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Zhou W, Song W, Lu M. circ_0006789 promotes cervical cancer development via the miR-615-5p/HSF1 axis. Discov Oncol 2024; 15:165. [PMID: 38748048 PMCID: PMC11096288 DOI: 10.1007/s12672-024-01012-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/03/2024] [Indexed: 05/18/2024] Open
Abstract
OBJECTIVE Circular RNAs (circRNAs) are involved in the development of human cancers, including cervical cancer (CC). However, the role and mechanism of circ_0006789 (circSLC25A43) in CC are unclear. The purpose of this study was to investigate the functional role of circ_0006789 in CC. METHODS The expression of circ_0006789 in CC tissues and cell lines was examined by RT-qPCR. The characterization of circ_0006789 in CC cells was verified by subcellular localisation, actinomycin D assay, and RNase R assay. After circ_0006789 was knocked down in CC cell lines, the proliferation, apoptosis, migration and invasion of CC cells were assessed by CCK-8 method, flow cytometry, and Transwell assay. RIP assay, FISH assay, dual luciferase reporter gene assay and Western blot were used to investigate the regulatory mechanism between circ_0006789, miR-615-5p and heat shock factor 1 (HSF1). RESULTS circ_0006789 was upregulated in CC tissues and cell lines. CC cells were inhibited in their proliferation, migration, and invasion, as well as promoted to apoptosis when circ_0006789 was knocked down. It was found that circ_0006789 targeted miR-615-5p, and miR-615-5p expression was inversely correlated with circ_0006789 expression. Furthermore, HSF1 was a target gene of miR-615-5p. Furthermore, the suppressive effects on HeLa cells mediated by circ_0006789 knockdown were counter-balanced when miR-615-5p was knocked down and HSF1 was overexpressed. Mechanistically, circ_0006789 was found to promote CC development by reducing miR-615-5p and increasing HSF1 expressions. CONCLUSION circ_0006789 accelerates CC development via the miR-615-5p/HSF1 axis.
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Affiliation(s)
- Wenyu Zhou
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Harbin Medical University, No.199 Dazhi Street, Nangang District, Harbin, 150000, Heilongjiang, China
- Department of Gynaecology and Obstetrics, Shenzhen Pingshan District Maternal and Child Health Care Hospital, Shenzhen, 518100, Guangdong, China
| | - Weiwei Song
- Department of Gynaecology and Obstetrics, Shenzhen Pingshan District Maternal and Child Health Care Hospital, Shenzhen, 518100, Guangdong, China
| | - Meisong Lu
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Harbin Medical University, No.199 Dazhi Street, Nangang District, Harbin, 150000, Heilongjiang, China.
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2
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Hou C, Liu J, Liu J, Yao D, Liang F, Qin C, Ma Z. 5-methylcytosine-mediated upregulation of circular RNA 0102913 augments malignant properties of colorectal cancer cells through a microRNA-571/Rac family small GTPase 2 axis. Gene 2024; 901:148162. [PMID: 38224924 DOI: 10.1016/j.gene.2024.148162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/09/2024] [Accepted: 01/11/2024] [Indexed: 01/17/2024]
Abstract
Circular RNAs (circRNAs) are a class of stable non-coding RNAs that have emerged as key regulators in human diseases including cancer. This study investigates the role of circRNA_0102913 (circ_0102913) in malignant behavior of colorectal cancer (CRC) cells and the underpinning mechanisms. By analyzing CRC-related GSE197991, GSE159669, and GSE223001 datasets, we obtained circ_0102913 as an aberrantly upregulated circRNA in CRC. Increased circ_0102913 expression was detected in CRC tissues and cells. By querying multiple bioinformatics systems (circBank, Circular RNA Interactome, TargetScan, miRDIP, miRwalk, and miRDB), we identified microRNA-571 (miR-571) as a target of circ_0102913 and Rac family small GTPase 2 (RAC2) mRNA as a target of miR-571. Biotinylated-RNA pull-down and/or luciferase assays showed that circ_0102913 bound to miR-571 to restore the expression of RAC2 mRNA. Circ_0102913 silencing or miR-571 overexpression repressed proliferation, migration and invasion, and in vivo tumorigenesis abilities of CRC cells. However, the malignant properties of cells were restored by RAC2 overexpression. The increased circ_0102913 expression in CRC cells was attributed to increased 5-methylcytosine (m5C) modification levels. Silencing of NOP2/Sun RNA methyltransferase 5 reduced the m5C level and therefore reduced stability and expression of circ_0102913 expression in CRC cells. In conclusion, this study demonstrates that m5C-mediated upregulation of circ_0102913 augments malignant properties of CRC cells through a miR-571/RAC2 axis.
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Affiliation(s)
- Chaofeng Hou
- Department of Anorectal Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan, PR China
| | - Jinbo Liu
- Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, PR China
| | - Junwei Liu
- Department of Anorectal Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan, PR China
| | - Danjie Yao
- Department of Anorectal Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan, PR China
| | - Fang Liang
- Department of Oncology Rehabilitation, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan, PR China
| | - Congpeng Qin
- Department of Anorectal Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan, PR China
| | - Zhiyong Ma
- Department of Anorectal Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan, PR China.
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3
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Abdullah ST, Abdullah SR, Hussen BM, Younis YM, Rasul MF, Taheri M. Role of circular RNAs and gut microbiome in gastrointestinal cancers and therapeutic targets. Noncoding RNA Res 2024; 9:236-252. [PMID: 38192436 PMCID: PMC10771991 DOI: 10.1016/j.ncrna.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/10/2023] [Accepted: 12/11/2023] [Indexed: 01/10/2024] Open
Abstract
Gastrointestinal cancers are a huge worldwide health concern, which includes a wide variety of digestive tract cancers. Circular RNAs (circRNAs), a kind of non-coding RNA (ncRNAs), are a family of single-stranded, covalently closed RNAs that have become recognized as crucial gene expression regulators, having an impact on several cellular functions in cancer biology. The gut microbiome, which consists of several different bacteria, actively contributes to the regulation of host immunity, inflammation, and metabolism. CircRNAs and the gut microbiome interact significantly to greatly affect the growth of GI cancer. Several studies focus on the complex functions of circRNAs and the gut microbiota in GI cancers, including esophageal cancer, colorectal cancer, gastric cancer, hepatocellular cancer, and pancreatic cancer. It also emphasizes how changed circRNA expression profiles and gut microbiota affect pathways connected to malignancy as well as how circRNAs affect hallmarks of gastrointestinal cancers. Furthermore, circRNAs and gut microbiota have been recommended as biological markers for therapeutic targets as well as diagnostic and prognostic purposes. Targeting circRNAs and the gut microbiota for the treatment of gastrointestinal cancers is also being continued to study. Despite significant initiatives, the connection between circRNAs and the gut microbiota and the emergence of gastrointestinal cancers remains poorly understood. In this study, we will go over the most recent studies to emphasize the key roles of circRNAs and gut microbiota in gastrointestinal cancer progression and therapeutic options. In order to create effective therapies and plan for the future gastrointestinal therapy, it is important to comprehend the functions and mechanisms of circRNAs and the gut microbiota.
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Affiliation(s)
- Sara Tharwat Abdullah
- Department of Pharmacology and Toxicology, College of Pharmacy, Hawler Medical University, Erbil, Iraq
| | - Snur Rasool Abdullah
- Medical Laboratory Science, College of Health Sciences, Lebanese French University, Kurdistan Region, Erbil, Iraq
| | - Bashdar Mahmud Hussen
- Department of Biomedical Sciences, College of Science, Cihan University-Erbil, Kurdistan Region, 44001, Iraq
- Department of Clinical Analysis, College of Pharmacy, Hawler Medical University, Kurdistan Region, Erbil, Iraq
| | - Yousif Mohammed Younis
- Department of Nursing, College of Nursing, Lebanese French University, Kurdistan Region, Erbil, Iraq
| | - Mohammed Fatih Rasul
- Department of Pharmaceutical Basic Science, Faculty of Pharmacy, Tishk International University, Erbil, Kurdistan Region, Iraq
| | - Mohammad Taheri
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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4
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Chiang TW, Jhong SE, Chen YC, Chen CY, Wu WS, Chuang TJ. FL-circAS: an integrative resource and analysis for full-length sequences and alternative splicing of circular RNAs with nanopore sequencing. Nucleic Acids Res 2024; 52:D115-D123. [PMID: 37823705 PMCID: PMC10767854 DOI: 10.1093/nar/gkad829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/26/2023] [Accepted: 10/02/2023] [Indexed: 10/13/2023] Open
Abstract
Circular RNAs (circRNAs) are RNA molecules with a continuous loop structure characterized by back-splice junctions (BSJs). While analyses of short-read RNA sequencing have identified millions of BSJ events, it is inherently challenging to determine exact full-length sequences and alternatively spliced (AS) isoforms of circRNAs. Recent advances in nanopore long-read sequencing with circRNA enrichment bring an unprecedented opportunity for investigating the issues. Here, we developed FL-circAS (https://cosbi.ee.ncku.edu.tw/FL-circAS/), which collected such long-read sequencing data of 20 cell lines/tissues and thereby identified 884 636 BSJs with 1 853 692 full-length circRNA isoforms in human and 115 173 BSJs with 135 617 full-length circRNA isoforms in mouse. FL-circAS also provides multiple circRNA features. For circRNA expression, FL-circAS calculates expression levels for each circRNA isoform, cell line/tissue specificity at both the BSJ and isoform levels, and AS entropy for each BSJ across samples. For circRNA biogenesis, FL-circAS identifies reverse complementary sequences and RNA binding protein (RBP) binding sites residing in flanking sequences of BSJs. For functional patterns, FL-circAS identifies potential microRNA/RBP binding sites and several types of evidence for circRNA translation on each full-length circRNA isoform. FL-circAS provides user-friendly interfaces for browsing, searching, analyzing, and downloading data, serving as the first resource for discovering full-length circRNAs at the isoform level.
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Affiliation(s)
- Tai-Wei Chiang
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Song-En Jhong
- Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Chen Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Chia-Ying Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Wei-Sheng Wu
- Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan
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5
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Qian X, Chen C, Tong S, Zhang J. Circ_MACF1 targets miR-421 to upregulate FMO2 to suppress paclitaxel resistance and malignant cellular behaviors in lung adenocarcinoma. Thorac Cancer 2023; 14:3348-3357. [PMID: 37814902 PMCID: PMC10665787 DOI: 10.1111/1759-7714.15132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/11/2023] Open
Abstract
BACKGROUND Chemoresistance remains an enormous challenge in the treatment of lung adenocarcinoma (LADC). Circular RNAs (circRNAs) exhibit important regulation in tumor progression and chemoresistance. This research focused on exploring the regulatory function and mechanism of circ_MACF1 (has_circ_0011780) in paclitaxel (PTX) resistance in LADC. METHODS Circ_MACF1, miR-421 and flavin-containing monooxygenase 2 (FMO2) were determined by RT-qPCR. MTT was applied to detect IC50 of PTX. The proliferation analysis was performed using EdU and colony formation assay. Cell apoptosis and motility were examined using flow cytometry and transwell assay, respectively. Western blot was administered for protein detection. A dual-luciferase reporter assay was performed for confirming target interaction. PTX sensitivity in vivo was researched via xenograft tumor assay. RESULTS Expression of circ_MACF1 was decreased in PTX-resistant LADC tissues and cells. Circ_MACF1 overexpression reduced chemoresistance, proliferation, motility and accelerated apoptosis in PTX-resistant LADC cells. Circ_MACF1 targeted miR-421 and miR-421 upregulation reverted circ_MACF1-evoked effects. FMO2 served as a downstream target of miR-421 and circ_MACF1 sponged miR-421 to elevate the expression of FMO2. MiR-421 enhanced PTX resistance and LADC progression via targeting FMO2. FMO2 knockdown enhanced IC50 of PTX and cell proliferation. In vivo, circ_MACF1 elevated PTX sensitivity of LADC by mediating miR-421/FMO2 axis. CONCLUSION These findings elucidated that circ_MACF1 inhibited PTX resistance by absorbing miR-421 to upregulate FMO2 in LADC.
