151
|
Di Timoteo G, Rossi F, Bozzoni I. Circular RNAs in cell differentiation and development. Development 2020; 147:147/16/dev182725. [PMID: 32839270 DOI: 10.1242/dev.182725] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In recent years, circular RNAs (circRNAs) - a novel class of RNA molecules characterized by their covalently closed circular structure - have emerged as a complex family of eukaryotic transcripts with important biological features. Besides their peculiar structure, which makes them particularly stable molecules, they have attracted much interest because their expression is strongly tissue and cell specific. Moreover, many circRNAs are conserved across eukaryotes, localized in particular subcellular compartments, and can play disparate molecular functions. The discovery of circRNAs has therefore added not only another layer of gene expression regulation but also an additional degree of complexity to our understanding of the structure, function and evolution of eukaryotic genomes. In this Review, we summarize current knowledge of circRNAs and discuss the possible functions of circRNAs in cell differentiation and development.
Collapse
Affiliation(s)
- Gaia Di Timoteo
- Department of Biology and Biotechnology Charles Darwin, Sapienza, University of Rome, Rome, Italy
| | - Francesca Rossi
- Department of Biology and Biotechnology Charles Darwin, Sapienza, University of Rome, Rome, Italy
| | - Irene Bozzoni
- Department of Biology and Biotechnology Charles Darwin, Sapienza, University of Rome, Rome, Italy .,Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome, Italy
| |
Collapse
|
152
|
Wei Z, Ran H, Yang C. CircRSF1 contributes to endothelial cell growth, migration and tube formation under ox-LDL stress through regulating miR-758/CCND2 axis. Life Sci 2020; 259:118241. [PMID: 32791147 DOI: 10.1016/j.lfs.2020.118241] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/30/2020] [Accepted: 08/06/2020] [Indexed: 12/19/2022]
Abstract
AIMS Compelling evidences demonstrate that informative RNAs play essential role in therapy of atherosclerosis. Here, we attempted to study the role of hsa_circ_0000345 (circRSF1) in endothelial cell damage through competing endogenous RNA pathway. MATERIALS AND METHODS Expression of circRSF1, miRNA-758-3p (miR-758) and cyclin D2 (CCND2) was detected using RT-qPCR and western blotting, and the cross-talk among them was identified using dual-luciferase reporter assay and RNA immunoprecipitation. The low-density lipoprotein cholesterol (LDL-C) level was measured with enzyme-linked immunosorbent assay. Cell growth was measured by MTS assay, flow cytometry and caspase-3 activity assay kit. Migration and tube formation were determined by scratch migration assay and tube formation assay, respectively. KEY FINDINGS CircRSF1 and CCND2 were downregulated, whereas miR-758 was upregulated in serum of patients with atherosclerosis and oxidized low-density lipoprotein (ox-LDL)-treated human aortic endothelial cells (HAECs). Moreover, levels of circRSF1, miR-758 and CCND2 were correlated with circulating LDL-C level. Restoring circRSF1 and silencing miR-758 could improve cell viability, tube formation and migration of HAECs under ox-LDL treatment, as well as attenuated apoptotic rate and caspase-3 activity. However, miR-758 upregulation counteracted the promotion of circRSF1 on cell growth, migration and tube formation in ox-LDL-induced HAECs; so did CCND2 deletion on effect of miR-758 silence. Notably, circRSF1 and CCND2 could competitively bound to miR-758, and circRSF1 positively regulated CCND2 expression via miR-758. SIGNIFICANCE CircRSF1 could protect against ox-LDL-induced endothelial cell injury in vitro via miR-758/CCND2 axis, suggesting circRSF1 as a potential target for the treatment of atherosclerosis.
Collapse
Affiliation(s)
- Zhenheng Wei
- Department of Cardiovascular Medicine, Zhoukou Central Hospital, Zhoukou, Henan, China.
| | - Huazhong Ran
- Department of Cardiovascular Medicine, Zhoukou Central Hospital, Zhoukou, Henan, China
| | - Chunhua Yang
- Department of Cardiovascular Medicine, Zhoukou Central Hospital, Zhoukou, Henan, China
| |
Collapse
|
153
|
Zhang J, Cai R, Zhang Y, Wang X. Involvement of a novel circularRNA, hsa_circ_0000520, attenuates tumorigenesis of cervical cancer cell through competitively binding with miR-146b-3p. J Cell Mol Med 2020; 24:8480-8490. [PMID: 32592222 PMCID: PMC7412397 DOI: 10.1111/jcmm.15414] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 04/14/2020] [Accepted: 04/22/2020] [Indexed: 02/06/2023] Open
Abstract
The implication of circular RNAs (circRNAs) in the pathogenesis of human cervical cancer (CC) has been demonstrated by numerous of researches, nevertheless, the whole regulatory network of circRNAs in CC remains unclear. In the present study, two GSE data sets (GSE113696 and GSE102686) were enrolled to analysed different expressed circRNA. We found that hsa_circ_0000520(circ_0000520) was decreased in CC tissues and cell lines. Functional studies indicated circ_0000520 overexpression in vitro repressed CC cell proliferation, invasion and migration, while promoted CC cell apoptosis. Moreover, circ_0000520 overexpression in vivo repressed CC tumour growth. Mechanismly, circ_0000520 and PAX5 were revealed to directly bind to miR-146b-3p, and circ_0000520 could indirectly regulate PAX5 by sponging miR-146b-3p. In conclusion, circ_0000520 repressed CC progression in vitro and in vivo by sponging miR-146b-3p to release PAX5.
Collapse
Affiliation(s)
- Jinling Zhang
- Department of GynaecologyShen Zhen People’s Hospitalthe Second Clinical Medical College of Jinan UniversityShenzhenChina
| | - Ruyu Cai
- Department of GynaecologyShen Zhen People’s Hospitalthe Second Clinical Medical College of Jinan UniversityShenzhenChina
| | - Yifan Zhang
- Department of GynaecologyShen Zhen People’s Hospitalthe Second Clinical Medical College of Jinan UniversityShenzhenChina
| | - Xiaoyu Wang
- Department of Gynaecologythe First Affiliated Hospital of Jinan UniversityGuangzhouChina
| |
Collapse
|
154
|
Characteristics of Circular RNA Expression Profiles of Porcine Granulosa Cells in Healthy and Atretic Antral Follicles. Int J Mol Sci 2020; 21:ijms21155217. [PMID: 32717899 PMCID: PMC7432752 DOI: 10.3390/ijms21155217] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/13/2020] [Accepted: 07/18/2020] [Indexed: 12/13/2022] Open
Abstract
Circular RNAs (circRNAs) are thought to play essential roles in multiple biological processes, including apoptosis, an important process in antral follicle atresia. We aimed to investigate the potential involvement of circRNAs in granulosa cell apoptosis and thus antral follicle atresia. CircRNA expression profiles were generated from porcine granulosa cells isolated from healthy antral (HA) and atretic antral (AA) follicles. Over 9632 circRNAs were identified, of which 62 circRNAs were differentially expressed (DE-circRNAs). Back-splicing, RNase R resistance, and stability of DE-circRNAs were validated, and miRNA binding sites and related target genes were predicted. Two exonic circRNAs with low false discovery rate (FDR) high fold change, miRNA binding sites, and relevant biological functions—circ_CBFA2T2 and circ_KIF16B—were selected for further characterization. qRT-PCR and linear regression analysis confirmed expression and correlation of the targeted genes—the antioxidant gene GCLC (potential target of circ_CBFA2T2) and the apoptotic gene TP53 (potential target of circ_KIF16B). Increased mRNA content of TP53 in granulosa cells of AA follicles was further confirmed by strong immunostaining of both p53 and its downstream target pleckstrin homology like domain family a member 3 (PHLDA3) in AA follicles compared to negligible staining in granulosa cells of HA follicles. Therefore, we concluded that aberrantly expressed circRNAs presumably play a potential role in antral follicular atresia.
Collapse
|
155
|
Guay C, Jacovetti C, Bayazit MB, Brozzi F, Rodriguez-Trejo A, Wu K, Regazzi R. Roles of Noncoding RNAs in Islet Biology. Compr Physiol 2020; 10:893-932. [PMID: 32941685 DOI: 10.1002/cphy.c190032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The discovery that most mammalian genome sequences are transcribed to ribonucleic acids (RNA) has revolutionized our understanding of the mechanisms governing key cellular processes and of the causes of human diseases, including diabetes mellitus. Pancreatic islet cells were found to contain thousands of noncoding RNAs (ncRNAs), including micro-RNAs (miRNAs), PIWI-associated RNAs, small nucleolar RNAs, tRNA-derived fragments, long non-coding RNAs, and circular RNAs. While the involvement of miRNAs in islet function and in the etiology of diabetes is now well documented, there is emerging evidence indicating that other classes of ncRNAs are also participating in different aspects of islet physiology. The aim of this article will be to provide a comprehensive and updated view of the studies carried out in human samples and rodent models over the past 15 years on the role of ncRNAs in the control of α- and β-cell development and function and to highlight the recent discoveries in the field. We not only describe the role of ncRNAs in the control of insulin and glucagon secretion but also address the contribution of these regulatory molecules in the proliferation and survival of islet cells under physiological and pathological conditions. It is now well established that most cells release part of their ncRNAs inside small extracellular vesicles, allowing the delivery of genetic material to neighboring or distantly located target cells. The role of these secreted RNAs in cell-to-cell communication between β-cells and other metabolic tissues as well as their potential use as diabetes biomarkers will be discussed. © 2020 American Physiological Society. Compr Physiol 10:893-932, 2020.
