101
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Liu J, Yang L, Fu Q, Liu S. Emerging Roles and Potential Biological Value of CircRNA in Osteosarcoma. Front Oncol 2020; 10:552236. [PMID: 33251132 PMCID: PMC7673402 DOI: 10.3389/fonc.2020.552236] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 09/21/2020] [Indexed: 12/20/2022] Open
Abstract
Circular RNAs (circRNAs) are endogenous noncoding RNAs that are widely found in eukaryotic cells. They have been found to play a vital biological role in the development of human diseases. At present, circRNAs have been involved in the pathogenesis, diagnosis, and targeted treatment of multiple tumors. This article reviews the research progress of circRNAs in osteosarcoma (OSA) in recent years. The potential connection between circRNAs and OSA cell proliferation, apoptosis, metastasis, and chemotherapy sensitivity or resistance, as well as clinical values, is described in this review. Their categories and functions are generally summarized to facilitate a better understanding of OSA pathogenesis, and findings suggest novel circRNA-based methods may be used to investigate OSA and provide an outlook for viable biomarkers and therapeutic targets.
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Affiliation(s)
- Jiamei Liu
- Department of Pathology, The Shengjing Hospital of China Medical University, Shenyang, China
| | - Liyu Yang
- Department of Orthopedics, The Shengjing Hospital of China Medical University, Shenyang, China
| | - Qin Fu
- Department of Orthopedics, The Shengjing Hospital of China Medical University, Shenyang, China
| | - Shengye Liu
- Department of Orthopedics, The Shengjing Hospital of China Medical University, Shenyang, China
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102
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Zhou Z, Ma J, Lu J, Chen A, Zhu L. Circular RNA CircCDH13 contributes to the pathogenesis of osteoarthritis via CircCDH13/miR-296-3p/PTEN axis. J Cell Physiol 2020; 236:3521-3535. [PMID: 33037617 DOI: 10.1002/jcp.30091] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/17/2020] [Accepted: 09/19/2020] [Indexed: 12/13/2022]
Abstract
Circular RNAs (circRNAs) are involved in a variety of human diseases; however, the function of circRNAs in osteoarthritis (OA) remains largely unknown. In this study, we investigated the role of CircCDH13 in OA and its underlying mechanisms. CircRNA expression profiles in OA and normal cartilage tissues were detected by microarray. The expression pattern, functional role, and mechanisms of CircCDH13 in OA were studied in vitro and in vivo. Gain-of-function and loss-of-function approaches were used to demonstrate the participation of CircCDH13 in OA. The regulatory relationship between CircCDH13 and miR-296-3p and miR-296-3p and phosphatase and tensin homolog (PTEN) was predicted by bioinformatics and verified by RNA pulldown and luciferase assay. Adeno-associated virus was also used to reveal the role and mechanisms of CircCDH13 in destabilization of medial meniscus (DMM)-induced OA mice. The upregulation of CircCDH13 in OA cartilage tissues significantly induces chondrocyte apoptosis, promotes extracellular matrix (ECM) catabolism, and inhibits ECM anabolism. Mechanistically, CircCDH13 contributes to OA pathogenesis by functioning as a sponge of miR-296-3p and regulating the miR-296-3p-PTEN pathway. Silencing of CircCDH13 in vivo markedly alleviated DMM-induced OA in mice. Our study revealed an important role of CircCDH13 in OA pathogenesis. Silencing of CircCDH13 could reduce chondrocyte apoptosis, inhibit ECM catabolism, and promote ECM anabolism through the miR-296-3p-PTEN pathway. It provides a potential target for developing effective interventions in treating OA.