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Affiliation(s)
- Xiaoting Qian
- Department of Pharmacy, Chun'an First People's HospitalZhejiang Provincial People's Hospital (Chun'an Branch)ZhejiangChina
| | - Chunhua Chen
- Department of CardiologyChun'an First People's Hospital, Zhejiang Provincial People's Hospital (Chun'an Branch)ZhejiangChina
| | - Sanxiang Tong
- Department of Infectious DiseaseChun'an First People's Hospital, Zhejiang Provincial People's Hospital (Chun'an Branch)ZhejiangChina
| | - Jun Zhang
- Department of GastroenterologyZhejiang Provincial People's HospitalZhejiangChina
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6
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Yuan Q, Zhang Y, Li J, Zhang D, Yang W. Circ_TEX2 Functions as a Tumor Suppressor in Hepatoma via miR-96-5p/SPRED1 Axis. Mol Biotechnol 2023; 65:1679-1692. [PMID: 36745282 DOI: 10.1007/s12033-023-00669-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 01/14/2023] [Indexed: 02/07/2023]
Abstract
Circular RNAs (circRNAs) have been shown to have a vital effect on hepatoma progression. The purpose of this study was to explore the function and mechanism of circRNA testis expressed 2 (circ_TEX2, circ_0004913) in hepatoma pathogenesis. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to detect circ_TEX2, miR-96-5p, and sprouty-related EVH1 domain containing 1 (SPRED1) expression. Western blot analyzed the proliferating cell nuclear antigen (PCNA), SPRED1, and the apoptosis-related protein levels. 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT), 5-ethynyl-2'-deoxyuridine (EdU), and colony formation assays were used to test cell proliferation. Cell migration and invasion were analyzed by transwell assay, and cell apoptosis was detected by flow cytometry. Dual-luciferase reporter assay was done to analyze the target relationship between miR-96-5p and circ_TEX2 or SPRED1. The effects of circ_TEX2 on tumor growth in vivo were verified by xenograft model experiment and immunohistochemistry assay. The levels of circ_TEX2 and SPRED1 were down-regulated in hepatoma tissues and cells, and miR-96-5p expression was up-regulated. Overexpression of circ_TEX2 could inhibit the proliferation, migration, and invasion and boost cell apoptosis of hepatoma cells. Circ_TEX2 affected SPRED1 expression by sponging miR-96-5p. The overexpression of miR-96-5p could overturn the influence of circ_TEX2 up-regulation on malignant behaviors of hepatoma cells, and reduced SPRED1 expression could reverse the function of miR-96-5p knockdown on hepatoma cell malignant behaviors. Circ_TEX2 could suppress the growth of xenograft tumors in vivo. Our study demonstrates the tumor-suppressive role of circ_TEX2 in hepatoma through miR-96-5p/SPRED1 axis, suggesting that strategies directed toward restoring the production of circ_TEX2 might have a therapeutic value for hepatoma treatment.
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Affiliation(s)
- Qinggong Yuan
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157, Xiwu Road, Xincheng District, Xi'an, 710004, Shaanxi, China
| | - Yan Zhang
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157, Xiwu Road, Xincheng District, Xi'an, 710004, Shaanxi, China
| | - Junhui Li
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157, Xiwu Road, Xincheng District, Xi'an, 710004, Shaanxi, China
| | - Di Zhang
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157, Xiwu Road, Xincheng District, Xi'an, 710004, Shaanxi, China
| | - Wenbin Yang
- Department of General Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157, Xiwu Road, Xincheng District, Xi'an, 710004, Shaanxi, China.
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7
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Shree B, Sharma V. Role of Non-Coding RNAs in TGF-β Signalling in Glioma. Brain Sci 2023; 13:1376. [PMID: 37891744 PMCID: PMC10605910 DOI: 10.3390/brainsci13101376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
Brain tumours and Gliomas, in particular, are among the primary causes of cancer mortality worldwide. Glioma diagnosis and therapy have not significantly improved despite decades of efforts. Autocrine TGF-β signalling promotes glioma proliferation, invasion, epithelial-to-mesenchymal transition (EMT), and drug resistance. Non-coding RNAs such as miRNA, lncRNA, and circRNAs have emerged as critical transcriptional and post-transcriptional regulators of TGF-β pathway components in glioma. Here, we summarize the complex regulatory network among regulatory ncRNAs and TGF-β pathway during Glioma pathogenesis and discuss their role as potential therapeutic targets for Gliomas.
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Affiliation(s)
| | - Vivek Sharma
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Hyderabad 500078, India;
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8
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Davoodvandi A, Rafiyan M, Mansournia MA, Rajabpoor Nikoo N, Saati M, Samimi M, Asemi Z. MicroRNA and gynecological cancers: Focus on miR-195. Pathol Res Pract 2023; 249:154784. [PMID: 37639954 DOI: 10.1016/j.prp.2023.154784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 08/19/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023]
Abstract
Different cancer types have been shown to have down-regulated expression levels of miR-195 as an anti-tumor agent. MiR-195 family members can inhibit cancer cell proliferation, angiogenesis, epithelial-mesenchymal transition and metastases, immunosuppression, glycolysis, drug resistance, and cancer stem cell development by targeting the 3'-UTR of the mRNA of different pro-tumor genes. MiR-195 identified as a tumor suppressor miR in a variety of cancers, most notably gynecological malignancies such as cervical, endometrial, and ovarian carcinoma. As a result, restoring miR-195 expression should be regarded as a potential therapy for either prevention or treatment of gynecological cancers. This review will present the most recent data about miR-195-mediated anti-tumor effects in gynecological malignancies, emphasizing its downstream signaling pathways and target genes, as well as prospective treatment techniques.
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Affiliation(s)
- Amirhossein Davoodvandi
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Islamic Republic of Iran; Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran
| | - Mahdi Rafiyan
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran.
| | - Mohammad Ali Mansournia
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Nesa Rajabpoor Nikoo
- Department of Gynecology and Obstetrics, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.
| | - Maryam Saati
- Department of Nursing, Semnan Branch, Islamic Azad University, Semnan, Islamic Republic of Iran
| | - Mansooreh Samimi
- Department of Gynecology and Obstetrics, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran.
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran.
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Li Q, Ren X, Wang Y, Xin X. CircRNA: a rising star in leukemia. PeerJ 2023; 11:e15577. [PMID: 37431465 PMCID: PMC10329819 DOI: 10.7717/peerj.15577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 05/25/2023] [Indexed: 07/12/2023] Open
Abstract
Non-coding RNA are a class of RNA that lack the potential to encode proteins. CircRNAs, generated by a post-splicing mechanism, are a newly discovered type of non-coding RNA with multi-functional covalent loop structures. CircRNAs may play an important role in the occurrence and progression of tumors. Research has shown that circRNAs are aberrantly expressed in various types of human cancers, including leukemia. In this review, we summarize the expression and function of circRNAs and their impact on different types of leukemia. We also illustrate the function of circRNAs on immune modulation and chemoresistance in leukemia and their impact on its diagnosis and prognosis. Herein, we provide an understanding of recent advances in research that highlight the importance of circRNAs in proliferation, apoptosis, migration, and autophagy in different types of leukemia. Furthermore, circRNAs make an indispensable difference in the modulation of the immunity and chemoresistance of leukemia. Increasing evidence suggests that circRNAs may play a vital role in the diagnostic and prognostic markers of leukemia because of their prominent properties. More detailed preclinical studies on circRNAs are needed to explore effective ways in which they can serve as biomarkers for the diagnosis and prognosis of leukemia in vivo.
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Affiliation(s)
- Qianan Li
- College of Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Xinxin Ren
- College of Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Ying Wang
- College of Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Xiaoru Xin
- College of Life Sciences, Zhejiang Normal University, Jinhua, China
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10
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Zhou H, Huang J, Wang F. Increased transcription of hsa_circ_0000644 upon RUNX family transcription factor 3 downregulation participates in the malignant development of bladder cancer. Cell Signal 2023; 104:110590. [PMID: 36627006 DOI: 10.1016/j.cellsig.2023.110590] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/28/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
BACKGROUND Studies are ongoing to examine the versatile functions of circular RNAs (circRNAs) in human diseases. This research investigates the effects of hsa_circ_0000644 (circ_644) and its related molecules on the malignant behavior of bladder cancer (BCa) cells. METHODS Abundant bioinformatics analyses were performed to screen the key circRNA and its related molecules in BCa. Tumor tissues and the para-tumorous tissues were collected from 58 patients with BCa. Expression of RUNX family transcription factor 3 (RUNX3), circ_644, microRNA-143-3p (miR-143-3p), and musashi RNA binding protein 2 (MSI2) in BCa tissues or cells was determined. Molecular interactions were confirmed by chromatin immunoprecipitation, RNA pull-down, and luciferase assays. Gain and loss-of function assays were performed using two BCa cell lines (T24 and HT1376). RESULTS Circ_644 was highly expressed whereas RUNX3, which could suppress circ_644 transcription, was lowly expressed in BCa tissues and cells. Upregulation of RUNX3 suppressed proliferation, colony formation, migration and invasion, and tumorigenicity of BCa cells and induced cell cycle arrest. However, the tumor-suppressive effects of RUNX3 were blocked by circ_644 upregulation. Circ_644 served as a sponge for miR-143-3p, and miR-143-3p bound to MSI2 mRNA. The rescue experiments showed that miR-143-3p inhibition or MSI2 overexpression restored the malignant behaviors of BCa cells induced by circ_644 knockdown or RUNX3 overexpression. CONCLUSION This study demonstrates that transcriptional activation of circ_644 upon RUNX3 downregulation drives the malignant development of BCa through the miR-143-3p/MSI2 axis. RUNX3 restoration or specific inhibition of circ_644 or MSI2 may help block BCa progression.
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Affiliation(s)
- Hao Zhou
- Department of Urology, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410001, Hunan, PR China
| | - Jiangbo Huang
- Department of Urology, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410001, Hunan, PR China
| | - Fang Wang
- Department of Medicine, Changsha Social Work College, Changsha 410004, Hunan, PR China.
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11
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Wang D, Guan H, Xia Y. YTHDC1 maintains trophoblasts function by promoting degradation of m6A-modified circMPP1. Biochem Pharmacol 2023; 210:115456. [PMID: 36780989 DOI: 10.1016/j.bcp.2023.115456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/13/2023]
Abstract
N6-methyladenosine (m6A) is the most abundant mRNA internal modification in eukaryotic mRNAs. This study focuses on the effect of circMPP1 on placental villi function and the molecular mechanism. First, differentially expressed circular RNAs (circRNAs) in placenta tissues of large-for-gestational-age(LGA) neonates were screened by m6A-circRNA Epitranscriptomic Microarray and bioinformatics analyses. The abnormal expression of circMPP1 in placental tissues and cell lines was validated by RT-qPCR. In-vitro and in-vivo functional experiments were performed to evaluate the role of circMPP1 in placental impairment and fetal dysplasia. The interacting proteins of circMPP1 were identified and validated using RNA pull-down, RNA immunoprecipitation, fluorescence in situ hybridization, and immunofluorescence experiments. Protein interactions and expression levels were detected by Co-immunoprecipitation and western blot analysis. The m6A modification in circMPP1 was verified by methylated RNA immunoprecipitation assay. Bioinformatics analyses showed that circMPP1 was highly expressed in tissues with disordered placental function. In-vitro and in-vivo functional experiments showed that circMPP1 inhibited the function of placental villi. Further mechanism analyses showed that circMPP1 activated the NF-kappa B and MAPK3 signaling pathways. In addition, the m6A "reader" protein YTHDC1 was found to reduce circMPP1 expression via m6A modification. In conclusion, this study demonstrates that YTHDC1 maintains trophoblasts function by promoting degradation of m6A-mediated circMPP1.
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Affiliation(s)
- Dan Wang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
| | - Hongbo Guan
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110001, Liaoning Province, China.
| | - Yajun Xia
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
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12
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Chuang TJ, Chiang TW, Chen CY. Assessing the impacts of various factors on circular RNA reliability. Life Sci Alliance 2023; 6:6/5/e202201793. [PMID: 36849251 PMCID: PMC9971162 DOI: 10.26508/lsa.202201793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 02/15/2023] [Accepted: 02/15/2023] [Indexed: 03/01/2023] Open
Abstract
Circular RNAs (circRNAs) are non-polyadenylated RNAs with a continuous loop structure characterized by a non-colinear back-splice junction (BSJ). Although millions of circRNA candidates have been identified, it remains a major challenge for determining circRNA reliability because of various types of false positives. Here, we systematically assess the impacts of numerous factors related to circRNA identification, conservation, biogenesis, and function on circRNA reliability by comparisons of circRNA expression from mock and the corresponding colinear/polyadenylated RNA-depleted datasets based on three different RNA treatment approaches. Eight important indicators of circRNA reliability are determined. The relative contribution to variability explained analyses reveal that the relative importance of these factors in affecting circRNA reliability in descending order is the conservation level of circRNA, full-length circular sequences, supporting BSJ read count, both BSJ donor and acceptor splice sites at the same colinear transcript isoforms, both BSJ donor and acceptor splice sites at the annotated exon boundaries, BSJs detected by multiple tools, supporting functional features, and both BSJ donor and acceptor splice sites undergoing alternative splicing. This study thus provides a useful guideline and an important resource for selecting high-confidence circRNAs for further investigations.
