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circRNA or "circular RNA"

Binhui Xie, Zhenxian Zhao, Qingquan Liu, Xiaonong Wang, Zhenjiang Ma, Heping Li
Circular RNAs (circRNAs) as new types of endogenous non-coding RNAs have been recently identified important roles in certain types of pathological responses, and in the occurrence and progression of a variety of human malignancies. In the present study, we aimed to evaluate the role of has_circ_0078710, which is back spliced by THBS2 gene in hepatocellular carcinoma (HCC). Expression levels of has_circ_0078710 were tested in both HCC tissue samples and cells using real-time qRT-PCR. Has_circ_0078710 was significantly unregulated in HCC tissues and cells...
October 17, 2018: Gene
Guoxiong Li, Min Huang, Yingqian Cai, Yuantao Yang, Xinlin Sun, Yiquan Ke
The prognosis for human glioma, a malignant tumor of the central nervous system, is poor due to its rapid growth, genetic heterogeneity, and inadequate understanding of its underlying molecular mechanisms. Circular RNAs composed of exonic sequences, represent an understudied form of noncoding RNAs (ncRNAs) that was discovered more than a decade ago, function as microRNA sponges. We aimed to assess the relationship between circ-U2AF1 (CircRNA ID: hsa_circ_0061868) and hsa-mir-7-5p and examine their effects on proliferation, apoptosis, and the metastatic phenotype of glioma cells regulated by neuro-oncological ventral antigen 2 (NOVA2)...
October 20, 2018: Journal of Cellular Physiology
M-Ashraf Altesha, Tiffany Ni, Afaan Khan, Kexiang Liu, Xiufen Zheng
Circular RNA (circRNA) are endogenous transcripts that display differential expression across species, developmental stages, and pathologies. Their lack of free ends confers increased stability when compared with linear transcripts, making them ideal candidates for future diagnostic biomarkers and therapeutic interventions. Increasing evidence has implicated circRNA in the pathogenesis of multiple cardiovascular diseases. In this paper, we summarize current understanding of circRNA biogenesis, properties, expression profiles, detection methods, functions, and their implication in cardiac pathologies including/ischemia reperfusion injury, myocardial infarction, cardiac senescence, cardiac fibrosis, cardiomyopathy, cardiac hypertrophy and heart failure, atherosclerosis, coronary artery disease, and aneurysm...
October 20, 2018: Journal of Cellular Physiology
Yajun Chen, Feng Yang, Erhu Fang, Wenjing Xiao, Hong Mei, Huanhuan Li, Dan Li, Huajie Song, Jianqun Wang, Mei Hong, Xiaojing Wang, Kai Huang, Liduan Zheng, Qiangsong Tong
Argonaute 2 (AGO2), the core component of microRNA (miRNA)-induced silencing complex, plays a compelling role in tumorigenesis and aggressiveness. However, the mechanisms regulating the functions of AGO2 in cancer still remain elusive. Herein, we indentify one intronic circular RNA (circRNA) generated from AGO2 gene (circAGO2) as a novel regulator of AGO2-miRNA complexes and cancer progression. CircAGO2 is up-regulated in gastric cancer, colon cancer, prostate cancer, and neuroblastoma, and is associated with poor prognosis of patients...
October 19, 2018: Cell Death and Differentiation
W-B Nie, L-M Zhao, R Guo, M-X Wang, F-G Ye
OBJECTIVE: Recent evidence suggests that circular RNAs (circRNAs) play important roles in multiple diseases, including cancer. Circ-NT5C2 was reported to be up-regulated in osteosarcoma. However, the clinical significance of circ-NT5C2 remains largely unclear. The aim of the current study was to investigate the value of circ-NT5C2 for the prognosis of patients with osteosarcoma. PATIENTS AND METHODS: the expression of circ-NT5C2 in osteosarcoma tissues and corresponding normal tissues were explored by quantitative real-time polymerase chain reaction (qRT-PCR) experiments...
October 2018: European Review for Medical and Pharmacological Sciences
Zunqiang Yan, Tiantuan Jiang, Pengfei Wang, Xiaoyu Huang, Qiaoli Yang, Wenyang Sun, Shuangbao Gun
Clostridium perfringens type C is a pathogen that causes necrotizing enteritis (NE), which is an intestinal tract disease in piglets. The pathogenesis of C. perfringens type C-induced NE is still unclear, leading to a lack of effective therapies. Earlier studies have reported that circular RNAs (circRNAs) are involved in the pathogenic processes of various diseases. However, it is not known if circRNAs in spleen play a role in C. perfringens type C infection in NE. To address this question, we infected 7-day-old piglets with C...