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Affiliation(s)
- Zhibin Zhou
- Department of Orthopaedics, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Jun Ma
- Department of Orthopaedics, Changzheng Hospital, Navy Medical University, Shanghai, China
| | - Jiajia Lu
- Department of Orthopaedics, Changzheng Hospital, Navy Medical University, Shanghai, China
| | - Aimin Chen
- Department of Orthopaedics, Changzheng Hospital, Navy Medical University, Shanghai, China
| | - Lei Zhu
- Department of Orthopaedics, Changzheng Hospital, Navy Medical University, Shanghai, China
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103
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Cai Z, Li H. Circular RNAs and Bladder Cancer. Onco Targets Ther 2020; 13:9573-9586. [PMID: 33061440 PMCID: PMC7535116 DOI: 10.2147/ott.s268859] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/03/2020] [Indexed: 12/17/2022] Open
Abstract
Bladder cancer (BC) is the most common urinary system malignancy and is a serious threat to human health. Circular RNAs (circRNAs) are members of a newly defined class of noncoding RNAs (ncRNAs) that can regulate gene expression at the transcriptional or posttranscriptional level. Studies have shown that circRNAs are related to the clinicopathological characteristics, prognosis, and chemosensitivity of BC, and basic research has further confirmed that changes in the expression of circRNAs in BC are closely related to various tumor biological functions. CircRNAs promote tumor development by interacting with miRNAs to regulate transcription factors and both classical and nonclassical tumor signaling pathways. The nonclassical signaling pathways are related to cell cycle progression, epithelial–mesenchymal transition (EMT), extracellular matrix maintenance, and tumor stem cell maintenance. In this article, the relationships between circRNAs and the clinical characteristics of BC are reviewed, and the molecular mechanisms by which circRNAs promote tumor development are explored.
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Affiliation(s)
- Zhonglin Cai
- Department of Urology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, People's Republic of China
| | - Hongjun Li
- Department of Urology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, People's Republic of China
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104
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Shao Y, Lu B. The crosstalk between circular RNAs and the tumor microenvironment in cancer metastasis. Cancer Cell Int 2020; 20:448. [PMID: 32943996 PMCID: PMC7488731 DOI: 10.1186/s12935-020-01532-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/01/2020] [Indexed: 02/06/2023] Open
Abstract
Background Carcinomas are highly heterogeneous with regard to various cancer cells within a tumor microenvironment (TME), which is composed of stromal cells, blood vessels, immunocytes, and modified extracellular matrix. Focus of the study Circular RNAs (circRNAs) are non-coding RNAs that are expressed in cancer and stromal cells. They are closely associated with cancer metastasis as their expression in tumor cells directs the latter to migrate to different organs. circRNAs packaged in exosomes might be involved in this process. This is particularly important as the TME acts in tandem with cancer cells to enhance their proliferation and metastatic capability. In this review, we focus on recent studies on the crosstalk between circRNAs and the TME during cancer metastasis. Conclusion We particularly emphasize the roles of the interaction between circRNAs and the TME in anoikis resistance, vessel co-option, and local circRNA expression in directing homing of exosome.
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Affiliation(s)
- Ying Shao
- Department of Surgical Pathology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang China
| | - Bingjian Lu
- Department of Surgical Pathology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang China
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105
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Liu Z, Wang Q, Wang X, Xu Z, Wei X, Li J. Circular RNA cIARS regulates ferroptosis in HCC cells through interacting with RNA binding protein ALKBH5. Cell Death Discov 2020; 6:72. [PMID: 32802409 PMCID: PMC7414223 DOI: 10.1038/s41420-020-00306-x] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 07/07/2020] [Accepted: 07/22/2020] [Indexed: 02/07/2023] Open
Abstract
Circular RNAs (circRNAs) are a novel and unique class of noncoding RNAs that are back-spliced from pre-mRNAs. It has been confirmed that circRNAs are involved in various malignant behaviors of hepatocellular carcinoma (HCC). However, the role of circRNA in the regulation of ferroptosis and the underlying mechanism remain unknown. Here, cIARS (hsa_circ_0008367) was found to be the most highly expressed circRNA after sorafenib (SF) treatment in HCC cells. Small interfering RNA against cIARS (si-cIARS) significantly suppressed the cellular sensitivity to SF or Erastin through inactivating ferroptosis, which may be partially attributed to the inhibition of autophagy and ferritinophagy. Prediction analysis and mechanistic identification revealed that cIARS physically interacted with RNA binding protein (RBP) ALKBH5, which was a negative regulator of autophagic flux in HCC. The dissociation of BCL-2/BECN1 complex, mediated by ALKBH5 silencing was effectively blocked by si-cIARS. Furthermore, the inhibition of ferroptotic events, autophagic flux and ferritinophagy resulted from si-cIARS, were significantly rescued by ALKBH5 downregulation. Overall, cIARS may be an important circRNA, positively regulating SF-induced ferroptosis through suppressing the ALKBH5-mediated autophagy inhibition.
