中文摘要：

MicroRNAs （miRNAs）是一种重要的转录后水平进行调控的非编码小分子RNA.目前已发现许多miRNAs 参与细胞增殖、分化、发育及凋亡等复杂的生物进程,其中miR126是一种来源于Egfl7第7个内含子的保守型内含子miRNA,主要在哺乳动物的内皮细胞（Endothelial cells,ECs）及浆细胞样树突状细胞（Plasmacytoid dendritic cells,pDCs）内表达,参与血管的新生及癌细胞的增殖与迁移.最新的研究表明,miR126是迄今唯一参与先天性免疫平稳期病毒应答反应的miRNA,预示着miR126有可能成为治疗癌症及免疫缺陷病的靶标分子.文章综述了miR126在血管新生和癌症中的功能,并着重介绍了miR126与先天性免疫的关系.

英文摘要：

MicroRNAs （miRNAs） are endogenous non-coding small RNAs that negatively regulate gene expression at the post-transcriptional level by base pairing with target mRNAs. Many miRNAs have been proven to regulate a broad range of processes, including proliferation, differentiation, development and apoptosis, miR126 is encoded by intron 7 of the EGF- like domain 7 （EgflT） gene and highly expressed in human endothelial cells （ECs） and plasmacytoid dendritic cells QaDCs）. Based on the current knowledge, miR126 is involved in angiogenesis and cancer. Also miR126 is the first miRNA which has been reported to involve in preconditioning the responsiveness of the host to pathogen infection in the steady state. This implicated that miR126 may be the potential therapeutic target for cancer and autoimmune diseases. In this review, we summarize the fimctions of miR126 in angiogenesis and cancer, and emphasize its relationship with innate immune re- sponse.