Collapse
Affiliation(s)
- Claudiane Guay
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Cécile Jacovetti
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Mustafa Bilal Bayazit
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Flora Brozzi
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Adriana Rodriguez-Trejo
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Kejing Wu
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Romano Regazzi
- Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland.,Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| |
Collapse
|
156
|
Beltrán-García J, Osca-Verdegal R, Nacher-Sendra E, Pallardó FV, García-Giménez JL. Circular RNAs in Sepsis: Biogenesis, Function, and Clinical Significance. Cells 2020; 9:cells9061544. [PMID: 32630422 PMCID: PMC7349763 DOI: 10.3390/cells9061544] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 01/08/2023] Open
Abstract
Sepsis is a life-threatening condition that occurs when the body responds to an infection that damages it is own tissues. The major problem in sepsis is rapid, vital status deterioration in patients, which can progress to septic shock with multiple organ failure if not properly treated. As there are no specific treatments, early diagnosis is mandatory to reduce high mortality. Despite more than 170 different biomarkers being postulated, early sepsis diagnosis and prognosis remain a challenge for clinicians. Recent findings propose that circular RNAs (circRNAs) may play a prominent role in regulating the patients’ immune system against different pathogens, including bacteria and viruses. Mounting evidence also suggests that the misregulation of circRNAs is an early event in a wide range of diseases, including sepsis. Despite circRNA levels being altered in sepsis, the specific mechanisms controlling the dysregulation of these noncoding RNAs are not completely elucidated, although many factors are known to affect circRNA biogenesis. Therefore, there is a need to explore the molecular pathways that lead to this disorder. This review describes the role of this new class of regulatory RNAs in sepsis and the feasibility of using circRNAs as diagnostic biomarkers for sepsis, opening up new avenues for circRNA-based medicine.
Collapse
Affiliation(s)
- Jesús Beltrán-García
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain; (J.B.-G.); (F.V.P.)
- Instituto de Investigación Sanitaria INCLIVA, 46010 Valencia, Spain;
- Departamento de Fisiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain;
| | - Rebeca Osca-Verdegal
- Instituto de Investigación Sanitaria INCLIVA, 46010 Valencia, Spain;
- Departamento de Fisiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain;
| | - Elena Nacher-Sendra
- Departamento de Fisiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain;
| | - Federico V. Pallardó
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain; (J.B.-G.); (F.V.P.)
- Instituto de Investigación Sanitaria INCLIVA, 46010 Valencia, Spain;
- Departamento de Fisiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain;
| | - José Luis García-Giménez
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain; (J.B.-G.); (F.V.P.)
- Instituto de Investigación Sanitaria INCLIVA, 46010 Valencia, Spain;
- Departamento de Fisiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain;
- Correspondence:
| |
Collapse
|
157
|
Non-coding RNAs in Ischemic Stroke: Roles in the Neuroinflammation and Cell Death. Neurotox Res 2020; 38:564-578. [DOI: 10.1007/s12640-020-00236-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/10/2020] [Accepted: 06/07/2020] [Indexed: 12/11/2022]
|
158
|
Ma J, Qi G, Li L. A Novel Serum Exosomes-Based Biomarker hsa_circ_0002130 Facilitates Osimertinib-Resistance in Non-Small Cell Lung Cancer by Sponging miR-498. Onco Targets Ther 2020; 13:5293-5307. [PMID: 32606748 PMCID: PMC7293392 DOI: 10.2147/ott.s243214] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/15/2020] [Indexed: 12/15/2022] Open
Abstract
Purpose Exosomes are the effective delivery system for biological compounds, including circular RNAs. In this research, we aimed to explore the role of circular RNA hsa_circRNA_0002130 in osimertinib-resistant non-small cell lung cancer (NSCLC). Materials and Methods In our study, the relative protein expression of glucose transporter 1 (GLUT1), hexokinase-2 (HK2) and lactate dehydrogenase A (LDHA) was detected by Western blot, while the expression of hsa_circ_0002130 and microRNA-498 (miR-498) was detected by quantitative real-time PCR (qRT-PCR). The biological functions of hsa_circ_0002130 in osimertinib-resistant NSCLC were analyzed by cell viability assay, flow cytometry analysis, luciferase reporter assay, RNA pull-down assay, and tumor xenograft model in vivo. Moreover, glucose uptake, lactate production and extracellular acidification (ECAR) levels were measured by glucose uptake colorimetric assay kit, lactate assay kit II, and Seahorse Extracellular Flux Analyzer XF96 assay, respectively. hsa_circ_0002130 identification and localization were confirmed by RNase R digestion and subcellular localization assay, respectively. Exosomes were isolated from the sera collected from NSCLC patients and identified using a transmission electron microscopy and nanoparticle tracking analysis. Results Osimertinib-resistance was closely related to glycolysis. hsa_circ_0002130 was highly expressed in osimertinib-resistant NSCLC cells and hsa_circ_0002130 deletion inhibited osimertinib-resistance both in vitro and in vivo. Moreover, hsa_circ_0002130 targeted miR-498 to regulate GLUT1, HK2 and LDHA. The inhibitory effects of hsa_circ_0002130 deletion on osimertinib-resistant were reversed by downregulating miR-498. Importantly, hsa_circ_0002130 was upregulated in serum exosomes from osimertinib-resistant NSCLC patients. Conclusion Our findings confirmed that hsa_circ_0002130 served as a promotion role in osimertinib-resistant NSCLC.
Collapse
Affiliation(s)
- Jing Ma
- Department of Respiratory and Critical Medicine, Huaihe Hospital of Henan University, Kaifeng, Henan, People's Republic of China
| | - Guanbin Qi
- Department of Respiratory and Critical Medicine, Huaihe Hospital of Henan University, Kaifeng, Henan, People's Republic of China
| | - Lei Li
- Department of Respiratory and Critical Medicine, Huaihe Hospital of Henan University, Kaifeng, Henan, People's Republic of China
| |
Collapse
|
159
|
Circular RNAs: Promising Molecular Biomarkers of Human Aging-Related Diseases via Functioning as an miRNA Sponge. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2020; 18:215-229. [PMID: 32637451 PMCID: PMC7326721 DOI: 10.1016/j.omtm.2020.05.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Circular RNAs (circRNAs) are a new class of noncoding single-stranded RNAs that differ from linear microRNAs (miRNAs), since they form covalently closed loop structures without free 3′ poly(A) tails or 5′ caps. circRNAs are the competitive endogenous RNAs (ceRNAs) by binding to miRNA through miRNA response elements (MREs) (i.e., “miRNA sponge”), thereby reducing the quantity of miRNA available to target mRNA, subsequently promoting mRNA stability or protein expression, which involves the initiation and progress of human diseases. Owing to these features of abundance, stability, conservative property, and tissue and stage specificity, widely distributing in the extracellular space and in various bodily fluids, circRNAs can be considered as potential biomarkers for various diseases. Here, we reviewed the promising circRNAs being disease biomarkers, focused on their regulatory function by acting as miRNA sponges, and described their roles in cancer, cardiovascular or neurodegenerative diseases, osteoarthritis, rheumatoid arthritis, diabetes, and other human aging-related diseases, which provide a new direction for pathogenesis, diagnosis, and treatment of human aging-related diseases.
Collapse
|
160
|
Abramowicz A, Story MD. The Long and Short of It: The Emerging Roles of Non-Coding RNA in Small Extracellular Vesicles. Cancers (Basel) 2020; 12:cancers12061445. [PMID: 32498257 PMCID: PMC7352322 DOI: 10.3390/cancers12061445] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/28/2020] [Accepted: 05/29/2020] [Indexed: 12/21/2022] Open
Abstract
Small extracellular vesicles (EVs) play a significant role in intercellular communication through their non-coding RNA (ncRNA) cargo. While the initial examination of EV cargo identified both mRNA and miRNA, later studies revealed a wealth of other types of EV-related non-randomly packed ncRNAs, including tRNA and tRNA fragments, Y RNA, piRNA, rRNA, and lncRNA. A number of potential roles for these ncRNA species were suggested, with strong evidence provided in some cases, whereas the role for other ncRNA is more speculative. For example, long non-coding RNA might be used as a potential diagnostic tool but might also mediate resistance to certain cancer-specific chemotherapy agents. piRNAs, on the other hand, have a significant role in genome integrity, however, no role has yet been defined for the piRNAs found in EVs. While our knowledgebase for the function of ncRNA-containing EVs is still modest, the potential role that these EV-ensconced ncRNA might play is promising. This review summarizes the ncRNA content of EVs and describes the function where known, or the potential utility of EVs that harbor specific types of ncRNA.
Collapse
Affiliation(s)
- Agata Abramowicz
- Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice Branch, 44-102 Gliwice, Poland;
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Michael D Story
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Correspondence:
| |
Collapse
|
161
|
Hallajzadeh J, Amirani E, Mirzaei H, Shafabakhsh R, Mirhashemi SM, Sharifi M, Yousefi B, Mansournia MA, Asemi Z. Circular RNAs: new genetic tools in melanoma. Biomark Med 2020; 14:563-571. [PMID: 32462914 DOI: 10.2217/bmm-2019-0567] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Melanoma is the most lethal form of skin cancer. New technologies have resulted in major advances in the diagnosis and treatment of melanoma and other cancer types. Recently, some studies have investigated the role of circular RNAs (circRNAs) in different cancers. CircRNAs are a member of long noncoding RNA family mainly formed through back-splicing and have a closed-loop structure. These molecules affect several biological and oncogenic cascades in diverse ways via acting as microRNA sponge, interacting with RNA-binding proteins and acting as a transcription regulator. In this review, we made an insight into the impact of circRNA dysregulation in the melanoma tumorigenesis based on the presented evidences.