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Affiliation(s)
- Zhiqian Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Shandong First Medical University, 250014 Jinan, Shandong China
- Department of Hepatobiliary Surgery, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014 Jinan, Shandong China
| | - Qi Wang
- Department of Hepatobiliary Surgery, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014 Jinan, Shandong China
| | - Xin Wang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Shandong First Medical University, 250014 Jinan, Shandong China
| | - Zongzhen Xu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Shandong First Medical University, 250014 Jinan, Shandong China
| | - Xiaoqing Wei
- Department of Reproduction Medicine, Jinan Maternal and Child Health Care Hospital Affiliated to Shandong First Medical University, 250001 Jinan, Shandong China
| | - Jie Li
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Shandong First Medical University, 250014 Jinan, Shandong China
- Department of Hepatobiliary Surgery, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014 Jinan, Shandong China
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106
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Ashrafizadeh M, Hushmandi K, Hashemi M, Akbari ME, Kubatka P, Raei M, Koklesova L, Shahinozzaman M, Mohammadinejad R, Najafi M, Sethi G, Kumar AP, Zarrabi A. Role of microRNA/Epithelial-to-Mesenchymal Transition Axis in the Metastasis of Bladder Cancer. Biomolecules 2020; 10:E1159. [PMID: 32784711 PMCID: PMC7464913 DOI: 10.3390/biom10081159] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/03/2020] [Accepted: 08/05/2020] [Indexed: 12/12/2022] Open
Abstract
Bladder cancer (BC) is the 11th most common diagnosed cancer, and a number of factors including environmental and genetic ones participate in BC development. Metastasis of BC cells into neighboring and distant tissues significantly reduces overall survival of patients with this life-threatening disorder. Recently, studies have focused on revealing molecular pathways involved in metastasis of BC cells, and in this review, we focus on microRNAs (miRNAs) and their regulatory effect on epithelial-to-mesenchymal transition (EMT) mechanisms that can regulate metastasis. EMT is a vital process for migration of BC cells, and inhibition of this mechanism restricts invasion of BC cells. MiRNAs are endogenous non-coding RNAs with 19-24 nucleotides capable of regulating different cellular events, and EMT is one of them. In BC cells, miRNAs are able to both induce and/or inhibit EMT. For regulation of EMT, miRNAs affect different molecular pathways such as transforming growth factor-beta (TGF-β), Snail, Slug, ZEB1/2, CD44, NSBP1, which are, discussed in detail this review. Besides, miRNA/EMT axis can also be regulated by upstream mediators such as lncRNAs, circRNAs and targeted by diverse anti-tumor agents. These topics are also discussed here to reveal diverse molecular pathways involved in migration of BC cells and strategies to target them to develop effective therapeutics.
