项目名称: microRNA调节肿瘤抑制因子Caliban应答DNA损伤的机制
项目编号: No.31271480
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 生物科学
项目作者: 秘晓林
作者单位: 中国科学院高能物理研究所
项目金额: 85万元
中文摘要: miRNA是一类进化上高度保守的非编码单链RNA分子,在维持生物体自身平衡,细胞分化,增生和凋亡中具有重要作用。人类基因组中大约30%的基因受到miRNA的调控。近年来研究表明,miRNA在DNA损伤应答中有非常关键的作用。在研究成神经细胞发育的调节因子Prospero时,我们筛选到一个新基因Caliban,它能够调节Prospero在细胞中的定位,并具有肿瘤抑制因子的功能。我们已有的数据表明,Caliban 参与p53依赖性与非依赖性的细胞凋亡,通过JNK途径,调节caspases的表达; Caliban 与多个miRNA存在相互作用, miRNA可能协助Caliban调节DNA损伤诱导的凋亡。我们将研究DNA损伤条件下,miRNA对Caliban参与DNA损伤应答的调节作用和机制,损伤应答的关键激酶ATM和p53在其中的作用,为miRNA调节肿瘤抑制因子应答DNA损伤提供新的理论知识。
中文关键词: Hippo;Yki;Mask;miR-285;血脑屏障
英文摘要: miRNA is highly conserved single strand non-coding RNA, which has important functions in biogenesis, differentiation, proliferation and apoptosis. In human genome, close to 30% of human genes are regulated by miRNA. Latest studies suggest that miRNA is critical for DNA damage response. We have screened interacting proteins of Prospero, a transcription factor essential for asymmetrical division of neuroblast. We got a new gene named after Caliban, Caliban can function as a bipartite nuclear exporting mediator to regulate subcellular localization of Prospero. It also functions as a tumor suppressor. Our new data show that Caliban regulates both p53-dependent and -independent apoptosis, it works through JNK pathway and regulates expression of caspases. Recently, we found miRNAs bind to 3`UTR of caliban, which suggests that miRNAs may regulate caliban in DNA damage induced apoptosis. In this project, we will study how miRNAs regulate Caliban functions in DNA damage response, its relations with kinase ATM and p53, to provide more information of working mechanisms of miRNA in DNA damage response.
英文关键词: Hippo;Yki;Mask;miR-285;blood-brain barrier