Collapse
Affiliation(s)
- Jamal Hallajzadeh
- Department of Biochemistry & Nutrition, Research Center for Evidence-Based Health Management, Maragheh University of Medical Sciences, Maragheh, Iran
| | - Elaheh Amirani
- Research Center for Biochemistry & Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Hamed Mirzaei
- Research Center for Biochemistry & Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Rana Shafabakhsh
- Research Center for Biochemistry & Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Seyyed M Mirhashemi
- Metabolic Diseases Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Mehran Sharifi
- Department of Hematology & Oncology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Bahman Yousefi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad A Mansournia
- Department of Epidemiology & Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Zatollah Asemi
- Research Center for Biochemistry & Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| |
Collapse
|
162
|
FANG J, PAN Z, GUO X. [Research advance of ANRIL on atherosclerosis by regulating cell proliferation and apoptosis]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2020; 49:113-117. [PMID: 32621415 PMCID: PMC8800783 DOI: 10.3785/j.issn.1008-9292.2020.02.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 02/20/2020] [Indexed: 06/11/2023]
Abstract
Atherosclerosis is an important pathological basis for coronary artery disease. ANRIL is an antisense non-coding RNA located in Chr9p21 locus, which was identified as the most significant risk locus associated with atherosclerosis. ANRIL can produce multiple transcripts including linear and circular transcripts after various transcript splicing. It has been illustrated that ANRIL plays important roles in the pathology of atherosclerosis by regulating the proliferation and apoptosis of vascular cells. Linear ANRIL can regulate the proliferation of vascular smooth muscle cells (VSMCs) in plaques by chromatin modification, as well as influence the proliferation and the apoptosis of macrophages in post transcription; circular ANRIL can affect the proliferation and apoptosis of VSMCs by chromatin modification as well as interfering with rRNA maturation. In this review, we describe the ANRIL evolution, different transcripts characteristics, and their roles in the proliferation and apoptosis of vascular cells to participate in the process of atherosclerosis, for further understanding the pathogenesis of atherosclerosis and finding potential targets for diagnosis and treatment of atherosclerosis.
Collapse
|
163
|
Liang ZZ, Guo C, Zou MM, Meng P, Zhang TT. circRNA-miRNA-mRNA regulatory network in human lung cancer: an update. Cancer Cell Int 2020; 20:173. [PMID: 32467668 PMCID: PMC7236303 DOI: 10.1186/s12935-020-01245-4] [Citation(s) in RCA: 126] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 05/07/2020] [Indexed: 02/07/2023] Open
Abstract
Circular RNAs, as hopeful diagnosis markers and therapeutic molecules, have been studied, probed and applied into several diseases, such as cardiovascular diseases, systemic lupus erythematosus, leukemia, pulmonary tuberculosis, and cancer especially. Recently, mounting evidence has supported that circRNAs play a key role in the tumorigenesis, progress, invasion and metastasis in lung cancer. Its special structure—3′–5′ covalent loop—allow it to execute several special functions in both normal eukaryotic cells and cancer cells. Our review summaries the latest studies on characteristics and biogenesis of circRNAs, and highlight the regulatory functions about miRNA sponge of lung-cancer-related circRNAs. In addition, the interaction of the circRNA-miRNA-mRNA regulatory network will also be elaborated in detail in this review. Therefore, this review can provide a new idea or strategy for further development and application in clinical setting in terms of early-diagnosis and better treatment.
Collapse
Affiliation(s)
- Zhuo-Zheng Liang
- 1Department of Pulmonary Diseases, The Third Affiliated Hospital of Sun Yat-sen University, Institute of Respiratory Diseases of Sun Yat-sen University, 600 Tianhe Road, Guangzhou, 510630 China
| | - Cheng Guo
- 2Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Man-Man Zou
- 1Department of Pulmonary Diseases, The Third Affiliated Hospital of Sun Yat-sen University, Institute of Respiratory Diseases of Sun Yat-sen University, 600 Tianhe Road, Guangzhou, 510630 China
| | - Ping Meng
- 1Department of Pulmonary Diseases, The Third Affiliated Hospital of Sun Yat-sen University, Institute of Respiratory Diseases of Sun Yat-sen University, 600 Tianhe Road, Guangzhou, 510630 China
| | - Tian-Tuo Zhang
- 1Department of Pulmonary Diseases, The Third Affiliated Hospital of Sun Yat-sen University, Institute of Respiratory Diseases of Sun Yat-sen University, 600 Tianhe Road, Guangzhou, 510630 China
| |
Collapse
|
164
|
Li C, Fu X, He H, Chen C, Wang Y, He L. The Biogenesis, Functions, and Roles of circRNAs in Bladder Cancer. Cancer Manag Res 2020; 12:3673-3689. [PMID: 32547204 PMCID: PMC7245432 DOI: 10.2147/cmar.s245233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 04/16/2020] [Indexed: 01/16/2023] Open
Abstract
Bladder cancer (BCa) is the 10th most prevalent malignancy worldwide and remains a crucial cause of cancer-related morbidity and mortality. Circular RNAs (circRNAs), a large class of endogenous non-coding RNAs, contain unique covalent closed structures and their biogenesis and turnover are regulated by multiple factors. Recently, multiple circRNAs have been found to serve as important factors in several biological processes such as tumorigenesis. An increasing amount of research discovered that circRNAs are dysregulated in multiple cancer tissues compared with matched normal tissues, especially in BCa, indicating that circRNAs can act as biomarkers for the diagnosis and prognosis of BCa. In this review, we focus on the biogenesis, properties, turnover, and functions of circRNAs, summarizing their potential functions and clinical implications in BCa.
Collapse
Affiliation(s)
- Changjiu Li
- Department of Urology, Affiliated Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Xian Fu
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Huadong He
- Department of Urology, Affiliated Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Chao Chen
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Yuyong Wang
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| | - Lugeng He
- Department of Urology, Affiliated Hangzhou First People's Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, People's Republic of China
| |
Collapse
|
165
|
Zhou DN, Ye CS, Deng YF. CircRNAs: potency of protein translation and feasibility of novel biomarkers and therapeutic targets for head and neck cancers. Am J Transl Res 2020; 12:1535-1552. [PMID: 32509160 PMCID: PMC7270011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
Circular RNAs (circRNAs), a new star noncoding RNA (ncRNA), show stability, conservation, abundance, and tissue and stage specificity. They act as key regulators of biological processes. They target the mRNAs of many other different genes or signaling pathways, and closely link associated genes into regulatory networks. Growing evidence has demonstrated that circRNAs may play an important role in the carcinogenesis, progression and chemoradiation resistance of many cancers including head and neck cancers (HNC). CircRNA, like other ncRNA, such as miRNA, lncRNA, usually is considered to be non-protein coding transcript. However, recent studies indicated that abnormal translation of circRNAs may be involved in human diseases. In this review, we collected the origin, classification, characteristics, function of circRNAs, exosmal circRNAs, and then synthesize current study results to highlight aberration of circRNAs in various types of HNC, and try to clarify the molecular mechanisms of circRNAs affecting the pathogenesis and progression of HNC, as well as pay particular attention to provide a new avenue to the diagnosis and treatment strategy for HNC.
Collapse
Affiliation(s)
- Dong-Ni Zhou
- Department of Pathology, Zhongshan Hospital, Xiamen University209 Hubin South Road, Xiamen 361004, Fujian, China
| | - Chun-Sheng Ye
- Department of Otolaryngology-Head and Neck Surgery, Zhongshan Hospital, Xiamen University209 Hubin South Road, Xiamen 361004, Fujian, China
| | - Yan-Fei Deng
- Department of Otolaryngology-Head and Neck Surgery, Zhongshan Hospital, Xiamen University209 Hubin South Road, Xiamen 361004, Fujian, China
- Union School of Clinical Medicine, Fujian Medical UniversityFuzhou 350001, Fujian, China
| |
Collapse
|
166
|
Liu J, Dai X, Guo X, Cheng A, Mac SM, Wang Z. Circ-OXCT1 Suppresses Gastric Cancer EMT and Metastasis by Attenuating TGF-β Pathway Through the Circ-OXCT1/miR-136/SMAD4 Axis. Onco Targets Ther 2020; 13:3987-3998. [PMID: 32523351 PMCID: PMC7236241 DOI: 10.2147/ott.s239789] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 04/28/2020] [Indexed: 12/24/2022] Open
Abstract
Background Circular RNAs (circRNAs) have been proven to play important roles in tumorigenesis. However, the mechanism by which circRNAs act on gastric cancer (GC) through epithelial-to-mesenchymal transition (EMT) is unclear. In this study, we identified circ-OXCT1 and elucidated its function on EMT in GC. Methods Tissue circRNA microarray analysis and qRT-PCR were utilized to determine the expression level of circ-OXCT1 in GC. Luciferase reporter assay and FISH were employed to confirm the interaction between circ-OXCT1 and miR-136. CCK-8, cloning formation, transwell, wound healing, nude mice experiment, circ-OXCT1 overexpression and silencing were conducted to elucidate the function of circ-OXCT1 in vivo and in vitro. Western blot and rescue experiment were carried out to evaluate the changes of EMT-related proteins induced by circ-OXCT1 overexpression or silencing. Results Circ-OXCT1 was downregulated in GC tissues and cell lines. Its expression level was significantly associated with lymph node metastasis, pathologic stage and overall survival rate through clinicopathologic data analysis. Circ-OXCT1 silencing downregulated SMAD4 expression and accordingly regulated expression of E-cadherin, N-cadherin and vimentin through the transforming growth factor-beta (TGF-β)/Smad signaling pathway by a circ-OXCT1/miR-136/SMAD4 axis, resulting in enhancement of EMT and subsequent boost of cell migration, invasion and nude mice lung metastasis. Conclusion Our data showed that circ-OXCT1 suppresses gastric cancer EMT and metastasis through TGF-β/Smad signaling pathway. The clinicopathologic data analysis revealed that circ-OXCT1 overexpression could be a novel treatment for advanced GC especially with distant metastasis by targeting the circ-OXCT1/miR-136/SMAD4 axis.