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Affiliation(s)
| | - Tai-Wei Chiang
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Chia-Ying Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
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13
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Kadkhoda S, Ghafouri-Fard S, Noorbakhsh F, Ravaei S, Darbeheshti F, Amoli MM, Taslimi R, Shakoori A. The importance of regulatory pathway mediated by Circ0001955 in colorectal cancer. Exp Mol Pathol 2022; 128:104819. [PMID: 35914612 DOI: 10.1016/j.yexmp.2022.104819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 04/10/2022] [Accepted: 07/22/2022] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Colorectal cancer (CRC) has become one of the most common cancers in recent years. Given the importance that non-coding RNAs have recently acquired in various diseases including cancers, we decided to design this study to evaluate the expression levels of circ0001955/miR-145-5p/ONECUT2 axis in CRC. METHODS After bioinformatics analysis of GEO datasets related to CRC, a putative circ0001955/ miR-145-5p/ ONECUT2 pathway was assumed. Then, the expression levels of these genes were measured in 50 CRC samples and adjacent tissues by qRT- PCR. Also, correlation coefficients, receiver operating characteristic (ROC) curves, and correlation between circ0001955 levels with clinicopathological parameters of patients were analyzed. RESULTS Circ0001955 and ONECUT2 were considerably up-regulated, while the expression level of miR-145-5p was decreased in CRC samples compared with adjacent tissues (p < 0.05). Moreover, statistically significant correlations were observed between expression levels of circ0001955, miR-145-5p, and ONECUT2. We did not find any significant correlation between circ0001955 expression and clinicopathological parameters. CONCLUSION Our study showed that circ0001955 is dysregulated in CRC. This finding can open a new window for researchers for a better understanding of the potential pathways involved in CRC pathogenesis and, consequently, to find new treatment pathways.
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Affiliation(s)
- Sepideh Kadkhoda
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudeh Ghafouri-Fard
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farshid Noorbakhsh
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Sima Ravaei
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh Darbeheshti
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Medical Genetics Network (MeGeNe), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Mahsa M Amoli
- Metabolic Disorders Research Center, Endocrinology and Metabolism Molecular -Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Taslimi
- Department of Gastroenterology, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran.
| | - Abbas Shakoori
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Medical Genetics, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran.
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14
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Luo R. CircRNA circ-MYBL2 absorbs precursor miR-92b in the nucleus to suppress its role in enhancing gastric cancer cell proliferation. Am J Med Sci 2022; 364:454-460. [PMID: 35644224 DOI: 10.1016/j.amjms.2022.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 03/05/2022] [Accepted: 05/09/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND MM-associated circular RNA (Circ-MYBL2), a circular RNA (circRNA), participates in cancer biology. However, its role in gastric cancer (GC) is unclear. In this study, circ-MYBL2 was predicted to interact with precursor microRNA-92b (miR-92b). We then analyzed the role of circ-MYBL2 in GC and explored its crosstalk with miR-92b. METHODS In this research Circ-MYBL2 and miR-92b (mature and precursor) accumulation was determined using reverse transcription polymerase chain reaction (RT-qPCR). The involvement of circ-MYBL2 in the maturation of miR-92b was analyzed using overexpression assays. The subcellular location of circ-MYBL2 was determined using nuclear fractionation assay. The binding of precursor miR-92b to circ-MYBL2 was analyzed through RNA-RNA pulldown assay. The role of circ-MYBL2 and miR-92b in GC cell proliferation was studied with BrdU assay. RESULTS We found that GC tissues exhibited increased mature miR-92b levels but decreased precursor miR-92b and circ-MYBL2 levels. Circ-MYBL2 was detected in both the nucleus and cytoplasm in GC cells, and it directly interacted with precursor miR-92b. Moreover, circ-MYBL2 overexpression increased precursor miR-92b expression and decreased mature miR-92b level. Furthermore, miR-92b (mature) increased GC cell proliferation, and circ-MYBL2 decreased GC cell proliferation and suppressed the effect of miR-92b on GC cell proliferation. CONCLUSIONS Circ-MYBL2 may absorb precursor miR-92b in the nucleus to suppress its role in promoting gastric cancer cell proliferation.
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Affiliation(s)
- Ruijie Luo
- Department of Critical Care Medicine, Chengdu Wenjiang District People's Hospital, Chengdu City, Sichuan, China.
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15
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Lai Q, Li W, Wang H, Xu S, Deng Z. Emerging role of circRNAs in cancer under hypoxia (Review). Oncol Lett 2022; 24:372. [PMID: 36238836 PMCID: PMC9494632 DOI: 10.3892/ol.2022.13492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022] Open
Abstract
Circular RNA (circRNA), a recently identified type of non-coding RNAs (ncRNAs), forms a covalently closed loop with neither a 5′ cap structure nor a 3′ polyadenylated tail. Due to their lack of free ends, circRNAs are not easily cleaved by RNase R, thus avoiding degradation and being more stable than linear RNAs. Recent studies have suggested that circRNAs play a crucial role in regulating gene expression by acting as microRNAs sponges, RNA binding protein sponges and translational regulators. Currently, circRNAs are hot research topics due to their close association with the development of cancer and other diseases. Hypoxia is the most common microenvironment during tumor growth, and hypoxia-inducible factors have different effects on tumor growth and influence important cancer characteristics, including cell proliferation, apoptosis, differentiation, vascularization/angiogenesis, genetic instability, tumor metabolism, tumor immune response, invasion and metastasis. The present review aimed to study the biogenesis and mechanisms of gene regulation of circRNAs in hypoxia, to summarize the latest studies on circRNAs as potential diagnostic and prognostic biomarkers in hypoxia, and to understand the role of circRNAs in the process of tumor drug resistance under hypoxia.
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Affiliation(s)
- Qun Lai
- Department of Hematology and Oncology, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - Wenqiang Li
- Department of Pulmonary and Critical Care Medicine, First People's Hospital of Zigong, Zigong, Sichuan 643000, P.R. China
| | - Hongping Wang
- Department of Neurosurgery, Tangshan Gongren Hospital of Hebei Medical University, Tangshan, Hebei 063000, P.R. China
| | - Siran Xu
- Department of Pulmonary and Critical Care Medicine, First People's Hospital of Zigong, Zigong, Sichuan 643000, P.R. China
| | - Zhiping Deng
- Department of Pulmonary and Critical Care Medicine, First People's Hospital of Zigong, Zigong, Sichuan 643000, P.R. China
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16
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Najafi S. The emerging roles and potential applications of circular RNAs in ovarian cancer: a comprehensive review. J Cancer Res Clin Oncol 2022; 149:2211-2234. [PMID: 36053324 DOI: 10.1007/s00432-022-04328-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/24/2022] [Indexed: 12/25/2022]
Abstract
Ovarian cancer (OC) is among the most common human malignancies and the first cause of deaths among gynecologic cancers. Early diagnosis can help improving prognosis in those patients, and accordingly exploring novel molecular mechanisms may lead to find therapeutic targets. Circular RNAs (circRNAs) comprise a group of non-coding RNAs in multicellular organisms, which are identified with characteristic circular structure. CircRNAs have been found with substantial functions in regulating gene expression through interacting with RNA-binding proteins, targeting microRNAs, and transcriptional regulation. They have been found to be involved in regulating several critical processes such as cell growth, and death, organ development, signal transduction, and tumorigenesis. Accordingly, circRNAs have been implicated in a number of human diseases including malignancies. They are particularly reported to contribute to several hallmarks of cancer leading to cancer development and progression, although a number also are described with tumor-suppressor function. In OC, circRNAs are linked to regulation of cell growth, invasiveness, metastasis, angiogenesis, and chemoresistance. Notably, clinical studies also have shown potentials in diagnosis, prediction of prognosis, and therapeutic targets for OC. In this review, I have an overview to the putative mechanisms, and functions of circRNAs in regulating OC pathogenesis in addition to their clinical potentials.
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Affiliation(s)
- Sajad Najafi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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17
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CircMAT2B Induced by TEAD1 Aggravates the Warburg Effect and Tumorigenesis of Oral Squamous Cell Carcinoma through the miR-942-5p/HSPD1 Axis. JOURNAL OF ONCOLOGY 2022; 2022:7574458. [PMID: 36016581 PMCID: PMC9398833 DOI: 10.1155/2022/7574458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 07/07/2022] [Indexed: 12/09/2022]
Abstract
Oral squamous cell carcinoma (OSCC) is one of the most lethal cancers worldwide. The high morbidity and mortality of OSCC are a great burden to global health-care systems. Therefore it is important to understand the underlying molecular mechanisms of OSCC initiation and progression. This study aimed to investigate the role of circMAT2B in OSCC progression and its molecular mechanisms. First, the expression and circularization of circMAT2B in OSCC cells were verified. Subsequently, knockdown of circMAT2B was shown to inhibit OSCC cell proliferation, migration, invasion, and the Warburg effect. Bioinformatics prediction, RNA-pull down, and luciferase reporter gene assays led to the identification of a novel TEAD1/circMAT2B/miR-942-5p/HSPD1 axis in OSCC progression. In conclusion, the novel TEAD1/circMAT2B/miR-942-5p/HSPD1 axis is a potential target for OSCC.
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18
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circRNA: A New Biomarker and Therapeutic Target for Esophageal Cancer. Biomedicines 2022; 10:biomedicines10071643. [PMID: 35884948 PMCID: PMC9313320 DOI: 10.3390/biomedicines10071643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 12/19/2022] Open
Abstract
Circular RNAs (circRNAs) comprise a large class of endogenous non-coding RNA with covalently closed loops and have independent functions as linear transcripts transcribed from identical genes. circRNAs are generated by a “back-splicing” process regulated by regulatory elements in cis and associating proteins in trans. Many studies have shown that circRNAs play important roles in multiple processes, including splicing, transcription, chromatin modification, miRNA sponges, and protein decoys. circRNAs are highly stable because of their closed ring structure, which prevents them from degradation by exonucleases, and are more abundant in terminally differentiated cells, such as brains. Recently, it was demonstrated that numerous circRNAs are differentially expressed in cancer cells, and their dysfunction is involved in tumorigenesis and metastasis. However, the crucial functions of these circRNAs and the dysregulation of circRNAs in cancer are still unknown. In this review, we summarize the recent reports on the biogenesis and biology of circRNAs and then catalog the advances in using circRNAs as biomarkers and therapeutic targets for cancer therapy, particularly esophageal cancer.
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19
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Asadi MR, Moslehian MS, Sabaie H, Sharifi-Bonab M, Hakimi P, Hussen BM, Taheri M, Rakhshan A, Rezazadeh M. CircRNA-Associated CeRNAs Regulatory Axes in Retinoblastoma: A Systematic Scoping Review. Front Oncol 2022; 12:910470. [PMID: 35865469 PMCID: PMC9294360 DOI: 10.3389/fonc.2022.910470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/10/2022] [Indexed: 12/04/2022] Open
Abstract
Retinoblastoma (RB) is one of the most common childhood cancers caused by RB gene mutations (tumor suppressor gene in various patients). A better understanding of molecular pathways and the development of new diagnostic approaches may lead to better treatment for RB patients. The number of studies on ceRNA axes is increasing, emphasizing the significance of these axes in RB. Circular RNAs (circRNAs) play a vital role in competing endogenous RNA (ceRNA) regulatory axes by sponging microRNAs and regulating gene expression. Because of the broadness of ceRNA interaction networks, they may assist in investigating treatment targets in RB. This study conducted a systematic scoping review to evaluate verified loops of ceRNA in RB, focusing on the ceRNA axis and its relationship to circRNAs. This scoping review was carried out using a six-step strategy and the Prisma guideline, and it involved systematically searching the publications of seven databases. Out of 363 records, sixteen articles were entirely consistent with the defined inclusion criteria and were summarized in the relevant table. The majority of the studies focused on the circRNAs circ_0000527, circ_0000034, and circTET1, with approximately two-fifths of the studies focusing on a single circRNA. Understanding the many features of this regulatory structure may help elucidate RB’s unknown causative factors and provide novel molecular potential therapeutic targets and medical fields.