October 2018: FEBS Open Bio
Hui Liu, Yuan Liu, Zhaolian Bian, Jing Zhang, Rui Zhang, Xiaoyu Chen, Yanxia Huang, Yang Wang, Jinshui Zhu
BACKGROUND: Circular RNAs (circRNAs) are a new type of non-coding RNAs and their functions in gastric cancer (GC) remain unclear. Recent studies have revealed that circRNAs play an important role in cancer development and certain types of pathological responses, acting as microRNA (miRNA) sponges to regulate gene expression. METHODS: CircNet was used to screen potential circRNAs and validated circYAP1 expression levels in 17 GC tissues by quantitative real-time PCR (qRT-PCR) and another 80 paired GC tissues by FISH...
October 18, 2018: Molecular Cancer
Xi Liu, John M Abraham, Yulan Cheng, Zhixiong Wang, Zhe Wang, Guanjun Zhang, Hassan Ashktorab, Duane T Smoot, Robert N Cole, Tatiana N Boronina, Lauren R DeVine, C Conover Talbot, Zhengwen Liu, Stephen J Meltzer
MicroRNA (miR) sponges containing miR binding sequences constitute a potentially powerful molecular therapeutic strategy. Recently, naturally occurring circular RNAs (circRNAs) were shown to function as efficient miR sponges in cancer cells. We hypothesized that synthetic circRNA sponges could achieve therapeutic loss-of-function targeted against specific miRs. Linear RNA molecules containing miR-21 binding sites were transcribed in vitro; after dephosphorylation and phosphorylation, circularization was achieved using 5'-3' end-ligation by T4 RNA ligase 1...
September 22, 2018: Molecular Therapy. Nucleic Acids
Houyu Ju, Liming Zhang, Lu Mao, Shuli Liu, Weiya Xia, Jingzhou Hu, Min Ruan, Guoxin Ren
Circular RNAs (circRNAs) are known to be associated with carcinogenesis, and can serve as potential biomarkers for cancer diagnosis and therapeutic implications. However, little is known about their expression patterns in oral mucosal melanoma (OMM), an extremely rare cancer that is distinct from cutaneous melanoma for its clinical course and prognosis. To investigate circRNAs expression profile in OMM, we performed a circRNAs microarray to analyze 6 primary OMM samples with lymph nodes dissemination, and constructed a genome-wide circRNA profile...
2018: American Journal of Cancer Research
Zheying Zhang, Na Song, Yongxia Wang, Jiateng Zhong, Tengteng Gu, Liping Yang, Xianfeng Shen, Yuelin Li, Xin Yang, Xiangyu Liu, Rui Yang, Haijun Wang
Circular RNAs (circRNAs) play an important regulatory role in tumorigenesis. The aim of the present study was to analyze the circRNA expression network and elucidate its potential implications in colorectal cancer (CRC). The circRNA expression profile was analyzed in CRC tissues by RNA sequencing, and the functions of differentially expressed genes were analyzed by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis. The circRNA network was predicted with bioinformatics. On the basis of the results, we identified 23 differentially expressed circRNAs in CRC; GO and KEGG analyses demonstrated that the changes in circRNAs were mainly associated with regulation of biological and metabolic processes through binding to other molecules...
October 15, 2018: Journal of Cellular Biochemistry
Min Li, Jian Wang, Dewu Liu, Heping Huang
Growing evidence suggests that long noncoding RNAs (lncRNAs) and circular RNAs (circRNAs) are involved in the occurrence and development of tumors and fibrotic diseases. However, the integrated analysis of lncRNA and circRNA expression, alongside associated co‑expression and competing endogenous RNA (ceRNA) networks, has not yet been performed in human hypertrophic scars (HS). The present study compared the expression levels of lncRNAs, circRNAs and mRNAs in human HS and normal skin tissues by high‑throughput RNA sequencing...
October 15, 2018: Molecular Medicine Reports
Changlong Song, Dianqiu Li, Hongyu Liu, Hongyan Sun, Zhen Liu, Lirong Zhang, Yu Hu
Emerging evidence have discovered that circular RNAs (circRNAs) may serve as diagnostic or tumor promising biomarkers. This study aimed to investigate how circular RNA ADAMTS14 (circADAMTS14) regulates microRNA-572/ regulator of calcineurin 1(miR-572/ RCAN1) in hepatocellular carcinoma (HCC). The expression profiles of circRNA/microRNA (mRNA) between HCC tissues and paired adjacent tissues were analyzed via microarray analysis. The expressions of circADAMTS14, miR-572, and RCAN1 were measured by real-time polymerase chain reaction (PCR)...
October 14, 2018: Journal of Cellular Physiology
Wen-Jie Huang, Yunchao Wang, Songsong Liu, Jiali Yang, Shi-Xiang Guo, Lijiang Wang, Huaizhi Wang, Ying-Fang Fan
No abstract text is available yet for this article.
December 1, 2018: Cancer Letters
Shengting Wang, Qian Li, Yufang Wang, Xiaoming Li, Rui Wang, Yuhua Kang, Xukai Xue, Rui Meng, Qi Wei, Xinghua Feng
Recently, a large number of studies have shown that circular RNA (circRNA) is involved in the development and progression of human cancer. However, its role in triple-negative breast cancer (TNBC) remains largely unknown. In this study, a novel circRNA, circ-UBAP2 (hsa_circ_0001846), was shown to be markedly upregulated in TNBC. Moreover, high circ-UBAP2 expression was closely associated with larger tumour size (p = 0.003), advanced TNM stage (p = 0.005), lymph node metastasis (p = 0.002), and unfavourable prognosis (p = 0...
