期刊
CELL DEATH & DISEASE
卷 11, 期 5, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41419-020-2514-0
关键词
-
类别
资金
- National Natural Science Foundation of China [81602145, 8180110902, 8167101715, 8160101912]
- Jiangsu Provincial Natural Science Foundation [BK20171509]
- Jiangsu Provincial Medical Youth Talent, The Project of Invigorating Health Care through Science, Technology Education [QNRC2016649]
- China Postdoctoral Science Foundation [2018M632265]
- Talents Program of Jiangsu Cancer Hospital [YC201812]
Circular RNAs (circRNAs), non-coding RNAs generated by precursor mRNA back-splicing of exons, have been reported to fulfill multiple roles in cancer. However, the role of quite a lot circRNAs in colorectal cancer (CRC) remains mostly unknown. Herein, we explored the expression profiles of circRNAs in 5 paired samples of CRC patients by microarray and noted a circRNA, hsa_circ_0005615 (circ5615), was significantly upregulated in CRC tissues. Circ5615 was derived from exon 2 of NFATC3 and its upregulation was tightly correlated with higher T stage and poor prognosis in CRC patients. Studies in vitro and in vivo demonstrated that knockdown of circ5615 in cancer cells inhibited proliferation and cell cycle acceleration, while overexpression promoted malignant phenotypes. Mechanistically, RNA immunoprecipitation, biotin-coupled probe pull-down and luciferase reporter assays revealed circ5615 effectively bound to miR-149-5p and might play a role like miR-149-5p sponge. Additionally, tankyrase (TNKS), regulator of beta -catenin stabilization, was identified as circ5615 downstream and the potential miR-149-5p targets by RNA-seq and bioinformatics analysis. We further verified the upregulation of beta -catenin and cyclin D1 induced by circ5615. Our results indicated that circ5615 exerted oncogenic function as competing endogenous RNA (ceRNA) of miR-149-5p to release TNKS and activated Wnt/beta -catenin pathway.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据