151
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Zhou L, Li Y, Jiang W, Zhang H, Wen Z, Su Y, Wu F, Zhi Z, Shen Q, Li H, Xu X, Tang W. Down-regulation of circ-PRKCI inhibits cell migration and proliferation in Hirschsprung disease by suppressing the expression of miR-1324 target PLCB1. Cell Cycle 2018; 17:1092-1101. [PMID: 29895226 DOI: 10.1080/15384101.2018.1480210] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Circular RNAs (circRNAs) are a novel class of noncoding RNAs (ncRNAs), which have been shown to participate in intracellular RNA regulatory networks and play vital roles in many pathological processes. Recently, circular RNA_PRKCI (circ-PRKCI) has been reported to regulate cell proliferation, migration and invasion in several human cancers. Hirschsprung disease (HSCR) is a well-known congenital gut motility disorder which roots in the aberrance of cranial-caudal neural crest cell migration. In this study, we investigated whether circ-PRKCI may affect cell migration and proliferation in HSCR. Quantitative reverse transcription PCR (qRT-PCR) was performed to detect the expression of circ-PRKCI in 48 HSCR aganglionic tissues and 48 normal bowel tissues. Luciferase reporter assay and RNA immunoprecipitation (RIP) assay verified the direct interaction between miR-1324 and PLCB1 or circ-PRKCI. Cell counting Kit-8 (CCK-8) and Ethynyldeoxyuridine (EdU) assays were employed to appraise the effects of miR-1324 or circ-PRKCI on cell proliferative potential, while transwell was performed to detect the migration in vitro. We found that circ-PRKCI was significantly down-regulated in HSCR aganglionic tissues. Morever, knockdown of circ-PRKCI suppressed cell proliferation and migration in vitro. Mechanistically, we confirmed that circ-PRKCI functioned as a molecular sponge for miR-1324 to upregulate the expression of PLCB1. In conclusion, our present study revealed the important role of circ-PRKCI-miR-1324-PLCB1 regulatory network in HSCR, providing a novel insight for the pathogenesis of HSCR.
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Affiliation(s)
- Lingling Zhou
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Yang Li
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Weiwei Jiang
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Hua Zhang
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Zechao Wen
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Yang Su
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Feng Wu
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Zhengke Zhi
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Qiyang Shen
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Hongxing Li
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Xiaoqun Xu
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
| | - Weibing Tang
- a Department of Pediatric Surgery , Children's Hospital of Nanjing Medical University , Nanjing , China.,b State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health , Nanjing Medical University , Nanjing , China
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152
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Fu L, Jiang Z, Li T, Hu Y, Guo J. Circular RNAs in hepatocellular carcinoma: Functions and implications. Cancer Med 2018; 7:3101-3109. [PMID: 29856133 PMCID: PMC6051148 DOI: 10.1002/cam4.1574] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/16/2018] [Accepted: 05/01/2018] [Indexed: 12/13/2022] Open
Abstract
At present, as hotspot members of the noncoding RNA network, circular RNAs (circRNAs) with distinct properties and diverse pathophysiological functions are being increasingly delineated. CircRNAs play roles at the epigenetic, transcriptional and posttranscriptional regulatory levels. Major studies have focused on their functions as efficient microRNA sponges. The validated number of endogenous circRNAs involved in hepatocellular carcinoma (HCC) continues to increase. Altered circRNA expression is associated with HCC occurrence, invasion, and metastasis. Moreover, the aberrant expression of circRNAs is also significantly related to HCC tumor stage, size, differentiation and metastasis. Because they are exceptionally stable, highly conserved and have tissue‐specific expression patterns, some circRNAs, including hsa_circ_0004018, hsa_circ_0003570, and hsa_circ_0005075, may be potential markers for the diagnosis of HCC. We herein summarize the current knowledge of HCC‐associated circRNAs and present their implications for carcinogenesis and their potential value as diagnostic and prognostic biomarkers. Finally, we discuss the future directions of studies on HCC‐associated circRNAs.
