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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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Wu Z, Wang B, Chen S, Zuo T, Zhang W, Cheng Z, Fu J, Gong J. Hsa_circ_0009096/miR-370-3p modulates hepatic stellate cell proliferation and fibrosis during biliary atresia pathogenesis. PeerJ 2024; 12:e17356. [PMID: 38766485 PMCID: PMC11100479 DOI: 10.7717/peerj.17356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 04/18/2024] [Indexed: 05/22/2024] Open
Abstract
Background Hepatic stellate cell (HSC) activation and hepatic fibrosis mediated biliary atresia (BA) development, but the underlying molecular mechanisms are poorly understood. This study aimed to investigate the roles of circRNA hsa_circ_0009096 in the regulation of HSC proliferation and hepatic fibrosis. Methods A cellular hepatic fibrosis model was established by treating LX-2 cells with transforming growth factor β (TGF-β1). RNaseR and actinomycin D assays were performed to detect hsa_circ_0009096 stability. Expression of hsa_circ_0009096, miR-370-3p, and target genes was detected using reverse transcription-qPCR. Direct binding of hsa_circ_0009096 to miR-370-3p was validated using dual luciferase reporter assay. Cell cycle progression and apoptosis of LX-2 cells were assessed using flow cytometry. The alpha-smooth muscle actin (α-SMA), collagen 1A1 (COL1A1), and TGF beta receptor 2 (TGFBR2) protein levels in LX-2 cells were analyzed using immunocytochemistry and western blotting. Results Hsa_circ_0009096 exhibited more resistance to RNase R and actinomycinD digestion than UTRN mRNA. Hsa_circ_0009096 expression increased significantly in LX-2 cells treated with TGF-β1, accompanied by elevated α-SMA and COL1A1 expression. Hsa_circ_0009096 siRNAs effectively promoted miR-370-3p and suppressed TGFBR2 expression in LX-2 cells, mediated by direct association of hsa_circ_0009096 with miR-370-3p. Hsa_circ_0009096 siRNA interfered with the cell cycle progression, promoted apoptosis, and reduced α-SMA and COL1A1 expression in LX-2 cells treated with TGF-β1. MiR-370-3p inhibitors mitigated the alterations in cell cycle progression, apoptosis, and α-SMA, COL1A1, and TGFBR2 expression in LX-2 cells caused by hsa_circ_0009096 siRNA. In conclusion, hsa_circ_0009096 promoted HSC proliferation and hepatic fibrosis during BA pathogenesis by accelerating TGFBR2 expression by sponging miR-370-3p.
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Affiliation(s)
- Zhouguang Wu
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Bin Wang
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Siqi Chen
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Taoyan Zuo
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Wenjie Zhang
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Zhen Cheng
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Jingru Fu
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
| | - Jiafeng Gong
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen, China
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Dai Y, Xu Q, Xia M, Chen C, Xiong X, Yang X, Wang W. Hsa_circ_0001615 downregulation inhibits esophageal cancer development through miR-142-5p/β-catenin. PeerJ 2024; 12:e17089. [PMID: 38464761 PMCID: PMC10921930 DOI: 10.7717/peerj.17089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 02/20/2024] [Indexed: 03/12/2024] Open
Abstract
Background Recent studies have found that circular RNAs (circRNAs) play important roles in tumorigenesis. This study aimed to determine the function and potential mechanisms of hsa_circ_0001615 in esophageal cancer. Methods Quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) was used to validate the expression of hsa_circ_0001615 and miR-142-5p. Subsequently, 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium salt, flow cytometry, clone formation, and transwell assays were used to assess the function of hsa_circ_0001615. Furthermore, qRT-PCR and Western blot analysis were used to verify cyclin D1, Bcl-2 associated X, B-cell lymphoma/leukemia gene-2, and β-catenin levels. Circular RNA Interactome was used to estimate the binding site between hsa_circ_0001615 and miR-142-5p. Additionally, dual-luciferase reporter assays were used to determine whether miR-142-5p was a direct target of hsa_circ_0001615. Pearson correlation analysis was used to explore the relationship between miR-142-5p and hsa_circ_0001615. Results In esophageal cancer, the expressions of hsa_circ_0001615 and miR-142-5p were increased and decreased, respectively. Hsa_circ_0001615 inhibition significantly reduced the proliferation, migration, and invasion but increased the apoptosis of esophageal cancer cells. Additionally, hsa_circ_0001615 knockdown increased miR-142-5p expression but decreased β-catenin expression. MiR-142-5p was a direct target of hsa_circ_0001615. Conclusion Hsa_circ_0001615 knockdown could mediate antitumor effects through the miR-142-5p/β-catenin pathway.