Collapse
Affiliation(s)
- Jianjun Liu
- Department of Gastrointestinal Surgery, Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Xinglong Dai
- Department of Gastrointestinal Surgery, Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Xiong Guo
- Department of Gastrointestinal Surgery, Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Anqi Cheng
- Department of Gastrointestinal Surgery, Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Sandrie Mariella Mac
- Department of Gastrointestinal Surgery, Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Ziwei Wang
- Department of Gastrointestinal Surgery, Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| |
Collapse
|
167
|
Wang S, Zhan J, Lin X, Wang Y, Wang Y, Liu Y. CircRNA-0077930 from hyperglycaemia-stimulated vascular endothelial cell exosomes regulates senescence in vascular smooth muscle cells. Cell Biochem Funct 2020; 38:1056-1068. [PMID: 32307741 DOI: 10.1002/cbf.3543] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 03/22/2020] [Accepted: 03/29/2020] [Indexed: 01/14/2023]
Abstract
Vascular smooth muscle aging leads to diabetic complications such as cardiovascular and kidney diseases or diabetic foot. Therefore, understanding the mechanism of smooth muscle cell senescence in a high-glucose (HG) environment is essential. The purpose of this study was to determine whether and how circRNA from human umbilical vein endothelial cell exosomes (HUVEC-Exos) under HG conditions regulates the senescence of vascular smooth muscle cells (VSMCs). Combining circRNA array analysis and bioinformatics, we postulated that the circRNA-0077930-miR-622-Kras CeRNA network plays an important role in inducing senescence in VSMCs. CircRNA-0077930 transmitted by HG-HUVEs-Exos induced senescence of VSMCs by down-regulation of miR-622 expression and up-regulation of Kras, p21, p53 and p16 expression. Moreover, the lactate dehydrogenase (LDH) activity was significantly increased while anti-oxidative stress marker (superoxide dismutase, SOD) activity was reduced in HG-HUVEC-Exos treatment VSMCs. Finally, HG-HUVEC-Exos with depleted-circRNA-0077930 is no longer able to induce cellular senescence in VSMCs. These findings provided a new light on the effective treatment of VSMC senescence. SIGNIFICANCE OF THE STUDY: Previous studies have shown that endothelial cell senescence is closely related to smooth muscle cell aging. Here, for the first time, we proved that the HG-HUVECs derived exosomes induced the VSMCs senescence by circRNA0077930-miR622-Kras CeRNA network. The circRNA-0077930-depleted exosomes would lose the ability to promote cellular senescence of VSMCs.
Collapse
Affiliation(s)
- Sha Wang
- Department of Geriatrics, Institute of Aging and Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Junkun Zhan
- Department of Geriatrics, Institute of Aging and Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiao Lin
- Department of Geriatrics, Institute of Aging and Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yanjiao Wang
- Department of Geriatrics, Institute of Aging and Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yi Wang
- Department of Geriatrics, Institute of Aging and Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Youshuo Liu
- Department of Geriatrics, Institute of Aging and Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
168
|
Zhang X, Chu H, Wen L, Shuai H, Yang D, Wang Y, Hou Y, Zhu Z, Yuan S, Yin F, Chan JFW, Yuen KY. Competing endogenous RNA network profiling reveals novel host dependency factors required for MERS-CoV propagation. Emerg Microbes Infect 2020; 9:733-746. [PMID: 32223537 PMCID: PMC7170352 DOI: 10.1080/22221751.2020.1738277] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Circular RNAs (circRNAs) are an integral component of the host competitive endogenous RNA (ceRNA) network. These noncoding RNAs are characterized by their unique splicing reactions to form covalently closed loop structures and play important RNA regulatory roles in cells. Recent studies showed that circRNA expressions were perturbed in viral infections and circRNAs might serve as potential antiviral targets. We investigated the host ceRNA network changes and biological relevance of circRNAs in human lung adenocarcinoma epithelial (Calu-3) cells infected with the highly pathogenic Middle East respiratory syndrome coronavirus (MERS-CoV). A total of ≥49337 putative circRNAs were predicted. Among the 7845 genes which generated putative circRNAs, 147 (1.9%) of them each generated ≥30 putative circRNAs and were involved in various biological, cellular, and metabolic processes, including viral infections. Differential expression (DE) analysis showed that the proportion of DE circRNAs significantly (P < 0.001) increased at 24 h-post infection. These DE circRNAs were clustered into 4 groups according to their time-course expression patterns and demonstrated inter-cluster and intra-cluster variations in the predicted functions of their host genes. Our comprehensive circRNA-miRNA-mRNA network identified 7 key DE circRNAs involved in various biological processes upon MERS-CoV infection. Specific siRNA knockdown of two selected DE circRNAs (circFNDC3B and circCNOT1) significantly reduced MERS-CoV load and their target mRNA expression which modulates various biological pathways, including the mitogen-activated protein kinase (MAPK) and ubiquitination pathways. These results provided novel insights into the ceRNA network perturbations, biological relevance of circRNAs, and potential host-targeting antiviral strategies for MERS-CoV infection.
Collapse
Affiliation(s)
- Xi Zhang
- State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Hin Chu
- State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Lei Wen
- Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Huiping Shuai
- State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Dong Yang
- Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Yixin Wang
- Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Yuxin Hou
- Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Zheng Zhu
- Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Shuofeng Yuan
- State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| | - Feifei Yin
- Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, People's Republic of China, and The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Pathogen Biology, Hainan Medical University, Haikou, People's Republic of China.,Key Laboratory of Translational Tropical Medicine of Ministry of Education, Hainan Medical University, Haikou, People's Republic of China
| | - Jasper Fuk-Woo Chan
- State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, People's Republic of China, and The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Carol Yu Centre for Infection, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China.,Department of Clinical Microbiology and Infection Control, The University of Hong Kong-Shenzhen Hospital, Shenzhen, People's Republic of China
| | - Kwok-Yung Yuen
- Department of Clinical Microbiology and Infection Control, The University of Hong Kong-Shenzhen Hospital, Shenzhen, People's Republic of China.,The Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
| |
Collapse
|
169
|
Yu C, Cheng Z, Cui S, Mao X, Li B, Fu Y, Wang H, Jin H, Ye Q, Zhao X, Jiang L, Qin W. circFOXM1 promotes proliferation of non-small cell lung carcinoma cells by acting as a ceRNA to upregulate FAM83D. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:55. [PMID: 32228656 PMCID: PMC7106704 DOI: 10.1186/s13046-020-01555-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/08/2020] [Indexed: 01/26/2023]
Abstract
Background Biological role and clinical significance of circular RNAs (circRNAs) remain largely unknown. Herein, we aimed to investigate biological function, molecular mechanism, and clinical significance of a circular RNA FOXM1 (circFOXM1) in non-small cell lung cancer (NSCLC). Methods Expression of circFOXM1 was measured in 48 paired samples of NSCLC by qRT-PCR. Functional roles of circFOXM1 on tumor cells were explored by in vitro and in vivo assays. Transcriptome sequencing was employed to screen the molecules involved in circFOXM1 regulatory network. RNA immunoprecipitation, luciferase analysis, RNA pull-down, and rescue assay were used to investigate potential mechanisms of circFOXM1. Results We found that circFOXM1 was significantly upregulated in NSCLC tissues, and its upregulation was positively correlated with advanced clinical stage and poor prognosis of NSCLC patients. Gain or loss-of-function assay showed that circFOXM1 promoted cell proliferation and cell cycle progression. In vivo assays showed that silencing circFOXM1 inhibited xenograft tumor growth. Mechanically, transcriptome sequencing data indicated that silencing circFOXM1 led to the downregulation of cell cycle-related mRNAs. RNA pull-down and dual-luciferase reporter assay suggested that circFOXM1 could bind to miR-614, and FAM83D was an essential gene involved in the circFOXM1/miR-614 regulatory network. Conclusions circFOXM1promotes NSCLC progression by interacting with miR-614 and thus inactivating the function of miR-614, which will further release the suppression of FAM83D. circFOXM1/miR-614/FAM83D regulatory network may serve as a potential therapeutic target for NSCLC patients.
Collapse
Affiliation(s)
- Chengtao Yu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Biomedical Engineering, Shanghai, 200032, China
| | - Zhuoan Cheng
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Biomedical Engineering, Shanghai, 200032, China
| | - Shaohua Cui
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Xiaowei Mao
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Botai Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Biomedical Engineering, Shanghai, 200032, China
| | - Yujie Fu
- Department of Thoracic Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Hui Wang
- Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Haojie Jin
- Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Qing Ye
- Department of Thoracic Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Xiaojing Zhao
- Department of Thoracic Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Liyan Jiang
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China.
| | - Wenxin Qin
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Biomedical Engineering, Shanghai, 200032, China. .,Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China.
| |
Collapse
|
170
|
Yuan C, Luo X, Zhan X, Zeng H, Duan S. EMT related circular RNA expression profiles identify circSCYL2 as a novel molecule in breast tumor metastasis. Int J Mol Med 2020; 45:1697-1710. [PMID: 32236616 PMCID: PMC7169655 DOI: 10.3892/ijmm.2020.4550] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/14/2020] [Indexed: 12/11/2022] Open
Abstract
Substantial evidence indicates that circular RNAs (circRNAs) play vital roles in several diseases, especially in cancer development. However, the functions of circRNAs in breast cancer metastasis remain to be investigated. This study aimed to identify the key circRNAs involved in epithelial mesenchymal transition (EMT) of breast cancer and evaluated their molecular function and roles in pathways that may be associated with tumor metastasis. An EMT model was constructed by treating breast cancer cells MCF-7 and MDA-MB-231 with transforming growth factor-β1. High-throughput RNA sequencing was used to identify the differentially expressed circRNAs in EMT and blank groups of two cells, and reverse transcription-quantitative PCR was used to validate the expression of circSCYL2 in human breast cancer tissues and cells. The effects of circSCYL2 on breast cancer cells were explored by transfecting with plasmids and the biological roles were assessed using transwell assays. EMT groups of breast cancer cells exhibited the characteristics of mesenchymal cells. Furthermore, the present study found that 7 circRNAs were significantly upregulated in both the MCF-7 EMT and MDA-MB-231 EMT groups, while 16 circRNAs were significantly downregulated. The current study identified that circSCYL2 was downregulated in breast cancer tissues and cell lines, and that circSCYL2 overexpression inhibited cell migration and invasion. This study provides expression profiles of circRNAs in EMT groups of breast cancer cells. circSCYL2, which is downregulated in breast cancer tissues and cells, may play an important role in breast cancer EMT progression.
