单位: 中国人民解放军军事医学科学院
项目金额: 23万元
中文摘要: TGF-beta信号通路在生理和病理情况下血管形成中发挥着重要的作用,这一点在小鼠和人类遗传学研究均被证明。一方面TGF-beta信号可以直接调节参与血管形成过程的下游靶分子,另一方面该信号通路也可以与其他如Notch等通路协同调节内皮与周细胞的相互作用从而维持血管完整性。此前我们的研究发现受TGF-beta调节的miR-29a介导了TGF-beta/Smad信号通路调节内皮细胞迁移成管以及调节血管形成的功能。为了进一步研究miR-29a在生理和病理状况下对血管形成的影响,以及它是否介导TGF-beta/Smad4调节内皮细胞与周细胞相互作用的功能,本项目将利用转基因和基因敲除小鼠模型,揭示miR-29a在小鼠血管发育和肿瘤血管形成中的功能,探索受TGF-beta调节的miR-29a在维持组织微环境稳态,介导细胞间相互作用的功能。为血管疾病和肿瘤基因治疗提供新的靶标分子.
中文关键词: 血管形成;microRNA;基因敲除;CRISPR/Cas9;
英文摘要: The transforming growth factor-beta (TGF-beta) pathway plays important roles in physiological and pathological angiogenesis. The critical roles of TGF-beta in angiogenesis have been revealed by genetic studies in human beings and mice. TGF-beta can directly regulates its target genes which get involved in the process of angiogenesis. Our previous study has revealed that Smad4 cooperates with Notch to regulate the transcription of N-cadherin, which is important to maintain vascular integrity. Fully understanding the molecular mechanisms of TGF-beta in regulating angiogenesis needs further investigation.We found that miR-29a was directly up-regulated by TGF-beta / Smad4. miR-29a overexpression promoted the formation of new blood vessesls in chick chorioallantoic membrane assay. miR-29a also promoted migration and tube formation ability of endothelial cells. Here we will investigate the role and mechanisms of miR-29a in regulating the interaction of endothelial cell and pericyte.
英文关键词: angiogenesis;microRNA;knockout mice;CRISPR/Cas9;