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Affiliation(s)
- Yukai Dai
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
- Department of Thoracic Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qizhong Xu
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
| | - Manqi Xia
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
| | - Caimin Chen
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
| | - Xinming Xiong
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
- Department of Thoracic Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xin Yang
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
- Department of Thoracic Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wei Wang
- The Second Clinical College of Guangzhou Medical University, Guangzhou, China
- Department of Thoracic Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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Steger G, Riesner D, Prusiner SB. Viroids, Satellite RNAs and Prions: Folding of Nucleic Acids and Misfolding of Proteins. Viruses 2024; 16:360. [PMID: 38543726 PMCID: PMC10975798 DOI: 10.3390/v16030360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 02/22/2024] [Accepted: 02/23/2024] [Indexed: 05/23/2024] Open
Abstract
Theodor ("Ted") Otto Diener (* 28 February 1921 in Zürich, Switzerland; † 28 March 2023 in Beltsville, MD, USA) pioneered research on viroids while working at the Plant Virology Laboratory, Agricultural Research Service, USDA, in Beltsville. He coined the name viroid and defined viroids' important features like the infectivity of naked single-stranded RNA without protein-coding capacity. During scientific meetings in the 1970s and 1980s, viroids were often discussed at conferences together with other "subviral pathogens". This term includes what are now called satellite RNAs and prions. Satellite RNAs depend on a helper virus and have linear or, in the case of virusoids, circular RNA genomes. Prions, proteinaceous infectious particles, are the agents of scrapie, kuru and some other diseases. Many satellite RNAs, like viroids, are non-coding and exert their function by thermodynamically or kinetically controlled folding, while prions are solely host-encoded proteins that cause disease by misfolding, aggregation and transmission of their conformations into infectious prion isoforms. In this memorial, we will recall the work of Ted Diener on subviral pathogens.
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Affiliation(s)
- Gerhard Steger
- Institut für Physikalische Biologie, Faculty of Mathematics and Natural Sciences, Heinrich Heine University Düsseldorf, 40204 Düsseldorf, Germany;
| | - Detlev Riesner
- Institut für Physikalische Biologie, Faculty of Mathematics and Natural Sciences, Heinrich Heine University Düsseldorf, 40204 Düsseldorf, Germany;
| | - Stanley B. Prusiner
- Institute for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, CA 94158, USA;
- Department of Neurology, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, CA 94158, USA
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA 94158, USA
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Hoque P, Romero B, Akins RE, Batish M. Exploring the Multifaceted Biologically Relevant Roles of circRNAs: From Regulation, Translation to Biomarkers. Cells 2023; 12:2813. [PMID: 38132133 PMCID: PMC10741722 DOI: 10.3390/cells12242813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/02/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
CircRNAs are a category of regulatory RNAs that have garnered significant attention in the field of regulatory RNA research due to their structural stability and tissue-specific expression. Their circular configuration, formed via back-splicing, results in a covalently closed structure that exhibits greater resistance to exonucleases compared to linear RNAs. The distinctive regulation of circRNAs is closely associated with several physiological processes, as well as the advancement of pathophysiological processes in several human diseases. Despite a good understanding of the biogenesis of circular RNA, details of their biological roles are still being explored. With the steady rise in the number of investigations being carried out regarding the involvement of circRNAs in various regulatory pathways, understanding the biological and clinical relevance of circRNA-mediated regulation has become challenging. Given the vast landscape of circRNA research in the development of the heart and vasculature, we evaluated cardiovascular system research as a model to critically review the state-of-the-art understanding of the biologically relevant functions of circRNAs. We conclude the review with a discussion of the limitations of current functional studies and provide potential solutions by which these limitations can be addressed to identify and validate the meaningful and impactful functions of circRNAs in different physiological processes and diseases.
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Affiliation(s)
- Parsa Hoque
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA;
| | - Brigette Romero
- Department of Medical and Molecular Sciences, University of Delaware, Newark, DE 19716, USA;
| | - Robert E Akins
- Nemours Children’s Research, Nemours Children’s Health System, Wilmington, DE 19803, USA;
| | - Mona Batish
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA;
- Department of Medical and Molecular Sciences, University of Delaware, Newark, DE 19716, USA;
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