Collapse
Affiliation(s)
- Chunlei Yuan
- Department of Breast Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330000, P.R. China
| | - Xuliang Luo
- Medical College of Nanchang University, Nanchang, Jiangxi 330000, P.R. China
| | - Xiang Zhan
- Department of General Surgery, The People's Hospital of Le 'An County, Fuzhou, Jiangxi 344000, P.R. China
| | - Huihui Zeng
- Department of General Surgery, The People's Hospital of Le 'An County, Fuzhou, Jiangxi 344000, P.R. China
| | - Sijia Duan
- Department of Breast Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330000, P.R. China
| |
Collapse
|
171
|
Drula R, Braicu C, Harangus A, Nabavi SM, Trif M, Slaby O, Ionescu C, Irimie A, Berindan-Neagoe I. Critical function of circular RNAs in lung cancer. WILEY INTERDISCIPLINARY REVIEWS-RNA 2020; 11:e1592. [PMID: 32180372 DOI: 10.1002/wrna.1592] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/12/2022]
Abstract
Lung cancer is one of the main causes of cancer-related death in the world, especially due to its frequency and ineffective therapeutically approaches in the late stages of the disease. Despite the recent advent of promising new targeted therapies, lung cancer diagnostic strategies still have difficulty in identifying the disease at an early stage. Therefore, the characterizations of more sensible and specific cancer biomarkers have become an important goal for clinicians. Circular RNAs (circRNAs), a type of RNA with covalently closed continuous loop structures that display high structural resistance and tissue specificity pointed toward a potential biomarker role. Current investigations have identified that circRNAs have a prominent function in the regulation of oncogenic pathways, by regulating gene expression both at transcriptional and post-transcriptional level. The aim of this review is to provide novel information regarding the implications of circRNAs in lung cancer, with an emphasis on the role in disease development and progression. Initially, we explored the potential utility of circRNAs as biomarkers, focusing on function, mechanisms, and correlation with disease progression in lung cancer. Further, we will describe the interaction between circRNAs and other non-coding species of RNA (particularly microRNA) and their biological significance in lung cancer. Describing the nature of these interactions and their therapeutic potential will provide additional insight regarding the altered molecular landscape of lung cancer and consolidate the potential clinical value of these circular transcripts. This article is categorized under: RNA Structure and Dynamics > Influence of RNA Structure in Biological Systems RNA in Disease and Development > RNA in Disease RNA in Disease and Development > RNA in Development.
Collapse
Affiliation(s)
- Rares Drula
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Cornelia Braicu
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Antonia Harangus
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.,"Leon Daniello" Pneumology Clinic, Cluj-Napoca, Romania
| | - Seyed M Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | | | - Ondrej Slaby
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic.,Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Calin Ionescu
- 5th Surgical Department, Municipal Hospital, Cluj-Napoca, Romania.,Department of Surgery, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Alexandru Irimie
- Department of Surgery, The Oncology Institute "Prof. Dr. Ion Chiricuta", Cluj-Napoca, Romania.,Department of Surgical Oncology and Gynecological Oncology, University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Ioana Berindan-Neagoe
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.,MEDFUTURE-Research Center for Advanced Medicine, University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca, Romania.,Department of Functional Genomics and Experimental Pathology, The Oncology Institute Prof. Dr. Ion Chiricuta, Cluj-Napoca, Romania
| |
Collapse
|
172
|
Nedoluzhko A, Sharko F, Rbbani MG, Teslyuk A, Konstantinidis I, Fernandes JMO. CircParser: a novel streamlined pipeline for circular RNA structure and host gene prediction in non-model organisms. PeerJ 2020; 8:e8757. [PMID: 32211235 PMCID: PMC7081776 DOI: 10.7717/peerj.8757] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 02/16/2020] [Indexed: 01/07/2023] Open
Abstract
Circular RNAs (circRNAs) are long noncoding RNAs that play a significant role in various biological processes, including embryonic development and stress responses. These regulatory molecules can modulate microRNA activity and are involved in different molecular pathways as indirect regulators of gene expression. Thousands of circRNAs have been described in diverse taxa due to the recent advances in high throughput sequencing technologies, which led to a huge variety of total RNA sequencing being publicly available. A number of circRNA de novo and host gene prediction tools are available to date, but their ability to accurately predict circRNA host genes is limited in the case of low-quality genome assemblies or annotations. Here, we present CircParser, a simple and fast Unix/Linux pipeline that uses the outputs from the most common circular RNAs in silico prediction tools (CIRI, CIRI2, CircExplorer2, find_circ, and circFinder) to annotate circular RNAs, assigning presumptive host genes from local or public databases such as National Center for Biotechnology Information (NCBI). Also, this pipeline can discriminate circular RNAs based on their structural components (exonic, intronic, exon-intronic or intergenic) using a genome annotation file.
Collapse
Affiliation(s)
- Artem Nedoluzhko
- Faculty of Biosciences and Aquaculture, Nord University, Bodø, Bodø, Norway
| | - Fedor Sharko
- Complex of NBICS Technologies, National Research Centre "Kurchatov Institute", Moscow, Russia.,Institute of Bioengineering, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia, Russia
| | - Md Golam Rbbani
- Faculty of Biosciences and Aquaculture, Nord University, Bodø, Bodø, Norway
| | - Anton Teslyuk
- Complex of NBICS Technologies, National Research Centre "Kurchatov Institute", Moscow, Russia
| | | | | |
Collapse
|
173
|
Li X, Wu Y. Detecting circular RNA from high-throughput sequence data with de Bruijn graph. BMC Genomics 2020; 21:749. [PMID: 32138643 PMCID: PMC7057571 DOI: 10.1186/s12864-019-6154-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 09/30/2019] [Indexed: 12/02/2022] Open
Abstract
Background Circular RNA is a type of non-coding RNA, which has a circular structure. Many circular RNAs are stable and contain exons, but are not translated into proteins. Circular RNA has important functions in gene regulation and plays an important role in some human diseases. Several biological methods, such as RNase R treatment, have been developed to identify circular RNA. Multiple bioinformatics tools have also been developed for circular RNA detection with high-throughput sequence data. Results In this paper, we present circDBG, a new method for circular RNA detection with de Bruijn graph. We conduct various experiments to evaluate the performance of CircDBG based on both simulated and real data. Our results show that CircDBG finds more reliable circRNA with low bias, has more efficiency in running time, and performs better in balancing accuracy and sensitivity than existing methods. As a byproduct, we also introduce a new method to classify circular RNAs based on reads alignment. Finally, we report a potential chimeric circular RNA that is found by CircDBG based on real sequence data. CircDBG can be downloaded from https://github.com/lxwgcool/CircDBG. Conclusions We develop a new method called CircDBG for circular RNA detection, which is based on de Bruijn graph. We conduct extensive experiments and demonstrate CircDBG outperforms existing tools, especially in saving running time, reducing bias and improving capability of balancing accuracy and sensitivity. We also introduce a new method to classify circular RNAs and report a potential case of chimeric circular RNA.
Collapse
Affiliation(s)
- Xin Li
- Department of Computer Science and Engineering, University of Connecticut, Storrs, 06269, CT, USA.
| | - Yufeng Wu
- Department of Computer Science and Engineering, University of Connecticut, Storrs, 06269, CT, USA
| |
Collapse
|
174
|
Abstract
AbstractFollowing improvement and integration of novel genome sequencing techniques, a new stage light has been shone upon circular RNAs (circRNA) in regard to their structure and functionality. In comparison to their linear counterparts, circRNA possess a multitude of remarkable functions such as microRNA (miRNA) sponging, RNA-binding protein (RBP) regulation and translational capabilities whose research have recently gained traction. Comprehensive computational modelling and analysis have revealed the relationship between the sequence composition of circRNAs and their biogenesis and structural formation as well as spatial identification. Due to fluctuations in expressional activity in tissue-specific environments and stimulations by tumour cells, circRNAs have sparked considerable interest in being employed as plausible biomarkers in disease control and treatment as consequence of their impressive specificity and biocompatibility. Additionally, an increasing number of studies have proposed them as viable solutions to be just as competent as presently used disease markers and medicine, if not better. In this review, I briefly summarized the characteristics, biogenesis and function of circRNA and introduced the potential applications and prospects of circRNA. With vigorous research being carried out regarding their still unclear diversified roles and precise molecular structure, circRNAs are bound to become the new revolutionary perspective on cellular regulation, protein signalling and disease pathogenesis.
Collapse
|
175
|
Zhu Y, Jiang X, Zhang S, Wang L, Zhou Q, Jiang J. Hsa_circ_103973 Acts as a Sponge of miR-335 to Promote Cervical Cancer Progression. Onco Targets Ther 2020; 13:1777-1786. [PMID: 32184614 PMCID: PMC7053992 DOI: 10.2147/ott.s215736] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 08/20/2019] [Indexed: 12/13/2022] Open
Abstract
Background Cervical cancer (CC) ranks as the second most common malignancy in women, accounting for more two 2 million deaths every year in the world. Recently, circular RNAs (circRNAs) have been reported to regulate the progression of multiple human tumors; however, whether it involves in CC remains largely elusive. Materials and Methods Two GEO circRNA expression profiles (GSE102686, GSE113696) were downloaded to analyze the differentially expressed circRNAs using bioinformatics methods. Expression of circ_103973, miR-335 and PPP6C in CC tissues and cell lines were examined by qRT-PCR. Cell apoptosis was assessed with PI/Annexin-V double staining followed by the analysis of flow cytometry. Cell proliferation was evaluated by MTT and colony formation assays. Interaction between circ_103973 and miR-335, as well as miR-335 and PPP6C, were verified by dual-luciferase reporter assay. Results Circ_103973 was found to be highly expressed in both GSE102686 and GSE113696 datasets as well as in CC tissue samples and cell lines. Higher levels of circ_103973 were correlated to a worse outcome of CC patients. Knockdown of circ_103973 significantly promoted CC cell apoptosis and inhibited CC cell proliferation in vitro. Mechanistically, we demonstrated that circ_103973 served as a sponge of miR-335, which directly targeted PPP6C in CC cells. miR-335 was found to be decreased in CC, while PPP6C was found to be increased in CC. Moreover, anti-miR-335 could reverse the inhibitory effects of circ_103973 knockdown on CC cell proliferation, and this phenomenon could be blocked by si-PPP6C. Conclusion Circ_103973 promoted CC cell proliferation in vitro by physically binding miR-335, which further targeted and regulated PPP6C.