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Affiliation(s)
- Mohammad Reza Asadi
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Marziyeh Sadat Moslehian
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hani Sabaie
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mirmohsen Sharifi-Bonab
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parvin Hakimi
- Woman’s Reproductive Health Research Center, Tabriz University of medical sciences, Tabriz, Iran
| | - Bashdar Mahmud Hussen
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Erbil, Iraq
- Center of Research and Strategic Studies, Lebanese French University, Erbil, Iraq
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
- *Correspondence: Mohammad Taheri, ; Azadeh Rakhshan, ; Maryam Rezazadeh,
| | - Azadeh Rakhshan
- Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- *Correspondence: Mohammad Taheri, ; Azadeh Rakhshan, ; Maryam Rezazadeh,
| | - Maryam Rezazadeh
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
- Woman’s Reproductive Health Research Center, Tabriz University of medical sciences, Tabriz, Iran
- *Correspondence: Mohammad Taheri, ; Azadeh Rakhshan, ; Maryam Rezazadeh,
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Guo L, Jia L, Luo L, Xu X, Xiang Y, Ren Y, Ren D, Shen L, Liang T. Critical Roles of Circular RNA in Tumor Metastasis via Acting as a Sponge of miRNA/isomiR. Int J Mol Sci 2022; 23:ijms23137024. [PMID: 35806027 PMCID: PMC9267010 DOI: 10.3390/ijms23137024] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 02/06/2023] Open
Abstract
Circular RNAs (circRNAs), a class of new endogenous non-coding RNAs (ncRNAs), are closely related to the carcinogenic process and play a critical role in tumor metastasis. CircRNAs can lay the foundation for tumor metastasis via promoting tumor angiogenesis, make tumor cells gain the ability of migration and invasion by regulating epithelial-mesenchymal transition (EMT), interact with immune cells, cytokines, chemokines, and other non-cellular components in the tumor microenvironment, damage the normal immune function or escape the immunosuppressive network, and further promote cell survival and metastasis. Herein, based on the characteristics and biological functions of circRNA, we elaborated on the effect of circRNA via circRNA-associated competing endogenous RNA (ceRNA) network by acting as miRNA/isomiR sponges on tumor angiogenesis, cancer cell migration and invasion, and interaction with the tumor microenvironment (TME), then explored the potential interactions across different RNAs, and finally discussed the potential clinical value and application as a promising biomarker. These results provide a theoretical basis for the further application of metastasis-related circRNAs in cancer treatment. In summary, we briefly summarize the diverse roles of a circRNA-associated ceRNA network in cancer metastasis and the potential clinical application, especially the interaction of circRNA and miRNA/isomiR, which may complicate the RNA regulatory network and which will contribute to a novel insight into circRNA in the future.
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Affiliation(s)
- Li Guo
- Smart Health Big Data Analysis and Location Services Engineering Laboratory of Jiangsu Province, Department of Bioinformatics, School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (L.G.); (Y.X.); (Y.R.); (D.R.)
| | - Lin Jia
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, School of Life Science, Nanjing Normal University, Nanjing 210023, China; (L.J.); (L.L.); (X.X.); (L.S.)
| | - Lulu Luo
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, School of Life Science, Nanjing Normal University, Nanjing 210023, China; (L.J.); (L.L.); (X.X.); (L.S.)
| | - Xinru Xu
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, School of Life Science, Nanjing Normal University, Nanjing 210023, China; (L.J.); (L.L.); (X.X.); (L.S.)
| | - Yangyang Xiang
- Smart Health Big Data Analysis and Location Services Engineering Laboratory of Jiangsu Province, Department of Bioinformatics, School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (L.G.); (Y.X.); (Y.R.); (D.R.)
| | - Yujie Ren
- Smart Health Big Data Analysis and Location Services Engineering Laboratory of Jiangsu Province, Department of Bioinformatics, School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (L.G.); (Y.X.); (Y.R.); (D.R.)
| | - Dekang Ren
- Smart Health Big Data Analysis and Location Services Engineering Laboratory of Jiangsu Province, Department of Bioinformatics, School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (L.G.); (Y.X.); (Y.R.); (D.R.)
| | - Lulu Shen
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, School of Life Science, Nanjing Normal University, Nanjing 210023, China; (L.J.); (L.L.); (X.X.); (L.S.)
| | - Tingming Liang
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, School of Life Science, Nanjing Normal University, Nanjing 210023, China; (L.J.); (L.L.); (X.X.); (L.S.)
- Correspondence:
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21
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Yang X, Qin C, Zhao B, Li T, Wang Y, Li Z, Li T, Wang W. Long Noncoding RNA and Circular RNA: Two Rising Stars in Regulating Epithelial-Mesenchymal Transition of Pancreatic Cancer. Front Oncol 2022; 12:910678. [PMID: 35719940 PMCID: PMC9204003 DOI: 10.3389/fonc.2022.910678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a highly malignant tumor with especially poor prognosis. However, the molecular mechanisms of pancreatic oncogenesis and malignant progression are not fully elucidated. Epithelial-mesenchymal transition (EMT) process is important to drive pancreatic carcinogenesis. Recently, long noncoding RNAs (lncRNAs) and circular RNAs(circRNAs) have been characterized to participate in EMT in PDAC, which can affect the migration and invasion of tumor cells by playing important roles in epigenetic processes, transcription, and post-transcriptional regulation. LncRNAs can act as competing endogenous RNAs (ceRNA) to sequester target microRNAs(miRNAs), bind to the genes which localize physically nearby, and directly interact with EMT-related proteins. Currently known circRNAs mostly regulate the EMT process in PDAC also by acting as a miRNA sponge, directly affecting the protein degradation process. Therefore, exploring the functions of lncRNAs and circRNAs in EMT during pancreatic cancer might help pancreatic cancer treatments.
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Affiliation(s)
- Xiaoying Yang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Cheng Qin
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Bangbo Zhao
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tianhao Li
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yuanyang Wang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zeru Li
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tianyu Li
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Weibin Wang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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22
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Li D, Fu Z, Dong C, Song Y. Downregulation of circATXN7 represses non-small cell lung cancer growth by releasing miR-7-5p. Thorac Cancer 2022; 13:1597-1610. [PMID: 35445786 PMCID: PMC9161317 DOI: 10.1111/1759-7714.14426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/29/2022] [Accepted: 03/30/2022] [Indexed: 11/29/2022] Open
Abstract
Background Circular RNAs (circRNAs) participate in the occurrence and progression of many cancers. CircRNA ataxin 7 (circATXN7) (circBase ID: hsa_circ_0066436) plays a promoting influence on gastric cancer progression. However, the biological role of circATXN7 in non‐small cell lung cancer (NSCLC) is indistinct. Methods Levels of circATXN7, microRNA (miR)‐7‐5p, and profilin 2 (PFN2) mRNA were detected using quantitative real‐time polymerase chain reaction (RT‐qPCR). Proliferation, apoptosis, metastasis, and invasion were analyzed using cell counting kit‐8 (CCK‐8), colony formation, 5‐ethynyl‐2′‐deoxyuridine (EdU), flow cytometry, and transwell assays. Protein levels were analyzed using western blotting (WB) and immunohistochemistry (IHC). The relationship between circATXN7 or PFN2 and miR‐7‐5p was analyzed by dual‐luciferase reporter and RNA immunoprecipitation (RIP) assays. The biological function of circATXN7 was verified by xenograft assay. Results CircATXN7 and PFN2 were highly expressed in NSCLC, whereas miR‐7‐5p expression had the opposite trend. CircATXN7 overexpression constrained apoptosis and promoted proliferation, metastasis, invasion, and epithelial‐mesenchymal transition of NSCLC cells, but circATXN7 silencing played the opposing influence and repressed xenograft tumor growth in vivo. CircATXN7 served as a miR‐7‐5p sponge, and circATXN7 regulated malignant behaviors of NSCLC cells through sponging miR‐7‐5p. PFN2 acted as a miR‐7‐5p target. PFN2 silencing overturned the promoting effect of miR‐7‐5p inhibitor on NSCLC cell malignancy, while PFN2 overexpression reversed the inhibitory impact of miR‐7‐5p mimic on NSCLC cell malignancy. Conclusion CircATXN7 accelerated the malignancy of NSCLC cells through adsorbing miR‐7‐5p and upregulating PFN2, offering evidence to support circATXN7 as a target for NSCLC treatment.
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Affiliation(s)
- Dongliang Li
- Department of Thoracic Surgery, Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - Zejun Fu
- Department of Thoracic Surgery, Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - Chaoqun Dong
- Department of Thoracic Surgery, Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yongming Song
- Department of Thoracic Surgery, Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, China
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Chen W, Yu X, Wang N, Jing J, Li R, Lian M. Circ_RPPH1 regulates glioma cell malignancy by binding to miR-627-5p/miR-663a to induce SDC1 expression. Metab Brain Dis 2022; 37:1231-1245. [PMID: 35334040 DOI: 10.1007/s11011-022-00965-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/14/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Recent studies revealed the key role of circular RNA (circRNA) in glioma progression. However, the effect of circ_0000520, also named as circRNA ribonuclease P RNA component H1 (circ_RPPH1), in glioma development was unknown. The study aimed to reveal the role of circ_RPPH1 in glioma cell malignancy. METHODS Human astrocytes (NHA) and glioma cell lines (A172 and U251) were employed in this study. Quantitative real-time polymerase chain reaction and western blot were used to check the expression of circ_RPPH1, microRNA-627-5p (miR-627-5p), miR-663a and syndecan 1 (SDC1). Immunohistochemistry assay was conducted to assess the protein expression of nuclear proliferation marker ki67 and matrix metalloprotein 9 (MMP9). Cell viability was assessed by 3-(4,5-Dimethylthazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Cell proliferation and apoptosis were investigated by flow cytometry analysis, 5-Ethynyl-29-deoxyuridine, or cell colony formation assay. Cell migration and invasion were evaluated by transwell assays. The interaction between miRNAs (miR-627-5p and miR-663a) and circ_RPPH1 or SDC1 was identified by a dual-luciferase reporter assay. A mouse model assay was performed to reveal the impact of circ_RPPH1 knockdown on glioma cell malignancy in vivo by analyzing neoplasm volume and weight. RESULTS Circ_RPPH1 and SDC1 expression were significantly increased, whereas miR-627-5p and miR-663a expression were decreased in glioma tissues and cells in comparison with healthy brain tissues or human astrocytes. Circ_RPPH1 depletion led to the decreased cell proliferation, migration and invasion, and the increased cell apoptosis. Additionally, circ_RPPH1 bound to miR-627-5p/miR-663a and mediated glioma cell processes by interacting with them. SDC1 overexpression attenuated miR-627-5p/miR-663a-mediated actions. Moreover, circ_RPPH1 regulated SDC1 expression through interaction with miR-627-5p and/or miR-663a. Furthermore, circ_RPPH1 knockdown inhibited glioma cell malignancy in vivo, accompanied by the decreases of ki67 and MMP9 expression. CONCLUSION Circ_RPPH1 knockdown inhibited glioma tumorigenesis by downregulating SDC1 by binding to miR-627-5p/miR-663a, showing that circ_RPPH1 might be an effective therapeutic target for glioma.
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Affiliation(s)
- Wei Chen
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiao-Tong University, No.227, Yanta west Road, Xi'an, 710061, Shaanxi province, China
| | - Xiao Yu
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiao-Tong University, No.227, Yanta west Road, Xi'an, 710061, Shaanxi province, China
| | - Ning Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiao-Tong University, No.227, Yanta west Road, Xi'an, 710061, Shaanxi province, China
| | - Jiangpeng Jing
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiao-Tong University, No.227, Yanta west Road, Xi'an, 710061, Shaanxi province, China
| | - Ruichun Li
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiao-Tong University, No.227, Yanta west Road, Xi'an, 710061, Shaanxi province, China
| | - Minxue Lian
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiao-Tong University, No.227, Yanta west Road, Xi'an, 710061, Shaanxi province, China.
- , Xi'an, China.
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Circular RNA TLK1 Exerts Oncogenic Functions in Hepatocellular Carcinoma by Acting as a ceRNA of miR-138-5p. JOURNAL OF ONCOLOGY 2022; 2022:2415836. [PMID: 35359342 PMCID: PMC8964207 DOI: 10.1155/2022/2415836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/12/2022] [Accepted: 02/25/2022] [Indexed: 11/21/2022]
Abstract
Mounting evidence has shown that circular RNAs (circRNAs) function as key regulators in carcinogenesis and cancer progression, and this study is aimed at investigating the regulatory functions of circRNA TLK1 (circ-TLK1) in hepatocellular carcinoma (HCC). We observed that circ-TLK1 was highly expressed in HCC samples, and its high expression was closely associated with poor clinicopathological variables of HCC patients. The results of functional experiments revealed that knockdown of circ-TLK1 remarkably inhibited the proliferation, migration, invasion, and EMT of HCC cells, while circ-TLK1 overexpression promoted these malignant behaviors. Moreover, we noted that circ-TLK1 was capable of binding to miR-138-5p and upregulating its target gene, SOX4 in HCC. Based on rescue assays, miR-138-5p inhibition partially suppressed the effects of circ-TLK1 knockdown on the malignant behaviors of HCC cells. In short, this study is the first to indicate that circ-TLK1 functions as an oncogene in HCC progression partly through acting as a ceRNA of miR-138-5p, which may be a promising target for HCC therapy.