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Affiliation(s)
- Liyun Fu
- Department of Hepatology, Ningbo No. 2 Hospital, and the Affiliated Hospital, Medical School of Ningbo University, Ningbo, China.,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, China
| | - Zhenluo Jiang
- Department of Hepatology, Ningbo No. 2 Hospital, and the Affiliated Hospital, Medical School of Ningbo University, Ningbo, China.,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, China
| | - Tianwen Li
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, China
| | - Yaoren Hu
- Department of Hepatology, Ningbo No. 2 Hospital, and the Affiliated Hospital, Medical School of Ningbo University, Ningbo, China
| | - Junming Guo
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, China
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153
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Circular RNAs as novel biomarkers with regulatory potency in human diseases. Future Sci OA 2018; 4:FSO314. [PMID: 30112184 PMCID: PMC6088266 DOI: 10.4155/fsoa-2018-0036] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 05/08/2018] [Indexed: 12/12/2022] Open
Abstract
Circular RNAs (circRNAs) are a large class of noncoding RNAs characterized with closed loop structures without 3′ and 5′ polar ends. They can roughly be divided into exonic circRNAs, exon–intron circRNAs and circular intronic RNAs. CircRNAs are characterized with stability, prevalence, specificity and conservation, which arouse great interest in circRNAs as disease biomarkers. Their abilities to sponge to miRNAs, cis-regulate parent genes, bind to proteins and encode proteins endow circRNAs a critical role of regulation in eukaryotic cells. This concise review focuses on circRNAs as functional biomarkers and therapeutic targets in both tumor and nontumorous diseases. Although they were discovered in 1970s, circular RNAs (circRNAs) have attracted great interest only relatively recently. Instead of genome ‘junk matters’, circRNAs are now considered as promising biomarkers and treatment targets. CircRNAs are involved in numerous cancer-related and noncancer diseases, such as lung cancer, gastric cancer, cardiovascular diseases, diabetes mellitus and so on. This review outlines the classification, characterization and function of circRNAs, with a specific focus on recent studies concerning the role of circRNAs in human diseases.
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154
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Zhong L, Wang Y, Cheng Y, Wang W, Lu B, Zhu L, Ma Y. Circular RNA circC3P1 suppresses hepatocellular carcinoma growth and metastasis through miR-4641/PCK1 pathway. Biochem Biophys Res Commun 2018; 499:1044-1049. [PMID: 29608893 DOI: 10.1016/j.bbrc.2018.03.221] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 03/29/2018] [Indexed: 12/30/2022]
Abstract
In the recent years, increasing evidences identify circular RNAs (circRNAs) as a class of important regulators in various human cancers. Nevertheless, the functions and mechanisms of most circRNAs in cancer cells remain largely unknown. In this study, we found out a significantly downregulated circRNA circC3P1 in hepatocellular carcinoma (HCC) tissues compared to adjacent normal tissues. And our results indicated that circC3P1 expression level was negatively correlated with TNM stage, tumor size and vascular invasion in HCC. Moreover, we found that circC3P1 overexpression dramatically inhibited the proliferation, migration and invasion of HCC cells in vitro and in vivo. In terms of mechanism, we found that circC3P1 could promote PCK1 expression through sponging miR-4641 in HCC cells. We showed that miR-4641 expression was negatively correlated with that of either circC3P1 or PCK1 in HCC tissues. Finally, by functional experiments, we demonstrated that knockdown of PCK1 significantly attenuated the effects of circC3P1 overexpression on HCC cell proliferation, migration and invasion. In summary, our findings illustrated that circC3P1 acts as a tumor suppressor via enhancing PCK1 expression by sponging miR-4641 in HCC.
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Affiliation(s)
- Lihua Zhong
- Department of Infectious Disease, The Forth Hospital of Harbin Medical University, Harbin 150001, China
| | - Yuanyuan Wang
- Department of Infectious Disease, The Forth Hospital of Harbin Medical University, Harbin 150001, China
| | - Yu Cheng
- Department of Infectious Disease, The Forth Hospital of Harbin Medical University, Harbin 150001, China
| | - Wen Wang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Baoling Lu
- Department of Infectious Disease, The Forth Hospital of Harbin Medical University, Harbin 150001, China
| | - Liying Zhu
- Department of Infectious Disease, The Forth Hospital of Harbin Medical University, Harbin 150001, China.
| | - Yingji Ma
- Department of Infectious Disease, The Forth Hospital of Harbin Medical University, Harbin 150001, China.
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156
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Song M, Xia L, Sun M, Yang C, Wang F. Circular RNA in Liver: Health and Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1087:245-257. [PMID: 30259372 DOI: 10.1007/978-981-13-1426-1_20] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Circular RNA (circRNA) is an important class of noncoding RNA characterized by covalently closed continuous loop structures. In recent years, the various functions of circRNAs have been continuously documented, including effects on cell proliferation and apoptosis and nutrient metabolism. The liver is the largest solid organ in mammals, and it also performs many functions in the body, which is considered to be the busiest organ in the body. At the same time, the liver is vulnerable to multiple pathogenic factors, causing various acute and chronic liver diseases. The pathogenesis of liver disease is still not fully understood. As a rising star for the past few years, circRNAs have been proven involved in the regulation of liver homeostasis and disease. This chapter will explain the role of circRNAs in liver health and diseases and sort out the confusion in the present study.
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Affiliation(s)
- Meiyi Song
- Division of Gastroenterology and Hepatology, Digestive Disease Institute, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lu Xia
- Division of Gastroenterology and Hepatology, Digestive Disease Institute, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Mengxue Sun
- Division of Gastroenterology and Hepatology, Digestive Disease Institute, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Changqing Yang
- Division of Gastroenterology and Hepatology, Digestive Disease Institute, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Fei Wang
- Division of Gastroenterology and Hepatology, Digestive Disease Institute, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China.
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