Collapse
Affiliation(s)
- Yingping Zhu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Zhejiang University of Traditional Chinese Medicine, Hangzhou 310006, People's Republic of China
| | - Xuelu Jiang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Zhejiang University of Traditional Chinese Medicine, Hangzhou 310006, People's Republic of China
| | - Shuo Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Zhejiang University of Traditional Chinese Medicine, Hangzhou 310006, People's Republic of China
| | - Lingcong Wang
- Department of Critical Care Medicine, The First Affiliated Hospital of Zhejiang University of Traditional Chinese Medicine, Hangzhou 310006, People's Republic of China
| | - Qun Zhou
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Zhejiang University of Traditional Chinese Medicine, Hangzhou 310006, People's Republic of China
| | - Jun Jiang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Zhejiang University of Traditional Chinese Medicine, Hangzhou 310006, People's Republic of China
| |
Collapse
|
176
|
Das Mahapatra K, Pasquali L, Søndergaard JN, Lapins J, Nemeth IB, Baltás E, Kemény L, Homey B, Moldovan LI, Kjems J, Kutter C, Sonkoly E, Kristensen LS, Pivarcsi A. A comprehensive analysis of coding and non-coding transcriptomic changes in cutaneous squamous cell carcinoma. Sci Rep 2020; 10:3637. [PMID: 32108138 PMCID: PMC7046790 DOI: 10.1038/s41598-020-59660-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 01/31/2020] [Indexed: 12/11/2022] Open
Abstract
Cutaneous Squamous Cell Carcinoma (cSCC) is the most common and fastest-increasing cancer with metastatic potential. Long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) are novel regulators of gene expression. To identify mRNAs, lncRNAs and circRNAs, which can be involved in cSCC, RNA-seq was performed on nine cSCCs and seven healthy skin samples. Representative transcripts were validated by NanoString nCounter assays using an extended cohort, which also included samples from pre-cancerous skin lesions (actinic keratosis). 5,352 protein-coding genes, 908 lncRNAs and 55 circular RNAs were identified to be differentially expressed in cSCC. Targets of 519 transcription factors were enriched among differentially expressed genes, 105 of which displayed altered level in cSCCs, including fundamental regulators of skin development (MYC, RELA, ETS1, TP63). Pathways related to cell cycle, apoptosis, inflammation and epidermal differentiation were enriched. In addition to known oncogenic lncRNAs (PVT1, LUCAT1, CASC9), a set of skin-specific lncRNAs were were identified to be dysregulated. A global downregulation of circRNAs was observed in cSCC, and novel skin-enriched circRNAs, circ_IFFO2 and circ_POF1B, were identified and validated. In conclusion, a reference set of coding and non-coding transcripts were identified in cSCC, which may become potential therapeutic targets or biomarkers.
Collapse
Affiliation(s)
- Kunal Das Mahapatra
- Dermatology and Venereology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.,Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Lorenzo Pasquali
- Dermatology and Venereology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.,Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Nørskov Søndergaard
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Science for Life Laboratory, SE-171 77, Stockholm, Sweden
| | - Jan Lapins
- Unit of Dermatology, Karolinska University Hospital, SE-17176, Stockholm, Sweden
| | - István Balazs Nemeth
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Eszter Baltás
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Lajos Kemény
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Bernhard Homey
- Department of Dermatology, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Liviu-Ionut Moldovan
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000, Aarhus, Denmark.,Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Jørgen Kjems
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000, Aarhus, Denmark.,Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Claudia Kutter
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Science for Life Laboratory, SE-171 77, Stockholm, Sweden
| | - Enikö Sonkoly
- Dermatology and Venereology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.,Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden.,Unit of Dermatology, Karolinska University Hospital, SE-17176, Stockholm, Sweden
| | - Lasse Sommer Kristensen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000, Aarhus, Denmark.,Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Andor Pivarcsi
- Dermatology and Venereology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden. .,Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden. .,Research Institute of Translational Biomedicine, University of Szeged, Szeged, Hungary.
| |
Collapse
|
177
|
Schmidt CA, Giusto JD, Bao A, Hopper AK, Matera AG. Molecular determinants of metazoan tricRNA biogenesis. Nucleic Acids Res 2020; 47:6452-6465. [PMID: 31032518 PMCID: PMC6614914 DOI: 10.1093/nar/gkz311] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/12/2019] [Accepted: 04/18/2019] [Indexed: 12/22/2022] Open
Abstract
Mature tRNAs are generated by multiple post-transcriptional processing steps, which can include intron removal. Recently, we discovered a new class of circular non-coding RNAs in metazoans, called tRNA intronic circular (tric)RNAs. To investigate the mechanism of tricRNA biogenesis, we generated constructs that replace native introns of human and fruit fly tRNA genes with the Broccoli fluorescent RNA aptamer. Using these reporters, we identified cis-acting elements required for tricRNA formation in vivo. Disrupting a conserved base pair in the anticodon-intron helix dramatically reduces tricRNA levels. Although the integrity of this base pair is necessary for proper splicing, it is not sufficient. In contrast, strengthening weak bases in the helix also interferes with splicing and tricRNA production. Furthermore, we identified trans-acting factors important for tricRNA biogenesis, including several known tRNA processing enzymes such as the RtcB ligase and components of the TSEN endonuclease complex. Depletion of these factors inhibits Drosophila tRNA intron circularization. Notably, RtcB is missing from fungal genomes and these organisms normally produce linear tRNA introns. Here, we show that in the presence of ectopic RtcB, yeast lacking the tRNA ligase Rlg1/Trl1 are converted into producing tricRNAs. In summary, our work characterizes the major players in eukaryotic tricRNA biogenesis.
Collapse
Affiliation(s)
- Casey A Schmidt
- Curriculum in Genetics & Molecular Biology and Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Joseph D Giusto
- Department of Biology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Alicia Bao
- Center for RNA Biology and Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| | - Anita K Hopper
- Center for RNA Biology and Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| | - A Gregory Matera
- Curriculum in Genetics & Molecular Biology and Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC 27599, USA.,Department of Biology, University of North Carolina, Chapel Hill, NC 27599, USA.,Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA
| |
Collapse
|
178
|
He JH, Han ZP, Luo JG, Jiang JW, Zhou JB, Chen WM, Lv YB, He ML, Zheng L, Li YG, Zuo JD. Hsa_Circ_0007843 Acts as a mIR-518c-5p Sponge to Regulate the Migration and Invasion of Colon Cancer SW480 Cells. Front Genet 2020; 11:9. [PMID: 32158464 PMCID: PMC7052121 DOI: 10.3389/fgene.2020.00009] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 01/06/2020] [Indexed: 12/20/2022] Open
Abstract
Circular RNA (circRNA), a type of RNA that is widely expressed in mammalian cells, is considered to be essential in tumorigenesis. CircRNA can regulate target gene expression by interacting with the corresponding microRNA (miRNA). Our preliminary results showed that the expression levels of 1,817 circRNAs were significantly different in colon cancer tissue compared with paracancerous tissue, of which 1,236 were upregulated and 581 were downregulated. By using RT-PCR, we confirmed that the expression of hsa_circ_0007843, hsa_circ_0010575, hsa_circ_0007331, and hsa_circ_0001615 was significantly higher in colon cancer tissue than in normal colonic tissue; however, the expression levels of hsa_circ_0014879 and hsa_circRNA_401801 were not significantly different between normal and neoplastic colonic tissue. Among the circRNAs that were confirmed to be upregulated in colon cancer tissue, hsa_circ_0007843 was also found to be highly expressed in colon cancer SW480 cells. Overexpression of hsa_circ_0007843 promoted the invasion and migration of SW480 cells, whereas its downregulation suppressed their invasion and migration. Overexpression of hsa_circ_0007843 promoted tumor growth, whereas its downregulation inhibited tumor growth. We found that hsa_circ_0007843 interacted with miR-518c-5p and suppressed its expression, and miR-518c-5p interacted with matrix metallopeptidase 2 (MMP2) and promoted its expression and translation. Taken together, this study demonstrated that hsa_circ_0007843 acted as an miRNA sponge to regulate MMP2 expression by removing the inhibitory effect of miR-518c-5p on MMP2 gene translation, which further affected the invasive capability of SW480 cells.
Collapse
Affiliation(s)
- Jin Hua He
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Ze Ping Han
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Jin Gen Luo
- Digesting Center, Central Hospital of Panyu District, Guangzhou, China
| | - Jian Wei Jiang
- Department of Biochemistry, Medical College, Jinan University, Guangzhou, China
| | - Jia Bin Zhou
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Wei Ming Chen
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Yu Bing Lv
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Meng Ling He
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Lei Zheng
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yu Guang Li
- Department of Laboratory Medicine, Central Hospital of Panyu District, Guangzhou, China
| | - Ji Dong Zuo
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
179
|
Lei X, Bian C. Integrating random walk with restart and k-Nearest Neighbor to identify novel circRNA-disease association. Sci Rep 2020; 10:1943. [PMID: 32029856 PMCID: PMC7005057 DOI: 10.1038/s41598-020-59040-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 01/23/2020] [Indexed: 01/21/2023] Open
Abstract
CircRNA is a special type of non-coding RNA, which is closely related to the occurrence and development of many complex human diseases. However, it is time-consuming and expensive to determine the circRNA-disease associations through experimental methods. Therefore, based on the existing databases, we propose a method named RWRKNN, which integrates the random walk with restart (RWR) and k-nearest neighbors (KNN) to predict the associations between circRNAs and diseases. Specifically, we apply RWR algorithm on weighting features with global network topology information, and employ KNN to classify based on features. Finally, the prediction scores of each circRNA-disease pair are obtained. As demonstrated by leave-one-out, 5-fold cross-validation and 10-fold cross-validation, RWRKNN achieves AUC values of 0.9297, 0.9333 and 0.9261, respectively. And case studies show that the circRNA-disease associations predicted by RWRKNN can be successfully demonstrated. In conclusion, RWRKNN is a useful method for predicting circRNA-disease associations.