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Pitolli C, Marini A, Sette C, Pagliarini V. Non-Canonical Splicing and Its Implications in Brain Physiology and Cancer. Int J Mol Sci 2022; 23:ijms23052811. [PMID: 35269953 PMCID: PMC8911335 DOI: 10.3390/ijms23052811] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 02/01/2023] Open
Abstract
The advance of experimental and computational techniques has allowed us to highlight the existence of numerous different mechanisms of RNA maturation, which have been so far unknown. Besides canonical splicing, consisting of the removal of introns from pre-mRNA molecules, non-canonical splicing events may occur to further increase the regulatory and coding potential of the human genome. Among these, splicing of microexons, recursive splicing and biogenesis of circular and chimeric RNAs through back-splicing and trans-splicing processes, respectively, all contribute to expanding the repertoire of RNA transcripts with newly acquired regulatory functions. Interestingly, these non-canonical splicing events seem to occur more frequently in the central nervous system, affecting neuronal development and differentiation programs with important implications on brain physiology. Coherently, dysregulation of non-canonical RNA processing events is associated with brain disorders, including brain tumours. Herein, we summarize the current knowledge on molecular and regulatory mechanisms underlying canonical and non-canonical splicing events with particular emphasis on cis-acting elements and trans-acting factors that all together orchestrate splicing catalysis reactions and decisions. Lastly, we review the impact of non-canonical splicing on brain physiology and pathology and how unconventional splicing mechanisms may be targeted or exploited for novel therapeutic strategies in cancer.
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Affiliation(s)
- Consuelo Pitolli
- Department of Neuroscience, Section of Human Anatomy, Catholic University of the Sacred Heart, 00168 Rome, Italy; (C.P.); (C.S.)
- GSTEP-Organoids Research Core Facility, IRCCS Fondazione Policlinico Universitario Agostino Gemelli, 00168 Rome, Italy;
| | - Alberto Marini
- GSTEP-Organoids Research Core Facility, IRCCS Fondazione Policlinico Universitario Agostino Gemelli, 00168 Rome, Italy;
| | - Claudio Sette
- Department of Neuroscience, Section of Human Anatomy, Catholic University of the Sacred Heart, 00168 Rome, Italy; (C.P.); (C.S.)
- GSTEP-Organoids Research Core Facility, IRCCS Fondazione Policlinico Universitario Agostino Gemelli, 00168 Rome, Italy;
| | - Vittoria Pagliarini
- Department of Neuroscience, Section of Human Anatomy, Catholic University of the Sacred Heart, 00168 Rome, Italy; (C.P.); (C.S.)
- GSTEP-Organoids Research Core Facility, IRCCS Fondazione Policlinico Universitario Agostino Gemelli, 00168 Rome, Italy;
- Correspondence:
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26
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AmeliMojarad M, AmeliMojarad M, Nourbakhsh M. Circulating circular RNA ADAM9 a potential biomarker for human colorectal cancer. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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27
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Jiang B, Tian M, Li G, Sadula A, Xiu D, Yuan C, Bing Y. circEPS15 Overexpression in Hepatocellular Carcinoma Modulates Tumor Invasion and Migration. Front Genet 2022; 13:804848. [PMID: 35211158 PMCID: PMC8861492 DOI: 10.3389/fgene.2022.804848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/17/2022] [Indexed: 12/16/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the leading causes of cancer-related deaths worldwide. Recent evidence has shown that circular RNAs (circRNAs) play important roles in tissue development, gene transcription, signal regulation and tumorigenesis. However, whether circRNAs are involved in HCC progression and encode functional proteins remains largely unknown. In the present study, we aimed to explore the function and molecular mechanism of circRNAs in HCC. First, many circRNAs were found to be differentially expressed in HCC samples and paired adjacent normal liver tissues. The validation of dysregulated circRNAs by qRT-PCR revealed that circEPS15 expression was downregulated in HCC tissues, and the survival curves showed that low circEPS15 levels were associated with poor overall survival in HCC patients. Then, the overexpression of circEPS15 suppressed tumor cell invasion and migration by inhibiting the TJP1/CDH2/VIM signaling pathway and retarded cell cycle progression, which was confirmed by the Transwell culture system, wound healing assays, flow cytometry and western blot assays. After that, the spanning junction open reading frame in circEPS15 driven by IRES was shown to encode a novel protein, which was verified by western blotting with full-length, mutated, and truncated sequences of circEPS15 with a FLAG tag. Moreover, ceRNA analysis and qRT-PCR results suggest a possible circRNA (circEPS15)-miRNA-mRNA network in HCC. Collectively, our study reveals that endogenous circEPS15 plays a novel role in repressing HCC through the ceRNA network and encodes a functional protein.
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Affiliation(s)
- Bin Jiang
- Department of General Surgery, Peking University Third Hospital, Beijing, China
| | - Maolin Tian
- Department of General Surgery, Peking University Third Hospital, Beijing, China
| | - Gang Li
- Department of General Surgery, Peking University Third Hospital, Beijing, China
| | | | - Dianrong Xiu
- Department of General Surgery, Peking University Third Hospital, Beijing, China
| | - Chunhui Yuan
- Department of General Surgery, Peking University Third Hospital, Beijing, China
| | - Yuntao Bing
- Department of General Surgery, Peking University Third Hospital, Beijing, China
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28
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Zhou Y, Li C, Wang Z, Tan S, Liu Y, Zhang H, Li X. CircRNAs as Novel Biomarkers and Therapeutic Targets in Renal Cell Carcinoma. Front Mol Biosci 2022; 9:833079. [PMID: 35223991 PMCID: PMC8874010 DOI: 10.3389/fmolb.2022.833079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 01/24/2022] [Indexed: 12/28/2022] Open
Abstract
Circular RNAs (circRNAs) are a type of long non-coding RNA with covalently closed loops that are naturally resistant to exoribonuclease. With the rapid development of high-throughput sequencing technologies and bioinformatics, increasing data suggest that circRNAs are abnormally expressed in renal cell carcinoma (RCC) and act as important regulators of RCC carcinogenesis and progression. CircRNAs play important biological roles in modulating cell proliferation, migration, invasion, apoptosis, and gemcitabine chemoresistance in RCC. Most of the circRNAs studied in RCC have been reported to be significantly associated with many clinicopathologic characteristics and survival parameters of RCC. The stability and specificity of circRNAs enable them potential molecular markers for RCC diagnosis and prognosis. Moreover, circRNAs have emerged as targets for developing new therapies, because they can regulate various signaling pathways associated with RCC initiation and progression. In this review, we briefly summarize the biogenesis, degradation, and biological functions of circRNAs as well as the potential clinical applications of these molecules for RCC diagnosis, prognosis, and targeted therapy.
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Affiliation(s)
- Yuxia Zhou
- The First Affiliated Hospital, Department of Medical Oncology, Hengyang Medical School, University of South China, Hengyang, China
| | - Cheng Li
- The First Affiliated Hospital, Department of Medical Oncology, Hengyang Medical School, University of South China, Hengyang, China
| | - Zhenping Wang
- The First Affiliated Hospital, Department of Medical Oncology, Hengyang Medical School, University of South China, Hengyang, China
| | - Shuangfeng Tan
- The First Affiliated Hospital, Department of Medical Oncology, Hengyang Medical School, University of South China, Hengyang, China
| | - Yiqi Liu
- The Second Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - Hu Zhang
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - Xuefeng Li
- The First Affiliated Hospital, Department of Medical Oncology, Hengyang Medical School, University of South China, Hengyang, China
- *Correspondence: Xuefeng Li,
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Liu W, Deng L, Xu A, Xiong X, Tao J, Chang J, Xu Y, Zhou Z. Identifying a novel IRF3/circUHRF1/miR-1306-5p/ARL4C axis in pancreatic ductal adenocarcinoma progression. Cell Cycle 2022; 21:392-405. [PMID: 34983293 PMCID: PMC8855851 DOI: 10.1080/15384101.2021.2020450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/29/2021] [Accepted: 12/09/2021] [Indexed: 01/26/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is considered one most aggressive and lethal cancer types worldwide. While its underlying mechanisms are still poorly understood. CircRNAs play essential roles in various biological progression, including PDAC. Here, our results found that circUHRF1 was highly expressed in PDAC tumor tissues compared with normal tissues. Next, Cell or animal models were constructed, CCK-8, cell colony, EdU, flow cytometry assay, transwell migration, and Western blot assays were applied. CircUHRF1 knockdown influenced PDAC cell proliferation, apoptosis, migration and EMT level in vitro, and tumor growth in vivo. Subsequently, bioinformatics analysis, AGO2-RIP, RNA pull-down, and dual-luciferase reporter assays were used to explore the downstream targets in PDAC progression. Our findings suggest that circUHRF1 regulated ARL4C expression to promote PDAC progression through sponging miR-1306-5p. The role of miR-1306-5p in PDAC cellular progression has been elucidated, and the expression association between miR-1306-5p and circUHRF1 or ARL4C in PDAC tissues was analyzed. Furthermore, circUHRF1 expression in PDAC cells could be transcriptionally regulated by IRF3. Collectively, our study demonstrated the role of IRF3/circUHRF1/miR-1306-5p/ARL4C axis in PDAC progression. Our results suggest that circUHRF1 is one promising diagnosis or therapeutic target for PDAC management.Abbreviations : CircRNA; Circular RNAPDAC; pancreatic ductal adenocarcinomaUHRF1; Ubiquitin-like with PHD and RING finger domain 1ARL4C; ADP Ribosylation Factor Like GTPase 4CRIP; RNA immunoprecipitationEDU; 5-Ethynyl-2'-deoxyuridineEMT; epithelial to mesenchymal transitionAGO2; Argonaute RISC Catalytic Component 2CCK8; Cell counting Kit-8IRF3; Interferon Regulatory Factor 3.
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Affiliation(s)
- Wei Liu
- Department of Medical Management, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
- Department of Medical Management, Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Lisha Deng
- Department of Neurosurgery, Hospital of Chengdu University of Traditional Chinese MedicineChengdu, China
| | - Anchun Xu
- Department of Clinical Laboratory, Hospital of Chengdu University of Traditional Chinese MedicineChengdu, China
| | - Xingcheng Xiong
- Department of Pancreatic Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jing Tao
- Department of Pancreatic Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jian Chang
- Department of Pancreatic Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yiling Xu
- Obstetrics and Gynecology Department, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhilin Zhou
- Department of General Surgery, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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30
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Zhu B, Ke L, Li P, Wang X, Yang L, Bai M, Chen M. CircACC1 Promotes NSCLC Proliferation via miR-29c-3p/MCL-1 Signaling Pathway. Front Genet 2022; 12:798587. [PMID: 35069696 PMCID: PMC8776987 DOI: 10.3389/fgene.2021.798587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/25/2021] [Indexed: 12/03/2022] Open
Abstract
Non-small cell lung cancer remains the leading cause of cancer-related deaths worldwide with high morbidity and mortality. There is an urgent need to reveal new molecular mechanisms that contribute to NSCLC progression to facilitate drug development and to improve overall survival. Much attention has been paid to the role of circRNAs in NSCLC development. However, the knowledge of circRNAs in NSCLC is still limited, and need to be further explored. The dysregulation of circACC1 was evaluated by qRT-PCR in NSCLC samples and cell lines. The oncogenic role of circACC1 in NSCLC progression was analyzed by CCK8 and colony formation assays. The interaction between the circACC1 and miR-29c-3p, as well as MCL-1, was verified by qRT-PCR, Western blot, luciferase reporter assay, and RIP experiment. Elevated levels of circACC1 were found in NSCLC patients and were negatively correlated with OS. Ectopic expression of circACC1 promoted the capacity of cell growth and clonogenicity, while the inhibition of circACC1 decreased the proliferation and clonogenicity potential. Mechanism studies elucidated that circACC1 contributes to cell growth via directly binding to miR-29c-3p. Transfection of miR-29c-3p mimic blocked circACC1 mediated NSCLC cell proliferation. MCL-1 is a downstream target of miR-29c-3p in NSCLC cells. The circACC1/miR-29c-3p/MCL-1 axis is important in NSCLS proliferation.