October 9, 2018: Biochemical and Biophysical Research Communications
Xuelian Ma, Xiaomin Zhao, Zhichao Zhang, Jianxiong Guo, Lijuan Guan, Juejun Li, Mi Mi, Yong Huang, Dewen Tong
BACKGROUND: Transmissible gastroenteritis virus (TGEV) infection can activate NF-κB pathway in porcine intestinal epithelial cells and result in severe inflammation. Non-coding RNAs (ncRNAs) are not translated into proteins and play an important role in many biological and pathological processes such as inflammation, viral infection, and mitochondrial damage. However, whether ncRNAs participate in TGEV-induced inflammation in porcine intestinal epithelial cells is largely unknown. RESULTS: In this study, the next-generation sequencing (NGS) technology was used to analyze the profiles of mRNAs, miRNAs, and circRNAs in Mock- and TGEV-infected intestinal porcine epithelial cell-jejunum 2 (IPEC-J2) cell line...
October 12, 2018: BMC Genomics
Hongwei Liu, Dongliang Chen, Junming Bi, Jinli Han, Meihua Yang, Wei Dong, Tianxin Lin, Jian Huang
Circular RNAs (circRNAs) have recently been confirmed to participate in different pathological processes, including cancer progression. However, the role and precise mechanism of action of the majority of circRNAs have not been elucidated in bladder cancer (BC). Here, we identified a novel circular RNA, termed circUBXN7, which was significantly downregulated in BC tissues compared with matched nontumor tissues. Importantly, we found that decreased circUBXN7 expression was associated with pathological stage, grade and poor prognosis of BC patients...
October 12, 2018: Aging
Jia-Ying Xu, Neng-Bin Chang, Zhi-Hua Rong, Tao Li, Ling Xiao, Qing-Ping Yao, Rui Jiang, Jun Jiang
Intimal hyperplasia is a reaction to vascular injury, which is the primary reason for vascular restenosis caused by the diagnostic or therapeutic procedure for cardiovascular diseases. Circular RNAs (circRNAs) are known to be associated with several cardiovascular conditions, but the expression of circRNAs in the neointima has not been reported in detail. In this study, we established the balloon-injured rat carotid artery model and detected the expression of circRNAs in the carotid arteries with a microarray...
October 11, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
Xin Chen, Rixin Chen, Wen-Su Wei, Yonghong Li, Zi-Hao Feng, Lei Tan, Jie-Wei Chen, Gangjun Yuan, Siliang Chen, Shen-Jie Guo, Kanghua Xiao, Zhuo-Wei Liu, Jun Hang Luo, Fang-Jian Zhou, Dan Xie
PURPOSE: Circular RNAs (circRNAs), a novel class of non-coding RNAs, have recently been drawn lots of attention in the pathogenesis of human cancers. However, the role of circRNAs in cancer cells epithelial-mesenchymal transition (EMT) remains unclear. In this study, we aimed to identify novel circRNAs that regulates urothelial carcinoma of the bladder (UCB) cells EMT and explored their regulatory mechanisms and clinical significance in UCBs. EXPERIMENTAL DESIGN: We first screened circRNA expression profiles using a circRNA microarray in paired UCB and normal tissues, and then studied the clinical significance of an up-regulated circRNA, circPRMT5, in a large cohort of UCB patients...
October 10, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Gerhard Steger, Detlev Riesner
Viroids were described 47 years ago as the smallest RNA molecules capable of infecting plants and autonomously self-replicating without an encoded protein. Work on viroids initiated the development of a number of innovative methods. Novel chromatographic and gelelectrophoretic methods were developed for the purification and characterization of viroids; these methods were later used in molecular biology, gene technology and in prion research. Theoretical and experimental studies of RNA folding demonstrated the general biological importance of metastable structures, and nuclear magnetic resonance spectroscopy of viroid RNA showed the partially covalent nature of hydrogen bonds in biological macromolecules...
October 10, 2018: Nucleic Acids Research
Fengqian Shen, Peijie Liu, Ning Li, Zhenying Yi, Xiaojing Tie, Yan Zhang, Ling Gao, Zhiqiao Xu
Gastric cancer severely threatens human life, while its pathogenesis is still unclear. The present study was to explore the potential pathogenic mechanism underlying gastric cancer. Real-time PCR was performed to detect the expression of circRNA_001569 and miR-145; western blot was performed to detect the expression of NR4A2. Cell cycle and apoptosis was determined using flow cytometry, and cell viability was determined using Cell counting kit-8 (CCK-8) assay. Luciferase reporter assay was carried out to validate the relationship between miR-145 and NR4A2...
October 9, 2018: Journal of Biochemistry
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