Collapse
Affiliation(s)
- Xiujuan Lei
- School of Computer Science, Shaanxi Normal University, Xi'an, 710119, China.
| | - Chen Bian
- School of Computer Science, Shaanxi Normal University, Xi'an, 710119, China
| |
Collapse
|
180
|
Wang Z, Huang C, Zhang A, Lu C, Liu L. Overexpression of circRNA_100290 promotes the progression of laryngeal squamous cell carcinoma through the miR-136-5p/RAP2C axis. Biomed Pharmacother 2020; 125:109874. [PMID: 32014687 DOI: 10.1016/j.biopha.2020.109874] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/06/2020] [Accepted: 01/10/2020] [Indexed: 02/08/2023] Open
Abstract
Circular RNAs (circRNAs) exert critical functions in tumorigenesis and tumor development, but whether and how circRNAs contribute to laryngeal squamous cell carcinoma (LSCC) is unclear. In this study, we explored the function and mechanisms of circRNA_100290 in LSCC. Tissue samples were obtained from 40 patients with LSCC. The expression of circRNA_100290 and other targets was measured through quantitative reverse transcription-polymerase chain reaction and western blot analysis. Cell proliferation, colony-forming ability, and apoptosis were tested using CCK-8 assay and EdU assay, colony formation assay, and flow cytometry, respectively. Cell migration and invasion were detected by Transwell assay. Moreover, the interactions between circRNA_100290, miR-136-5p, and RAP2C were analyzed by bioinformatics, and verified by dual-luciferase reporter assays. Here, we found that circRNA_100290 expression was significantly upregulated in LSCC tissues and cell lines compared with the normal controls. Expression of circRNA_100290 positively correlated with advanced TNM stage and lymph node metastasis in LSCC patients. In cell culture, upregulation of circRNA_100290 promoted LSCC cell proliferation, migration, and invasion, while it inhibited cell apoptosis; downregulating circRNA_100290 exerted the opposite effects. In vivo, circRNA_100290 overexpression dramatically promoted tumor growth. Mechanistically, circRNA_100290 may act as a sponge of miR-136-5p, and inhibiting miR-136-5p in LSCC cells indeed reversed the effects of circRNA_100290 downregulation. The RAS oncogene RAP2C was predicted to be a target of miR-136-5p, and downregulating RAP2C in LSCC cells partially reversed the oncogenic effects of circRNA_100290 overexpression or miR-136-5p decrease. Our findings suggest that circRNA_100290 promotes LSCC progression by targeting the miR-136-5p/RAP2C axis, which may lead to the identification of potential therapeutic targets.
Collapse
Affiliation(s)
- Zhenxiao Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, 100050, Beijing, China.
| | - Chaoping Huang
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, 100050, Beijing, China.
| | - Aobo Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, 100050, Beijing, China.
| | - Cheng Lu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, 100050, Beijing, China.
| | - Liangfa Liu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, 100050, Beijing, China.
| |
Collapse
|
181
|
The Non-Coding RNA Landscape of Plasma Cell Dyscrasias. Cancers (Basel) 2020; 12:cancers12020320. [PMID: 32019064 PMCID: PMC7072200 DOI: 10.3390/cancers12020320] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 12/14/2022] Open
Abstract
Despite substantial advancements have been done in the understanding of the pathogenesis of plasma cell (PC) disorders, these malignancies remain hard-to-treat. The discovery and subsequent characterization of non-coding transcripts, which include several members with diverse length and mode of action, has unraveled novel mechanisms of gene expression regulation often malfunctioning in cancer. Increasing evidence indicates that such non-coding molecules also feature in the pathobiology of PC dyscrasias, where they are endowed with strong therapeutic and/or prognostic potential. In this review, we aim to summarize the most relevant findings on the biological and clinical features of the non-coding RNA landscape of malignant PCs, with major focus on multiple myeloma. The most relevant classes of non-coding RNAs will be examined, along with the mechanisms accounting for their dysregulation and the recent strategies used for their targeting in PC dyscrasias. It is hoped these insights may lead to clinical applications of non-coding RNA molecules as biomarkers or therapeutic targets/agents in the near future.
Collapse
|
182
|
Papaioannou D, Volinia S, Nicolet D, Świerniak M, Petri A, Mrózek K, Bill M, Pepe F, Walker CJ, Walker AE, Carroll AJ, Kohlschmidt J, Eisfeld AK, Powell BL, Uy GL, Kolitz JE, Wang ES, Kauppinen S, Dorrance A, Stone RM, Byrd JC, Bloomfield CD, Garzon R. Clinical and functional significance of circular RNAs in cytogenetically normal AML. Blood Adv 2020; 4:239-251. [PMID: 31945158 PMCID: PMC6988408 DOI: 10.1182/bloodadvances.2019000568] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 11/14/2019] [Indexed: 01/08/2023] Open
Abstract
Circular RNAs (circRNAs) are noncoding RNA molecules that display a perturbed arrangement of exons, called backsplicing. To examine the prognostic and biologic significance of circRNA expression in cytogenetically normal acute myeloid leukemia (CN-AML), we conducted whole-transcriptome profiling in 365 younger adults (age 18-60 years) with CN-AML. We applied a novel pipeline, called Massive Scan for circRNA, to identify and quantify circRNA expression. We validated the high sensitivity and specificity of our pipeline by performing RNase R treatment and RNA sequencing in samples of AML patients and cell lines. Unsupervised clustering analyses identified 3 distinct circRNA expression-based clusters with different frequencies of clinical and molecular features. After dividing our cohort into training and validation data sets, we identified 4 circRNAs (circCFLAR, circKLHL8, circSMC1A, and circFCHO2) that were prognostic in both data sets; high expression of each prognostic circRNA was associated with longer disease-free, overall, and event-free survival. In multivariable analyses, high circKLHL8 and high circFCHO2 expression were independently associated with better clinical outcome of CN-AML patients, after adjusting for other covariates. To examine the biologic relevance of circRNA expression, we performed knockdown screening experiments in a subset of prognostic and gene mutation-related candidate circRNAs. We identified circFBXW7, but not its linear messenger RNA, as a regulator of the proliferative capacity of AML blasts. In summary, our findings underscore the molecular associations, prognostic significance, and functional relevance of circRNA expression in CN-AML.
Collapse
Affiliation(s)
| | - Stefano Volinia
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Deedra Nicolet
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
- Alliance Statistics and Data Center, The Ohio State University, Columbus, OH
| | - Michał Świerniak
- Centre of New Technologies, University of Warsaw, Warsaw, Poland
| | - Andreas Petri
- Center for RNA Medicine, Department of Clinical Medicine, Aalborg University, Copenhagen, Denmark
| | - Krzysztof Mrózek
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
| | - Marius Bill
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
| | - Felice Pepe
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
| | | | - Allison E Walker
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
| | - Andrew J Carroll
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL
| | - Jessica Kohlschmidt
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
- Alliance Statistics and Data Center, The Ohio State University, Columbus, OH
| | | | - Bayard L Powell
- The Comprehensive Cancer Center of Wake Forest University, Winston-Salem, NC
| | - Geoffrey L Uy
- Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO
| | - Jonathan E Kolitz
- Monter Cancer Center, Hofstra Northwell School of Medicine, Lake Success, NY
| | - Eunice S Wang
- Department of Medicine, Roswell Park Cancer Institute, Buffalo, NY; and
| | - Sakari Kauppinen
- Center for RNA Medicine, Department of Clinical Medicine, Aalborg University, Copenhagen, Denmark
| | | | - Richard M Stone
- Dana-Farber Cancer Institute, Harvard University, Boston, MA
| | - John C Byrd
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
| | | | - Ramiro Garzon
- The Ohio State University Comprehensive Cancer Center, Columbus, OH
| |
Collapse
|
183
|
Molecular Mechanisms Driving mRNA Degradation by m 6A Modification. Trends Genet 2020; 36:177-188. [PMID: 31964509 DOI: 10.1016/j.tig.2019.12.007] [Citation(s) in RCA: 206] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 12/05/2019] [Accepted: 12/10/2019] [Indexed: 02/08/2023]
Abstract
N6-Methyladenosine (m6A), the most prevalent internal modification associated with eukaryotic mRNAs, influences many steps of mRNA metabolism, including splicing, export, and translation, as well as stability. Recent studies have revealed that m6A-containing mRNAs undergo one of two distinct pathways of rapid degradation: deadenylation via the YT521-B homology (YTH) domain-containing family protein 2 (YTHDF2; an m6A reader protein)-CCR4/NOT (deadenylase) complex or endoribonucleolytic cleavage by the YTHDF2-HRSP12-ribonuclease (RNase) P/mitochondrial RNA-processing (MRP) (endoribonuclease) complex. Some m6A-containing circular RNAs (circRNAs) are also subject to endoribonucleolytic cleavage by YTHDF2-HRSP12-RNase P/MRP. Here, we highlight recent progress on the molecular mechanisms underlying rapid mRNA degradation via m6A and describe our current understanding of the dynamic regulation of m6A-mediated mRNA decay through the crosstalk between m6A (or YTHDF2) and other cellular factors.