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Affiliation(s)
- Bo Zhu
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Lixia Ke
- Department of Medical Oncology, General Hospital of Heilongjiang Province Land Reclamation Bureau, Harbin, China
| | - Peixian Li
- Department of Medical Oncology, General Hospital of Heilongjiang Province Land Reclamation Bureau, Harbin, China
| | - Xin Wang
- Department of Medical Oncology, General Hospital of Heilongjiang Province Land Reclamation Bureau, Harbin, China
| | - Lan Yang
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Minghua Bai
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Mailin Chen
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Radiology of Department, Peking University Cancer Hospital and Institute, Beijing, China
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31
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Liu J, Dong Y, Ji Q, Wen Y, Ke G, Shi L, Guan W, Xu W. Circ-MKLN1/miR-377-3p/CTGF Axis Regulates the TGF-β2-induced Posterior Capsular Opacification in SRA01/04 Cells. Curr Eye Res 2021; 47:372-381. [PMID: 34961410 DOI: 10.1080/02713683.2021.1988983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Posterior capsular opacification (PCO) is a common postoperative ocular complication after cataract surgery. Little research focused on the regulation of circular RNAs (circRNAs) in PCO. This study was designed to investigate the function of circRNA-muskelin (circ-MKLN1) in PCO. METHODS SRA01/04 cells were treated with transforming growth factor (TGF)-β2. Cell viability was analyzed by Cell Counting Kit-8 (CCK-8) assay. Transwell assay was used for cell migration and invasion detection. Cell migration was also measured by wound healing assay. Epithelial-mesenchymal transition (EMT)-related proteins and connective tissue growth factor (CTGF) were quantified using western blot. RESULTS Cell viability, migration, invasion and EMT process in SRA01/04 cells were facilitated by TGF-β2. Circ-MKLN1 expression was enhanced in 17 PCO lens samples relative to 19 normal lens samples and TGF-β2-treated SRA01/04 cells contrasted to control cells. Downregulation of circ-MKLN1 inhibited the effects of TGF-β2 on SRA01/04 cells. Circ-MKLN1 targeted miR-377-3p and the regulation of si-circ-MKLN1 for the TGF-β2-induced influences was related to the upregulation of miR-377-3p. CTGF was the target gene for miR-377-3p. CTGF knockdown also abolished the TGF-β2-mediated cell growth, migration and invasion of SRA01/04 cells. The function of miR-377-3p was achieved by reducing the CTGF level. TGF-β2-induced CTGF expression promotion was alleviated by si-circ-MKLN1 through upregulating the expression of miR-377-3p. CONCLUSION These results showed that circ-MKLN1 contributed to the progression of PCO in vitro by increasing the CTGF expression via sponging miR-377-3p. Circ-MKLN1 might be important for improving the molecular target therapy in PCO.
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Affiliation(s)
- Jiajia Liu
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei City, Anhui, 230001, China.,Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China.,Anhui Provincial Key Laboratory of Tumor Immunotherapy and Nutrition Therapy, Hefei, China.,Gerontology Institute of Anhui Province, Hefei, Anhui, China
| | - Yiran Dong
- Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China
| | - Qingshan Ji
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei City, Anhui, 230001, China.,Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China.,Anhui Provincial Key Laboratory of Tumor Immunotherapy and Nutrition Therapy, Hefei, China
| | - Yuechun Wen
- Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China
| | - Genjie Ke
- Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China
| | - Lei Shi
- Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China
| | - Wei Guan
- Department of Ophthalmology, The First Affiliated Hospital of USTC, Hefei, Anhui, China
| | - Weiping Xu
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei City, Anhui, 230001, China.,Anhui Provincial Key Laboratory of Tumor Immunotherapy and Nutrition Therapy, Hefei, China.,Gerontology Institute of Anhui Province, Hefei, Anhui, China
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Cai Zhang, Li B, Huang Y, Gao S, Gao X. Biogenesis, Functions, and Cancer Relationships of a Specific Circular RNA: CircFoxo3. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2021. [DOI: 10.1134/s106816202106025x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Dong X, Zhang P, Liu L, Li H, Cheng S, Li S, Wang Y, Zheng C, Dong J, Zhang L. The Circ_0001367/miR-545-3p/LUZP1 Axis Regulates Cell Proliferation, Migration and Invasion in Glioma Cells. Front Oncol 2021; 11:781471. [PMID: 34869035 PMCID: PMC8637337 DOI: 10.3389/fonc.2021.781471] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/01/2021] [Indexed: 01/05/2023] Open
Abstract
Glioma is the most common primary intracranial malignant tumour in adults. It has a high incidence and poses a serious threat to human health. Circular RNA is a hotspot of cancer research. In this study, we aimed to explore the role of circ_0001367 in gliomagenesis and the underlying mechanism. First, qRT-PCR was conducted, which showed that circ_0001367 level was downregulated in glioma tissues and cells. Next, gain-of-function and loss-of-function assays were performed, which indicated that circ_0001367 inhibited the proliferation, migration and invasion of glioma cells. Subsequent bioinformatics analysis, dual-luciferase reporter assays, RNA immunoprecipitation assays and cell function assays demonstrated that circ_0001367 inhibited the proliferation, migration and invasion of glioma cells by absorbing miR-545-3p and thereby regulating the expression of leucine zipper protein (LUZP1). Finally, an in vivo experiment was conducted, which demonstrated that circ_0001367 inhibited glioma growth in vivo by modulating miR-545-3p and LUZP1. Taken together, the results of this study demonstrate that the circ_0001367/miR-545-3p/LUZP1 axis may be a novel target for glioma therapy.
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Affiliation(s)
- Xuchen Dong
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China.,Medical College of Soochow University, Suzhou, China
| | - Peng Zhang
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China.,Department of Neurosurgery, Rugao Hospital Affiliated to Nantong University, Nantong, China
| | - Liang Liu
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Haoran Li
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shan Cheng
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Suwen Li
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yuan Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Chaonan Zheng
- College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Jun Dong
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Li Zhang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, China
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Wang S, Ying Y, Ma X, Wang W, Wang X, Xie L. Diverse Roles and Therapeutic Potentials of Circular RNAs in Urological Cancers. Front Mol Biosci 2021; 8:761698. [PMID: 34869591 PMCID: PMC8640215 DOI: 10.3389/fmolb.2021.761698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/20/2021] [Indexed: 12/14/2022] Open
Abstract
Circular RNAs (circRNAs) are a novel class of noncoding RNAs, which are mainly formed as a loop structure at the exons caused by noncanonical splicing; they are much more stable than linear transcripts; recent reports have suggested that the dysregulation of circRNAs is associated with the occurrence and development of diseases, especially various human malignancies. Emerging evidence demonstrated that a large number of circRNAs play a vital role in a series of biological processes such as tumor cell proliferation, migration, drug resistance, and immune escape. Additionally, circRNAs were also reported to be potential prognostic and diagnostic biomarkers in cancers. In this work, we systematically summarize the biogenesis and characteristics of circRNAs, paying special attention to potential mechanisms and clinical applications of circRNAs in urological cancers, which may help develop potential therapy targets for urological cancers in the future.
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Affiliation(s)
- Song Wang
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yufan Ying
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xueyou Ma
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Weiyu Wang
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiao Wang
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Liping Xie
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Ghafouri-Fard S, Khoshbakht T, Taheri M, Jamali E. A Concise Review on the Role of CircPVT1 in Tumorigenesis, Drug Sensitivity, and Cancer Prognosis. Front Oncol 2021; 11:762960. [PMID: 34804965 PMCID: PMC8599443 DOI: 10.3389/fonc.2021.762960] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/15/2021] [Indexed: 12/16/2022] Open
Abstract
CircPVT1 (hsa_circ_0001821) is a cancer-related circular RNA (circRNA) that originated from a genomic locus on chromosome 8q24. This locus has been previously found to encode the oncogenic long non-coding RNA PVT1. Expression of this circRNA has been found to be upregulated in diverse neoplastic conditions. CircPVT1 acts as a sponge for miR-125a, miR-125b, miR-124-3p, miR-30a-5p, miR-205-5p, miR-423-5p, miR-526b, miR-137, miR-145-5p, miR-497, miR-30d/e, miR-455-5p, miR-29a-3p, miR-204-5p, miR-149, miR-106a-5p, miR-377, miR-3666, miR-203, and miR-199a-5p. Moreover, it can regulate the activities of PI3K/AKT, Wnt5a/Ror2, E2F2, and HIF-1α. Upregulation of circPVT1 has been correlated with decreased survival of patients with different cancer types. In the current review, we explain the oncogenic impact of circPVT1 in different tissues based on evidence from in vitro, in vivo, and clinical investigations.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Tayyebeh Khoshbakht
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Institute of Human Genetics, Jena University Hospital, Jena, Germany
| | - Elena Jamali
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Pathology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Li X, Gao F, Fan Y, Xie S, Li C, Meng L, Li L, Zhang S, Wei H. A novel identified circ-ANKHD1 targets the miR-27a-3p/SFRP1 signaling pathway and modulates the apoptosis of granulosa cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:57459-57469. [PMID: 34091845 DOI: 10.1007/s11356-021-14699-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/31/2021] [Indexed: 06/12/2023]
Abstract
The specific expression profile and function of circular RNAs (circRNAs) in mammalian ovarian follicles, especially during the atresia process, are unclear. In this study, we verified and explored the expression and function of circ-ANKHD1 in granulosa cells. Our results showed that abundance of circ-ANKHD1 was significantly lower in the granulosa cells than that of ANKHD1. The expression of ANKHD1 was highest in the granulosa cells from follicles with a diameter of 5-6 mm and lowest in that with a diameter of 3-4 mm. Furthermore, the expression level of circ-ANKHD1 in the ovarian tissue of 1-day-old piglets was significantly higher than that of 17-month-old multiparous sows. The luciferase reporter assay showed the potential interaction between circ-ANKHD1 and miR-27a-3p/miR-142-5p. Furthermore, circ-ANKHD1 overexpression up-regulated SFRP1 expression, while miR-27a-3p overexpression suppressed SFRP1 expression in granulosa cells. Circ-ANKHD1 overexpression significantly decreased the cell apoptotic rates of the granulosa cells and repressed the cell population at G0/G1 and S phases but increased cell population at G2/M phase. Finally, circ-ANKHD1 overexpression increased the mRNA expression levels of Bcl-2 and cyclin D1 in the granulosa cells, while there are no effects on the mRNA expression levels of caspase-3, p53, Bax, and proliferating cell nuclear antigen. In conclusion, our study for the first time identified a novel circRNA, circ-ANKHD1 that may be associated with the biological functions of granulosa cells. Circ-ANKHD1 may promote the granulosa cell proliferation, but attenuate apoptosis, and these effects may be associated with modulation of miR-27a-3p/SFRP1.
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Affiliation(s)
- Xiaoyan Li
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Fenglei Gao
- Department of Tropical Agriculture and Forestry, College of Guangdong Agriculture Industry Business Polytechnic, Guangzhou, 510507, Guangdong, China
| | - Yushan Fan
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Shefeng Xie
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Chengde Li
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Li Meng
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Li Li
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Shouquan Zhang
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Hengxi Wei
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
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Gaffo E, Buratin A, Dal Molin A, Bortoluzzi S. Sensitive, reliable and robust circRNA detection from RNA-seq with CirComPara2. Brief Bioinform 2021; 23:6409697. [PMID: 34698333 PMCID: PMC8769706 DOI: 10.1093/bib/bbab418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/09/2021] [Accepted: 09/12/2021] [Indexed: 12/11/2022] Open
Abstract
Circular RNAs (circRNAs) are a large class of covalently closed RNA molecules originating by a process called back-splicing. CircRNAs are emerging as functional RNAs involved in the regulation of biological processes as well as in disease and cancer mechanisms. Current computational methods for circRNA identification from RNA-seq experiments are characterized by low discovery rates and performance dependent on the analysed data set. We developed CirComPara2 (https://github.com/egaffo/CirComPara2), a new automated computational pipeline for circRNA discovery and quantification, which consistently achieves high recall rates without losing precision by combining multiple circRNA detection methods. In our benchmark analysis, CirComPara2 outperformed state-of-the-art circRNA discovery tools and proved to be a reliable and robust method for comprehensive transcriptome characterization.
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Affiliation(s)
- Enrico Gaffo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Alessia Buratin
- Department of Molecular Medicine, University of Padova, Padova, Italy; Department of Biology, University of Padova, Padova, Italy
| | - Anna Dal Molin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Stefania Bortoluzzi
- Department of Molecular Medicine, University of Padova, Padova, Italy; Interdepartmental Center For Innovative Biotechnologies, University of Padova, Padova, Italy
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Smith AJ, Sompel KM, Elango A, Tennis MA. Non-Coding RNA and Frizzled Receptors in Cancer. Front Mol Biosci 2021; 8:712546. [PMID: 34671643 PMCID: PMC8521042 DOI: 10.3389/fmolb.2021.712546] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/30/2021] [Indexed: 12/18/2022] Open
Abstract
Frizzled receptors have been long recognized for their role in Wnt/β-catenin signaling, a pathway known for its tumorigenic effects. More recent studies of frizzled receptors include efforts to understand non-coding RNA (ncRNA) regulation of these receptors in cancer. It has become increasingly clear that ncRNA molecules are important for regulating the expression of both oncogenic and tumor-suppressive proteins. The three most commonly described ncRNA molecules are microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs). Here, we review ncRNA molecules that directly or indirectly affect frizzled protein expression and downstream signaling. Exploring these interactions highlights the potential of incorporating ncRNA molecules into cancer prevention and therapy strategies that target frizzled receptors. Previous investigations of frizzled receptors and ncRNA have established strong promise for a role in cancer progression, but additional studies are needed to provide the substantial pre-clinical evidence required to translate findings to clinical applications.
