CircHIPK3 sponges miR-558 to suppress heparanase expression in bladder cancer cells.
Yawei Li,Fuxin Zheng,Xingyuan Xiao,Fei Xie,Dan Tao,Chao Huang,Dong Liu,Miao Wang,Liang Wang,Fuqing Zeng,Guosong Jiang +10 more
TLDR
It is shown that circHIPK3, also named bladder cancer‐related circular RNA‐2 (BCRC‐2), is significantly down‐regulated in bladder cancer tissues and cell lines, and negatively correlates with bladder cancer grade, invasion as well as lymph node metastasis, respectively.Abstract:
Increasing evidences suggest that circular RNAs (circRNAs) exert crucial functions in regulating gene expression. In this study, we perform RNA‐seq and identify 6,154 distinct circRNAs from human bladder cancer and normal bladder tissues. We find that hundreds of circRNAs are significantly dysregulated in human bladder cancer tissues. We further show that circHIPK3, also named bladder cancer‐related circular RNA‐2 (BCRC‐2), is significantly down‐regulated in bladder cancer tissues and cell lines, and negatively correlates with bladder cancer grade, invasion as well as lymph node metastasis, respectively. Over‐expression of circHIPK3 effectively inhibits migration, invasion, and angiogenesis of bladder cancer cells in vitro and suppresses bladder cancer growth and metastasis in vivo . Mechanistic studies reveal that circHIPK3 contains two critical binding sites for the microRNA miR‐558 and can abundantly sponge miR‐558 to suppress the expression of heparanase (HPSE). Taken together, our findings provide evidence that circRNAs act as “microRNA sponges”, and suggest a new therapeutic target for the treatment of bladder cancer.read more
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Journal ArticleDOI
The biogenesis, biology and characterization of circular RNAs.
Lasse Sommer Kristensen,Maria S. Andersen,Lotte V. W. Stagsted,Karoline K. Ebbesen,Thomas B. Hansen,Jørgen Kjems +5 more
TL;DR: Advances in high-throughput RNA sequencing and circRNA-specific computational tools have driven the development of state-of-the-art approaches for their identification, and novel approaches to functional characterization are emerging.
Journal ArticleDOI
The Role of Non-coding RNAs in Oncology
TL;DR: For decades, research into cancer biology focused on the involvement of protein-coding genes, but an explosion of studies into ncRNA biology has shown that they represent a diverse and prevalent group of RNAs, including both oncogenic molecules and those that work in a tumor suppressive manner.
Book ChapterDOI
Circular RNAs Act as miRNA Sponges.
TL;DR: Current knowledge of the miRNA-circRNA interaction and mechanisms that influence gene expression are summarized.
Journal ArticleDOI
Past, present, and future of circRNAs.
TL;DR: Current knowledge about animal circRNAs is reviewed and new insights into potential circRNA functions, concepts of their origin, and possible future directions in the field are summarized.
Journal ArticleDOI
Circular RNA and its mechanisms in disease: From the bench to the clinic.
Bing Han,Jie Chao,Honghong Yao +2 more
TL;DR: Although their exact roles and mechanisms of gene regulation remain to be clarified, circRNAs have potential applications as disease biomarkers and novel therapeutic targets.
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Journal ArticleDOI
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Thomas B. Hansen,Trine I. Jensen,Bettina Hjelm Clausen,Jesper B. Bramsen,Bente Finsen,Christian Kroun Damgaard,Jørgen Kjems +6 more
TL;DR: This study serves as the first functional analysis of a naturally expressed circular RNA, ciRS-7, which contains more than 70 selectively conserved miRNA target sites, and is highly and widely associated with Argonaute proteins in a miR-7-dependent manner.
Journal ArticleDOI
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TL;DR: High-throughput sequencing of libraries prepared from ribosome-depleted RNA with or without digestion with the RNA exonuclease showed that ecircRNAs are abundant, stable, conserved and nonrandom products of RNA splicing that could be involved in control of gene expression.