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Affiliation(s)
- Milad Ashrafizadeh
- Department of Basic Science, Faculty of Veterinary Medicine, University of Tabriz, Tabriz 5166616471, Iran;
| | - Kiavash Hushmandi
- Department of Food Hygiene and Quality Control, Division of Epidemiology & Zoonoses, Faculty of Veterinary Medicine, University of Tehran, Tehran 1419963114, Iran;
| | - Mehrdad Hashemi
- Department of Genetics, Faculty of advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran 1916893813, Iran;
| | - Mohammad Esmaeil Akbari
- Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran 1989934148, Iran;
| | - Peter Kubatka
- Department of Medical Biology and Division of Oncology—Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovakia;
| | - Mehdi Raei
- Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran;
| | - Lenka Koklesova
- Department of Obstetrics and Gynecology, Martin University Hospital and Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia;
| | - Md Shahinozzaman
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA;
| | - Reza Mohammadinejad
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman 55877577, Iran;
| | - Masoud Najafi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah 6715847141, Iran;
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore;
| | - Alan Prem Kumar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore;
- Cancer Science Institute of Singapore, Centre for Translational Medicine, 14 Medical Drive, #11-01M, Singapore 117599, Singapore
| | - Ali Zarrabi
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, Istanbul 34956, Turkey
- Center of Excellence for Functional Surfaces and Interfaces (EFSUN), Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
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107
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Ma S, Kong S, Wang F, Ju S. CircRNAs: biogenesis, functions, and role in drug-resistant Tumours. Mol Cancer 2020; 19:119. [PMID: 32758239 PMCID: PMC7409473 DOI: 10.1186/s12943-020-01231-4] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 07/03/2020] [Indexed: 12/13/2022] Open
Abstract
Targeted treatment, which can specifically kill tumour cells without affecting normal cells, is a new approach for tumour therapy. However, tumour cells tend to acquire resistance to targeted drugs during treatment. Circular RNAs (circRNAs) are single-stranded RNA molecules with unique structures and important functions. With the development of RNA sequencing technology, circRNAs have been found to be widespread in tumour-resistant cells and to play important regulatory roles. In this review, we present the latest advances in circRNA research and summarize the various mechanisms underlying their regulation. Moreover, we review the role of circRNAs in the chemotherapeutic resistance of tumours and explore the clinical value of circRNA regulation in treating tumour resistance.
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Affiliation(s)
- Shuo Ma
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,School of Public Health, Nantong University, NO. 9, Seyuan Road, Nantong, 226019, Jiangsu, China
| | - Shan Kong
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,School of Public Health, Nantong University, NO. 9, Seyuan Road, Nantong, 226019, Jiangsu, China
| | - Feng Wang
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.
| | - Shaoqing Ju
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China. .,School of Public Health, Nantong University, NO. 9, Seyuan Road, Nantong, 226019, Jiangsu, China.
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108
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Yuan C, Luo X, Zhan X, Zeng H, Duan S. EMT related circular RNA expression profiles identify circSCYL2 as a novel molecule in breast tumor metastasis. Int J Mol Med 2020; 45:1697-1710. [PMID: 32236616 PMCID: PMC7169655 DOI: 10.3892/ijmm.2020.4550] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/14/2020] [Indexed: 12/11/2022] Open
Abstract
Substantial evidence indicates that circular RNAs (circRNAs) play vital roles in several diseases, especially in cancer development. However, the functions of circRNAs in breast cancer metastasis remain to be investigated. This study aimed to identify the key circRNAs involved in epithelial mesenchymal transition (EMT) of breast cancer and evaluated their molecular function and roles in pathways that may be associated with tumor metastasis. An EMT model was constructed by treating breast cancer cells MCF‑7 and MDA‑MB‑231 with transforming growth factor‑β1. High‑throughput RNA sequencing was used to identify the differentially expressed circRNAs in EMT and blank groups of two cells, and reverse transcription‑quantitative PCR was used to validate the expression of circSCYL2 in human breast cancer tissues and cells. The effects of circSCYL2 on breast cancer cells were explored by transfecting with plasmids and the biological roles were assessed using transwell assays. EMT groups of breast cancer cells exhibited the characteristics of mesenchymal cells. Furthermore, the present study found that 7 circRNAs were significantly upregulated in both the MCF‑7 EMT and MDA‑MB‑231 EMT groups, while 16 circRNAs were significantly downregulated. The current study identified that circSCYL2 was downregulated in breast cancer tissues and cell lines, and that circSCYL2 overexpression inhibited cell migration and invasion. This study provides expression profiles of circRNAs in EMT groups of breast cancer cells. circSCYL2, which is downregulated in breast cancer tissues and cells, may play an important role in breast cancer EMT progression.