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Xu H, Chen R, Shen Q, Yang D, Peng H, Tong J, Fu Q. Overexpression of Circular RNA circ_0013587 Reverses Erlotinib Resistance in Pancreatic Cancer Cells Through Regulating the miR-1227/E-Cadherin Pathway. Front Oncol 2021; 11:754146. [PMID: 34552882 PMCID: PMC8450525 DOI: 10.3389/fonc.2021.754146] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 08/18/2021] [Indexed: 12/12/2022] Open
Abstract
Background Erlotinib, a small-molecule epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor, demonstrated therapeutic efficacy against pancreatic cancer. However, acquired resistance to erlotinib in pancreatic cancer is widely observed, and the exact mechanisms have not been fully explored until now. We examined the role of circular RNA circ_0013587 in the acquired resistance to erlotinib in pancreatic cancer cells and explored the underlying mechanisms. Methods We selected erlotinib-resistant pancreatic cancer cells from the AsPC-1 cell line. The expression of circ_0013587 was examined by qRT-PCR assays. The effects of circ_0013587 on pancreatic cancer cell proliferation, invasion, and erlotinib resistance were assessed by cell functional assays. Bioinformatic analysis and dual-luciferase reporter assays identified circ_0013587 and E-cadherin as direct targets of miR-1227. Mouse xenograft models were employed to investigate the function of circ_0013587 in erlotinib resistance of tumors in vivo. Results Circ_0013587 expression was significantly reduced in erlotinib-resistant AsPC-1 cells. We found that increasing circ_0013587 levels in erlotinib-resistant AsPC-1 cells re-sensitized them, whereas reducing circ_0013587 levels in erlotinib-sensitive AsPC-1 cells made them resistant. Mechanically, circ_0013587 released E-cadherin from the suppression of miR-1227, leading to E-cadherin up-regulation. Rescue assays highlighted that circ_0013587 reversed erlotinib resistance in pancreatic cancer cells by increasing E-cadherin levels through reducing the expression of miR-1227. Furthermore, circ_0013587 overexpression sensitized erlotinib-resistant AsPC-1 cells to erlotinib in xenograft models. Conclusions Our results demonstrated that down-regulation of circ_0013587 contributes to acquired resistance to erlotinib in pancreatic cancer cells through mediating the miR-1227/E-cadherin pathway and that circ_0013587 is a potential target molecular to overcome erlotinib resistance.
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Affiliation(s)
- Huiting Xu
- Department of Abdominal Oncology, Hubei Cancer Hospital, Wuhan, China
| | - Runzhi Chen
- Department of Abdominal Oncology, Hubei Cancer Hospital, Wuhan, China
| | - Qian Shen
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dongmei Yang
- Department of Abdominal Oncology, Hubei Cancer Hospital, Wuhan, China
| | - Hui Peng
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jin Tong
- Department of PICC, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiang Fu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Li Y, Chen J, Chen Z, Xu X, Weng J, Zhang Y, Mo Y, Liu Y, Wang J, Ke Y. CircGLIS3 Promotes High-Grade Glioma Invasion via Modulating Ezrin Phosphorylation. Front Cell Dev Biol 2021; 9:663207. [PMID: 34540823 PMCID: PMC8446459 DOI: 10.3389/fcell.2021.663207] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 07/30/2021] [Indexed: 12/12/2022] Open
Abstract
High-grade glioma is highly invasive and malignant, resistant to combined therapies, and easy to relapse. A better understanding of circular RNA (circRNA) biological function in high-grade glioma might contribute to the therapeutic efficacy. Here, a circRNA merely upregulated in high-grade glioma, circGLIS3 (hsa_circ_0002874, originating from exon 2 of GLIS3), was validated by microarray and Real-time quantitative reverse transcription PCR (qRT-PCR). The role of circGLIS3 in glioma was assessed by functional experiments both in vitro and in vivo. Fluorescence in situ hybridization (FISH), RNA pull-down, RNA immunoprecipitation (RIP), and immunohistochemical staining were performed for mechanistic study. Cocultured brain endothelial cells with glioma explored the role of exosome-derived circGLIS3 in the glioma microenvironment. We found that upregulation of circGLIS3 promoted glioma cell migration and invasion and showed aggressive characteristics in tumor-bearing mice. Mechanistically, we found that circGLIS3 could promote the Ezrin T567 phosphorylation level. Moreover, circGLIS3 could be excreted by glioma through exosomes and induced endothelial cell angiogenesis. Our findings indicate that circGLIS3 is upregulated in high-grade glioma and contributes to the invasion and angiogenesis of glioma via modulating Ezrin T567 phosphorylation.
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Affiliation(s)
- Yan Li
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jiansheng Chen
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Department of Neurosurgery, Huizhou Municipal Central Hospital, Huizhou, China
| | - Zetao Chen
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xiangdong Xu
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jun Weng
- Department of Hepticbile Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yuxuan Zhang
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yunzhao Mo
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yang Liu
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jihui Wang
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yiquan Ke
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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Kadkhoda S, Taslimi R, Noorbakhsh F, Darbeheshti F, Bazzaz JT, Ghafouri-Fard S, Shakoori A. Importance of Circ0009910 in colorectal cancer pathogenesis as a possible regulator of miR-145 and PEAK1. World J Surg Oncol 2021; 19:265. [PMID: 34479583 PMCID: PMC8417957 DOI: 10.1186/s12957-021-02378-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 08/26/2021] [Indexed: 02/08/2023] Open
Abstract
Introduction Colorectal cancer (CRC) is one of the most frequent neoplasms in the world. Based on the emerging role of noncoding RNAs, particularly circular RNAs in pathogenesis of cancers, we designed this study to inspect the expression levels of a circ0009910-mediated regulatory pathway in colorectal cancer. Methods After bioinformatics analyses and construction of putative circ0009910/ miR-145-5p/PEAK1 pathway, the expression levels of these components were evaluated in 50 CRC tissues and adjacent specimens by quantitative real-time PCR. Moreover, we appraised the correlation coefficients between these transcripts and calculated the correlation between circ0009910 expression levels with clinicopathological features of patients. Results Circ0009910 and PEAK1 were significantly upregulated, while miR-145-5p was decreased in CRC samples compared with adjacent tissues (p < 0.05). Moreover, statistically significant correlations were observed between expression levels of circ0009910, miR-145-5p, and PEAK1. We also reported considerable correlations between circ0009910 expression and clinicopathological parameters including sex and perineural invasion. Finally, ROC curve analysis showed circ0009910 level as a discriminative biomarker for CRC. Conclusion For the first time, we could introduce circ0009910 as an important biomarker in CRC. Collectively, this investigation helped us to identify a newly diagnosed pathway in CRC that can be a potential axis for designing effective drugs for treatment of CRC patients. Supplementary Information The online version contains supplementary material available at 10.1186/s12957-021-02378-0.
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Affiliation(s)
- Sepideh Kadkhoda
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Taslimi
- Department of Gastroenterology, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Farshid Noorbakhsh
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh Darbeheshti
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Medical Genetics Network (MeGeNe), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Javad Tavakkoly Bazzaz
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudeh Ghafouri-Fard
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Abbas Shakoori
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. .,Department of Medical Genetics, Cancer Institute of Iran, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Dr. Qarib St., Keshavarz Blvd, Tehran, Iran.
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Chao F, Wang S, Zhang C, Han D, Xu G, Chen G. The Emerging Role of Circular RNAs in Prostate Cancer: A Systematic Review. Front Cell Dev Biol 2021; 9:681163. [PMID: 34386491 PMCID: PMC8353182 DOI: 10.3389/fcell.2021.681163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/06/2021] [Indexed: 11/13/2022] Open
Abstract
Prostate cancer is one of the most common malignant tumors that threaten the health of men. It is urgent to explore new molecular targets and develop new drugs for the treatment of prostate cancer. Circular RNAs (circRNAs) are aberrantly expressed in various malignant tumors. The dysregulated circRNAs are involved in the metastasis, tumor growth, drug resistance, and immunosuppression of malignant tumors. The present review systematically summarized publications concerning the biological implications of circRNAs in prostate cancer. The PubMed and Web of Science databases were used to retrieve publications concerning circRNAs and prostate cancer until June 16, 2021. The following keywords were used in the literature search: (circRNA OR circular RNA) AND prostate cancer. 73 publications were enrolled in the present systematic review to summarize the role of circRNAs in prostate cancer. The dysregulated and functional circRNAs were involved in the cell cycle, proliferation, migration, invasion, metastasis, drug resistance and radiosensitivity of prostate cancer. In addition, circRNAs could function through EVs and serve as prognostic and diagnostic biomarkers. Certain circRNAs were correlated with clinicopathological features of prostate cancer. A comprehensive review of the molecular mechanism of the tumorigenesis and progression of prostate cancer may contribute to the development of new therapies of prostate cancer in the future.
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Affiliation(s)
- Fan Chao
- Department of Urology, Jinshan Hospital, Fudan University, Shanghai, China
| | - Shiyu Wang
- Department of Urology, Jinshan Hospital, Fudan University, Shanghai, China
| | - Cong Zhang
- Department of Urology, Jinshan Hospital, Fudan University, Shanghai, China
| | - Dunsheng Han
- Department of Urology, Jinshan Hospital, Fudan University, Shanghai, China
| | - Guoxiong Xu
- Research Center for Clinical Medicine, Jinshan Hospital, Fudan University, Shanghai, China
| | - Gang Chen
- Department of Urology, Jinshan Hospital, Fudan University, Shanghai, China
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Liu S, Li B, Li Y, Song H. Circular RNA circ_0000228 promotes the malignancy of cervical cancer via microRNA-195-5p/ lysyl oxidase-like protein 2 axis. Bioengineered 2021; 12:4397-4406. [PMID: 34308761 PMCID: PMC8806657 DOI: 10.1080/21655979.2021.1954846] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Circular RNAs (circRNAs) are a class of novel non-coding RNAs that are vital in modulating gene expression and biological processes. Nevertheless, in cervical cancer (CC), the role of circRNA is much less investigated. In this work, circ_0000228 expression in CC is measured and circ_0000228's function and related mechanism are investigated. Quantitative real-time quantitative polymerase chain reaction (qRT-PCR) was utilized to examine the expression levels of circ_0000228, microRNA-195-5p (miR-195-5p) and lysyl oxidase-like protein 2 (LOXL2). Western blotting was employed to examine LOXL2 protein expression in CC cell lines. CC cell lines with circ_0000228 knockdown were constructed, and the CCK-8 experiment and Transwell experiment were executed to investigate the effect of circ_0000228 on the malignant characteristics of CC cells. Furthermore, a dual-luciferase reporter gene experiment was applied to validate the targeting relationship between circ_0000228 and miR-195-5p, miR-195-5p and LOXL2. In this study, we demonstrated that circ_0000228 showed a remarkable up-modulation in CC tissues and cell lines. Circ_0000228 knockdown repressed the growth and metastatic potential of CC cells. Mechanistically, circ_0000228 facilitated CC progression through sponging miR-195-5p and up-modulating LOXL2 expression. We conclude that circ_0000228 is an oncogenic circRNA, which participates in promoting CC progression via regulating the miR-195-5p/LOXL2 axis.
