CircSETD3 (Hsa_circ_0000567) acts as a sponge for microRNA-421 inhibiting hepatocellular carcinoma growth
Liangliang Xu,Xinfu Feng,Xiangyong Hao,Peng Wang,Yanfang Zhang,Xiaobo Zheng,Lian Li,Shengsheng Ren,Ming Zhang,Ming-Qing Xu +9 more
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TLDR
CircSETD3 is a novel tumour suppressor of HCC and is a valuable prognostic biomarker that acts as a sponge for miR-421 and verified that mitogen-activated protein kinase (MAPK)14 is a Novel target of miR -421.Abstract:
Circular RNAs (circRNAs) play important roles in tumourigenesis and tumour progression. However, the expression profiles and functions of circRNAs in hepatocellular carcinoma (HCC) are largely unclear. The expression profiles of circRNAs in HCC were identified through microarray analysis and were validated through quantitative reverse transcription polymerase chain reaction (qRT-PCR). Survival curves were plotted using the Kaplan-Meier method and compared using the log-rank test. The circular structure of candidate circRNA was confirmed through Sanger sequencing, divergent primer PCR, and RNase R treatments. Proliferation of HCC cells was evaluated in vitro and in vivo. The microRNA (miRNA) sponge mechanism of circRNAs was demonstrated using dual-luciferase reporter and RNA immunoprecipitation assays. CircSETD3 (hsa_circRNA_0000567/hsa_circRNA_101436) was significantly downregulated in HCC tissues and cell lines. Low expression of circSETD3 in HCC tissues significantly predicted an unfavourable prognosis and was correlated with larger tumour size and poor differentiation of HCC in patients. In vitro experiments showed that circSETD3 inhibited the proliferation of HCC cells and induced G1/S arrest in HCC cells. In vivo studies revealed that circSETD3 was stably overexpressed in a xenograft mouse model and inhibited the growth of HCC. Furthermore, we demonstrated that circSETD3 acts as a sponge for miR-421 and verified that mitogen-activated protein kinase (MAPK)14 is a novel target of miR-421. CircSETD3 is a novel tumour suppressor of HCC and is a valuable prognostic biomarker. Moreover, circSETD3 inhibits the growth of HCC partly through the circSETD3/miR-421/MAPK14 pathway.read more
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Emerging role of tumor-related functional peptides encoded by lncRNA and circRNA
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TL;DR: The aim of this review is to provide a theoretical basis and relevant references, which may promote the discovery of more functional peptides encoded by ncRNAs, and further develop novel anticancer therapeutic targets, as well as diagnostic and prognostic cancer markers.
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The circRNA circSEPT9 mediated by E2F1 and EIF4A3 facilitates the carcinogenesis and development of triple-negative breast cancer
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Emerging roles of circRNA in formation and progression of cancer.
TL;DR: In this review, not only the function and mechanism, but also the experimental methods of circRNA are summarized to help in the discovery of novel biomarkers, the therapeutic targets and their potential significance in diagnosis and treatment of diseases.
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The role of N 6 -methyladenosine (m 6 A) modification in the regulation of circRNAs
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Biological Roles and Mechanisms of Circular RNA in Human Cancers.
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