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Affiliation(s)
- Chunlei Yuan
- Department of Breast Surgery, The Second Affiliated Hospital of Nanchang University
| | - Xuliang Luo
- Medical College of Nanchang University, Nanchang, Jiangxi 330000
| | - Xiang Zhan
- Department of General Surgery, The People's Hospital of Le 'An County, Fuzhou, Jiangxi 344000, P.R. China
| | - Huihui Zeng
- Department of General Surgery, The People's Hospital of Le 'An County, Fuzhou, Jiangxi 344000, P.R. China
| | - Sijia Duan
- Department of Breast Surgery, The Second Affiliated Hospital of Nanchang University
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109
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Li C, Fu X, He H, Chen C, Wang Y, He L. The Biogenesis, Functions, and Roles of circRNAs in Bladder Cancer. Cancer Manag Res 2020; 12:3673-3689. [PMID: 32547204 PMCID: PMC7245432 DOI: 10.2147/cmar.s245233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 04/16/2020] [Indexed: 01/16/2023] Open
Abstract
Bladder cancer (BCa) is the 10th most prevalent malignancy worldwide and remains a crucial cause of cancer-related morbidity and mortality. Circular RNAs (circRNAs), a large class of endogenous non-coding RNAs, contain unique covalent closed structures and their biogenesis and turnover are regulated by multiple factors. Recently, multiple circRNAs have been found to serve as important factors in several biological processes such as tumorigenesis. An increasing amount of research discovered that circRNAs are dysregulated in multiple cancer tissues compared with matched normal tissues, especially in BCa, indicating that circRNAs can act as biomarkers for the diagnosis and prognosis of BCa. In this review, we focus on the biogenesis, properties, turnover, and functions of circRNAs, summarizing their potential functions and clinical implications in BCa.
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Affiliation(s)
- Changjiu Li
- Department of Urology, Affiliated Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Xian Fu
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Huadong He
- Department of Urology, Affiliated Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Chao Chen
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Yuyong Wang
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Lugeng He
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
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110
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Xue C, Cheng Y, Wu J, Ke K, Miao C, Chen E, Zhang L. Circular RNA CircPRMT5 Accelerates Proliferation and Invasion of Papillary Thyroid Cancer Through Regulation of miR-30c/E2F3 Axis. Cancer Manag Res 2020; 12:3285-3291. [PMID: 32494192 PMCID: PMC7231777 DOI: 10.2147/cmar.s249237] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/21/2020] [Indexed: 12/11/2022] Open
Abstract
Background The role of circular RNA (circRNA) in papillary thyroid cancer (PTC) is largely unknown. This study aims to determine the function and mechanism of circPRMT5 in the regulation of PTC development. Methods PTC tissues and cell lines were used to determine circPRMT5 expression via quantitative real-time polymerase chain reaction. Small interfering RNA (siRNA) was utilized to knock down circPRMT5. Proliferation was analyzed through CCK8 and colony formation assays. Transwell assay was performed to determine cell migration and invasion. Luciferase assay and RIP assay were carried out to analyze the interaction between circPRMT5 and miR-30c. Results CircPRMT5 expression was upregulated in PTC tissues and cell lines. And circPRMT5 level was positively linked with advanced stage and lymph node metastasis. CircPRMT5 knockdown inhibited proliferation, migration and invasion while inducing apoptosis. CircPRMT5 worked as a competing endogenous RNA for miR-30c. By inhibiting miR-30c, circPRMT5 promoted the expression of E2F3. Conclusion Our findings demonstrate that circPRMT5 acts as an oncogenic circRNA to promote PTC progression via regulating miR-30c/E2F3 axis.
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Affiliation(s)
- Cheng Xue
- Department of Endocrinology, Wenling First People's Hospital, Wenling 317500, People's Republic of China
| | - Yi Cheng
- Department of Endocrinology, Wenling First People's Hospital, Wenling 317500, People's Republic of China
| | - Jinyou Wu
- Department of Endocrinology, Wenling First People's Hospital, Wenling 317500, People's Republic of China
| | - Kongliang Ke
- Department of Anorectal Surgery, Ningbo Hangzhou Bay Hospital, Ningbo 315000, People's Republic of China
| | - Chundi Miao
- Department of Anorectal Surgery, Ningbo Hangzhou Bay Hospital, Ningbo 315000, People's Republic of China
| | - Enfu Chen
- Department of Endocrinology, Wenling First People's Hospital, Wenling 317500, People's Republic of China
| | - Luqing Zhang
- Department of Anorectal Surgery, Ningbo Hangzhou Bay Hospital, Ningbo 315000, People's Republic of China
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