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Affiliation(s)
- Shimei Liu
- Department of Obstetrics and Gynecology, The Third People's Hospital of Linyi, Linyi, Shandong, China
| | - Bingqing Li
- Department of Obstetrics and Gynecology, The Third People's Hospital of Linyi, Linyi, Shandong, China
| | - Ying Li
- Department of Obstetrics and Gynecology, The Third People's Hospital of Linyi, Linyi, Shandong, China
| | - Huaihua Song
- Department of Obstetrics and Gynecology, The Third People's Hospital of Linyi, Linyi, Shandong, China
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Zhang B, Chen M, Cao J, Liang Y, Tu T, Hu J, Li T, Cai Y, Li S, Liu B, Xu J, Liang B, Ye X, Cai X. An integrated electrochemical POCT platform for ultrasensitive circRNA detection towards hepatocellular carcinoma diagnosis. Biosens Bioelectron 2021; 192:113500. [PMID: 34280653 DOI: 10.1016/j.bios.2021.113500] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/09/2021] [Accepted: 07/11/2021] [Indexed: 02/06/2023]
Abstract
Hepatocellular carcinoma (HCC) is the fourth leading cause of cancer-related death. Circ-CDYL, one of the circular RNAs (circRNAs), is recognized as an independent marker for HCC early diagnosis. Point-of-care testing (POCT) of circRNA is essential and in great demand for clinical applications. Herein, we report a fully integrated electrochemical POCT platform for circRNA detection based on Au nanoflowers (AuNFs)/peptide nucleic acid (PNA) modified carbon-fiber microelectrode (CFME). PNA is applied as the recognition element, highly specified for a back-splice junction of circRNA. AuNFs increased active site for PNA probes, improving target-capturing efficiency at an ultralow level. The platform provides a linear range of 10 fM to 1 μM, with a detection limit as low as 3.29 fM. This biosensor demonstrates high specificity towards one-base mismatch and is stable for up to 24 days. The analytical performance has also been verified in human serum samples, demonstrating the potential utility in clinical POCT applications for HCC.
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Affiliation(s)
- Bin Zhang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Mingyu Chen
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Jiasheng Cao
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Yitao Liang
- Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China
| | - Tingting Tu
- Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China
| | - Jiahao Hu
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Tianyu Li
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China; Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China
| | - Yu Cai
- Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China
| | - Shijie Li
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Boqiang Liu
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Junjie Xu
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Bo Liang
- Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China.
| | - Xuesong Ye
- Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China; Key Laboratory of Laparoscopic Technique Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
| | - Xiujun Cai
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China; Key Laboratory of Laparoscopic Technique Research of Zhejiang Province, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China; Zhejiang Minimal Invasive Diagnosis and Treantment Thechnology Research Center of Severe Hepatobiliary Disease, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China; Zhejiang Research and Development Engineering Laboratory of Minimally Invasive Technology and Equipment, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
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Wang Y, Chen H, Wei X. Circ_0007142 downregulates miR-874-3p-mediated GDPD5 on colorectal cancer cells. Eur J Clin Invest 2021; 51:e13541. [PMID: 33797091 DOI: 10.1111/eci.13541] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 03/05/2021] [Accepted: 03/10/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND Ferroptosis is an iron-dependent and oxidative cell death form. Recent studies suggested that circular RNAs (circRNAs) regulated ferroptosis in tumour cells. Circ_0007142 was identified as a carcinogenic molecule in colorectal cancer (CRC), but its function on ferroptosis in CRC remains unknown. METHODS Circ_0007142, microRNA-874-3p (miR-874-3p) and glycerophosphodiester phosphodiesterase domain containing 5 (GDPD5) levels were assayed using the quantitative real-time polymerase chain reaction (qRT-PCR). Cell survival and proliferation were measured by Cell Counting Kit-8 (CCK-8) assay. Protein detection was performed by Western blot. Cell apoptosis was analysed by flow cytometry. Ferroptosis was assessed by iron accumulation and oxidative stress. Target binding was evaluated by dual-luciferase reporter assay. In vivo research was conducted by tumour xenograft in mice. RESULTS Circ_0007142 was overexpressed in CRC. After expression inhibition of circ_0007142, proliferation was reduced, while apoptosis and ferroptosis were facilitated in CRC cells. Mechanically, circ_0007142 was found as a miR-874-3p sponge and miR-874-3p inhibitor eliminated the regulation of si-circ_0007142 in CRC cells. MiR-874-3p targeted GDPD5 and upregulation of GDPD5 reversed the miR-874-3p-triggered tumour inhibition and ferroptosis promotion in CRC cells. Moreover, GDPD5 was regulated by the circ_0007142/miR-874-3p axis. Circ_0007142 also affected CRC tumorigenesis in vivo through the regulation of miR-874-3p and GDPD5. CONCLUSION All these findings proved that circ_0007142/miR-874-3p/GDPD5 axis regulated tumorigenesis and ferroptosis of CRC cells. Circ_0007142 might be an available marker for ferroptosis in CRC therapy.
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Affiliation(s)
- Yueqing Wang
- Department of Proctology, Jining Hospital of Traditional Chinese Medicine, Jining, China
| | - Hongshu Chen
- Department of Gastroenterology, Yidu Central Hospital of Weifang, Weifang, China
| | - Xueling Wei
- Department of General Medicine, Jinan Central Hospital (Jinan Central Hospital Affiliated to Shandong University), Jinan, China
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Geng J, Yang K. circCCND1 Regulates Oxidative Stress and FGF9 to Enhance Chemoresistance of Non-Small Cell Lung Cancer via Sponging miR-187-3p. DNA Cell Biol 2021; 40:675-682. [PMID: 33733860 DOI: 10.1089/dna.2020.6412] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Circular RNAs have been shown to regulate cancer tumorigenesis and drug resistance. Recently, circCCND1 is reported to promote laryngeal squamous cell carcinoma; however, whether circCCND1 is implicated in non-small cell lung cancer (NSCLC) remains unclear. In this research, The Cancer Genome Atlas data of lung adenocarcinoma were analyzed to show gene expression and overall survival. 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di- phenytetrazoliumromide assay and cell colony formation assay were utilized to measure cell viability and proliferation of A549 and HCC827. Apoptosis was detected by TdT-mediated dUTP Nick-End Labeling assay. Besides, reverse transcription-quantitative PCR was used to examine gene expression. We observed that circCCND1 was significantly upregulated in lung cancer cells and patients. circCCND1 knockdown attenuated cell proliferation and induced apoptosis under cisplatin treatment. Mechanistically, circCCND1 interacted with miR-187-3p to regulate reactive oxygen species and FGF9 in NSCLC cells. Finally, miR-187-3p was demonstrated to rescue circCCND1 knockdown-modulated chemoresistance of NSCLC cells. In this study, our conclusions facilitate the understanding of NSCLC drug resistance to cisplatin.
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Affiliation(s)
- Jiqun Geng
- Department of Thoracic Surgery, and Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Kaihua Yang
- Department of Radiotherapy, Affiliated Hospital of Jiangnan University, Wuxi, China
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Qian C, Chen S, Li S, Wang Y, Yao J. Circ_0000003 regulates glutamine metabolism and tumor progression of tongue squamous cell carcinoma via the miR‑330‑3p/GLS axis. Oncol Rep 2021; 45:45. [PMID: 33649795 PMCID: PMC7934215 DOI: 10.3892/or.2021.7996] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/10/2021] [Indexed: 02/06/2023] Open
Abstract
Various circular RNAs (circRNAs) have been shown to exert vital functions in tongue squamous cell carcinoma (TSCC). However, their roles in TSCC progression remain to be elucidated. This research aimed to investigate the role and mechanism of hsa_circ_0000003 (circ_0000003) in TSCC progression. Here, we found that circ_0000003 expression was upregulated in TSCC tissues and cell lines, and high circ_0000003 expression was correlated with advanced TNM stage, increased tumor size and poor patient survival. Circ_0000003 was revealed to facilitate cell proliferation, migration and invasion of TSCC cells. Mechanistically, we found that circ_0000003 acted as a competing endogenous RNA (ceRNA) that sponged miR‑330‑3p, thereby elevating glutaminase (GLS) expression. Accordingly, cell invasion, migration, glutamine consumption, α‑ketoglutarate (α‑KG) production and ATP production were significantly decreased by circ_0000003 knockdown in TSCC cells, and these effects were reversed by miR‑330‑3p inhibition. In conclusion, circ_0000003 facilitates TSCC cell proliferation, migration, invasion and glutamine catabolism by regulating the miR‑330‑3p/GLS pathway.
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Affiliation(s)
- Cuijuan Qian
- School of Medicine, Taizhou University, Taizhou, Zhejiang 318000, P.R. China
| | - Shihang Chen
- School of Medicine, Taizhou University, Taizhou, Zhejiang 318000, P.R. China
| | - Sen Li
- School of Medicine, Taizhou University, Taizhou, Zhejiang 318000, P.R. China
| | - Yichao Wang
- Department of The Medical Laboratory, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, Zhejiang 318000, P.R. China
| | - Jun Yao
- School of Medicine, Taizhou University, Taizhou, Zhejiang 318000, P.R. China
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Zhou J, Wang B, Bin X, Xie C, Li B, Liu O, Tang Z. CircHIPK3: Key Player in Pathophysiology and Potential Diagnostic and Therapeutic Tool. Front Med (Lausanne) 2021; 8:615417. [PMID: 33693013 PMCID: PMC7937734 DOI: 10.3389/fmed.2021.615417] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 02/02/2021] [Indexed: 12/21/2022] Open
Abstract
A large number of studies in China and other countries have confirmed that circularHIPK3 (circHIPK3) plays an important role in the pathophysiological processes of various diseases. Through the action of sponge miRNA (miR), circHIPK3 regulates cell proliferation, differentiation, and migration, and plays a key role in disease processes. By referring to a large number of research reports, this article explores the specific functional role of circHIPK3 in fibrotic diseases, cancer, and other diseases. This review aims to clarify the role of circHIPK3 in disease processes in order to aid further studies into the specific pathogenesis and clinical diagnosis of various diseases and provide new ideas for treatments.
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Affiliation(s)
- Jiang Zhou
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
| | - Baisheng Wang
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
| | - Xin Bin
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
| | - Changqing Xie
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
| | - Bo Li
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
| | - Ousheng Liu
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
| | - Zhangui Tang
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, China
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The Expanding Regulatory Mechanisms and Cellular Functions of Long Non-coding RNAs (lncRNAs) in Neuroinflammation. Mol Neurobiol 2021; 58:2916-2939. [PMID: 33555549 DOI: 10.1007/s12035-020-02268-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 12/16/2020] [Indexed: 12/13/2022]
Abstract
LncRNAs have emerged as important regulatory molecules in biological processes. They serve as regulators of gene expression pathways through interactions with proteins, RNA, and DNA. LncRNA expression is altered in several diseases of the central nervous system (CNS), such as neurodegenerative disorders, stroke, trauma, and infection. More recently, it has become clear that lncRNAs contribute to regulating both pro-inflammatory and anti-inflammatory pathways in the CNS. In this review, we discuss the molecular pathways involved in the expression of lncRNAs, their role and mechanism of action during gene regulation, cellular functions, and use of lncRNAs as therapeutic targets during neuroinflammation in CNS disorders.
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Puckett DL, Alquraishi M, Chowanadisai W, Bettaieb A. The Role of PKM2 in Metabolic Reprogramming: Insights into the Regulatory Roles of Non-Coding RNAs. Int J Mol Sci 2021; 22:1171. [PMID: 33503959 PMCID: PMC7865720 DOI: 10.3390/ijms22031171] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 01/17/2023] Open
Abstract
Pyruvate kinase is a key regulator in glycolysis through the conversion of phosphoenolpyruvate (PEP) into pyruvate. Pyruvate kinase exists in various isoforms that can exhibit diverse biological functions and outcomes. The pyruvate kinase isoenzyme type M2 (PKM2) controls cell progression and survival through the regulation of key signaling pathways. In cancer cells, the dimer form of PKM2 predominates and plays an integral role in cancer metabolism. This predominance of the inactive dimeric form promotes the accumulation of phosphometabolites, allowing cancer cells to engage in high levels of synthetic processing to enhance their proliferative capacity. PKM2 has been recognized for its role in regulating gene expression and transcription factors critical for health and disease. This role enables PKM2 to exert profound regulatory effects that promote cancer cell metabolism, proliferation, and migration. In addition to its role in cancer, PKM2 regulates aspects essential to cellular homeostasis in non-cancer tissues and, in some cases, promotes tissue-specific pathways in health and diseases. In pursuit of understanding the diverse tissue-specific roles of PKM2, investigations targeting tissues such as the kidney, liver, adipose, and pancreas have been conducted. Findings from these studies enhance our understanding of PKM2 functions in various diseases beyond cancer. Therefore, there is substantial interest in PKM2 modulation as a potential therapeutic target for the treatment of multiple conditions. Indeed, a vast plethora of research has focused on identifying therapeutic strategies for targeting PKM2. Recently, targeting PKM2 through its regulatory microRNAs, long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs) has gathered increasing interest. Thus, the goal of this review is to highlight recent advancements in PKM2 research, with a focus on PKM2 regulatory microRNAs and lncRNAs and their subsequent physiological significance.
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Affiliation(s)
- Dexter L. Puckett
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996, USA; (D.L.P.); (M.A.)
| | - Mohammed Alquraishi
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996, USA; (D.L.P.); (M.A.)
| | - Winyoo Chowanadisai
- Department of Nutrition, Oklahoma State University, Stillwater, OK 74078, USA;
| | - Ahmed Bettaieb
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996, USA; (D.L.P.); (M.A.)
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