Collapse
|
184
|
Wu P, Zhang D, Geng Y, Li R, Zhang Y. Circular RNA-ZNF609 regulates corneal neovascularization by acting as a sponge of miR-184. Exp Eye Res 2020; 192:107937. [PMID: 31954666 DOI: 10.1016/j.exer.2020.107937] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/19/2019] [Accepted: 01/14/2020] [Indexed: 01/14/2023]
Abstract
Corneal neovascularization can cause abnormal blood vessels to grow in the normally transparent and translucent cornea leading to various sight-threatening eye diseases. microRNAs and circular RNAs are known to play essential roles in the regulation of numerous biological functions. It is urgently needed to understand the molecular mechanism of miRNAs and circular RNAs in the corneal neovascularization. We aimed to elucidate the role of a specific a circular RNA, cZNF609, in the corneal neovascularization. cZNF609 and miR-184 levels were determined by RT-qPCR. Luciferase reporter assay and RNA immunoprecipitation assay were conducted to verify the target of cZNF609. The biological function of cZNF609 and miR-184 were assessed via cell proliferation, migration, and tube formation assays in vitro as well as the corneal suture model in vivo. The up-regulation of cZNF609 and down-regulation of miR-184 were observed during corneal neovascularization. cZNF609 acted as a miR-184 sponge to block miR-184 activity. Overexpression of miR-184 suppressed HCEKs cell proliferation, migration in vitro, and angiogenesis in vivo. The miR-184-mediated inhibition effect can be rescued through the re-introduction of cZNF609. Mechanically, cZNF609/miR-184 interaction regulated the downstream Akt and VEGF signaling pathway. Intervention of cZNF609 and miR-184 may serve as a potential strategy for pathological corneal neovascularization treatment.
Collapse
Affiliation(s)
- Pengcheng Wu
- Department of Ophthalmology, Lanzhou University Second Hospital, No.82 Cuiyingmen, Lanzhou, 730030, Gansu, China.
| | - Dongyan Zhang
- Department of Ophthalmology, Lanzhou University Second Hospital, No.82 Cuiyingmen, Lanzhou, 730030, Gansu, China
| | - Yuanyuan Geng
- Department of Ophthalmology, Lanzhou University Second Hospital, No.82 Cuiyingmen, Lanzhou, 730030, Gansu, China
| | - Rui Li
- Department of Ophthalmology, Lanzhou University Second Hospital, No.82 Cuiyingmen, Lanzhou, 730030, Gansu, China
| | - Yanan Zhang
- Department of Ophthalmology, Lanzhou University Second Hospital, No.82 Cuiyingmen, Lanzhou, 730030, Gansu, China
| |
Collapse
|
185
|
Wu G, Zhou W, Lin X, Sun Y, Li J, Xu H, Shi P, Gao L, Tian X. circRASSF2 Acts as ceRNA and Promotes Papillary Thyroid Carcinoma Progression through miR-1178/TLR4 Signaling Pathway. MOLECULAR THERAPY-NUCLEIC ACIDS 2020; 19:1153-1163. [PMID: 32059341 PMCID: PMC7016041 DOI: 10.1016/j.omtn.2019.11.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/08/2019] [Accepted: 11/12/2019] [Indexed: 12/22/2022]
Abstract
Circular RNAs (circRNAs) are a class of non-coding RNAs broadly expressed in cells of various species. However, the molecular mechanisms that link circRNAs with progression of papillary thyroid carcinoma (PTC) are not well understood. In the present study, we attempted to provide novel basis for targeted therapy for PTC from the aspect of circRNA-miRNA-mRNA interaction. We investigated the expression of circRNAs in five paired PTC tissues and normal tissues by microarray analysis. The circRNA microarray assay followed by qRT-PCR was used to verify the differential expression of hsa_circ_0059354, which is located on chromosome 20 and derived from RASSF2, and thus we named it circRASSF2. The qRT-PCR analysis was to investigate the expression pattern of circRASSF2 in PTC tissues and cell lines. Then the effects of circRASSF2 on cell proliferation and apoptosis were assessed in PTC in vitro. Furthermore, bioinformatics online programs predicted and luciferase reporter assays were used to validate the association of circRASSF2 and miR-1178 in PTC cells. In this study, circRASSF2 was observed to be upregulated in PTC tissues and cell lines. Knockdown of circRASSF2 inhibited cell proliferation and promoted cell apoptosis in PTC cells. Bioinformatics analysis predicted that there is a circRASSF2/miR-1178/TLR4 axis in PTC. A dual-luciferase reporter system validated the direct interaction of circRASSF2, miR-1178, and TLR4. Furthermore, circRASSF2 facilitates PTC progression in vivo. Importantly, we demonstrated that circRASSF2 was upregulated in serum exosomes from PTC patients. In summary, our study demonstrates that circRASSF2 modulates PTC progression through the miR-1178/TLR4 pathway. Our findings indicate that circRASSF2 may serve as a promising therapeutic target for the treatment of PTC patients.
Collapse
Affiliation(s)
- Guojun Wu
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China; Department of Breast and Thyroid Surgery, Shandong Provincial ENT Hospital affiliated to Shandong University, Jinan 250022, China
| | - Wenhong Zhou
- Department of Nursing, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
| | - Xiaona Lin
- Department of Breast and Thyroid Surgery, Zibo Central Hospital, Zibo 250036, China
| | - Yongjie Sun
- Department of Breast and Thyroid Surgery, Shandong Provincial ENT Hospital affiliated to Shandong University, Jinan 250022, China
| | - Jiyu Li
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
| | - Hao Xu
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
| | - Peng Shi
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
| | - Ling Gao
- Scientific Center, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
| | - Xingsong Tian
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
| |
Collapse
|
186
|
Abere B, Li J, Zhou H, Toptan T, Moore PS, Chang Y. Kaposi's Sarcoma-Associated Herpesvirus-Encoded circRNAs Are Expressed in Infected Tumor Tissues and Are Incorporated into Virions. mBio 2020; 11:e03027-19. [PMID: 31911496 PMCID: PMC6946807 DOI: 10.1128/mbio.03027-19] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 11/21/2019] [Indexed: 12/19/2022] Open
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) has recently been found to generate circular RNAs (circRNAs) from several KSHV genes, most abundantly from K10 (viral interferon regulatory factor 4 [vIRF4]), K7.3, and polyadenylated nuclear (PAN) RNA. To define expression of these circRNAs, KSHV-infected cell lines, patient tissues, and purified virions were examined. KSHV circRNA expression was universally detected in tests of six primary effusion lymphoma (PEL) cell lines but ranged from low-level expression in BC-1 cells dually infected with tightly latent KSHV and Epstein-Barr virus to abundant expression in KSHV-only BCBL-1 cells with spontaneous virus production. Generally, the PAN/K7.3 locus broadly and bidirectionally generated circRNA levels that paralleled the corresponding linear RNA levels. However, RNA corresponding to a particular KSHV circularization site (circ-vIRF4) was minimally induced, despite linear vIRF4 RNA being activated by virus induction. In situ hybridization showed abundant circ-vIRF4 in noninduced PEL cells. All three KSHV circRNAs were isolated as nuclease-protected forms from gradient-purified virions collected from BrK.219 cells infected with a KSHV molecular clone. For circ-vIRF4, the fully processed form that is exported to the cytoplasm was incorporated into virus particles but the nuclear, intron-retaining form was not. The half-life of circ-vIRF4 was twice as long as that of its linear counterpart. The KSHV circRNAs could be detected at a higher rate than their corresponding linear counterparts by in situ hybridization in archival tissues and by reverse transcription-PCR (RT-PCR) in sera stored for over 25 years. In summary, KSHV circRNAs are expressed in infection-associated diseases, can be regulated depending on virus life cycle, and are incorporated into viral particles for preformed delivery, suggesting a potential function in early infection.IMPORTANCE KSHV has recently been found to encode circRNAs. circRNAs result from back-splicing of an upstream pre-mRNA splice donor exon-intron junction to an acceptor site, generating a covalently closed circle. This study revealed that for one KSHV region, the PAN/K7.3 locus, broadly and bidirectionally generated circRNA levels parallel corresponding linear RNA levels. Another KSHV circularization site (circ-vIRF4), however, showed expression that differed from that of the corresponding linear RNA. All KSHV circRNAs are incorporated into KSHV virions and are potentially expressed as immediate early products in newly infected cells.
Collapse
Affiliation(s)
- Bizunesh Abere
- Hillman Cancer Center, Cancer Virology Program, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jinghui Li
- Hillman Cancer Center, Cancer Virology Program, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- School of Medicine, Tsinghua University, Beijing, People's Republic of China
| | - Hongzhao Zhou
- Hillman Cancer Center, Cancer Virology Program, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Tuna Toptan
- Hillman Cancer Center, Cancer Virology Program, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Patrick S Moore
- Hillman Cancer Center, Cancer Virology Program, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Yuan Chang
- Hillman Cancer Center, Cancer Virology Program, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| |
Collapse
|
187
|
Zhang S, Song G, Yuan J, Qiao S, Xu S, Si Z, Yang Y, Xu X, Wang A. Circular RNA circ_0003204 inhibits proliferation, migration and tube formation of endothelial cell in atherosclerosis via miR-370-3p/TGFβR2/phosph-SMAD3 axis. J Biomed Sci 2020; 27:11. [PMID: 31900142 PMCID: PMC6941276 DOI: 10.1186/s12929-019-0595-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 11/18/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Circular RNAs (circRNAs) represent a class of non-coding RNAs (ncRNAs) which are widely expressed in mammals and tissue-specific, of which some could act as critical regulators in the atherogenesis of cerebrovascular disease. However, the underlying mechanisms by which circRNA regulates the ectopic phenotype of endothelial cells (ECs) in atherosclerosis remain largely elusive. METHODS CCK-8, transwell, wound healing and Matrigel assays were used to assess cell viability, migration and tube formation. QRT-qPCR and Immunoblotting were used to examine targeted gene expression in different groups. The binding sites of miR-370-3p (miR-370) with TGFβR2 or hsa_circ_0003204 (circ_0003204) were predicted using a series of bioinformatic tools, and validated using dual luciferase assay and RNA immunoprecipitation (RIP) assay. The localization of circ_0003204 and miR-370 in ECs were investigated by fluorescence in situ hybridization (FISH). Gene function and pathways were enriched through Metascape and gene set enrichment analysis (GSEA). The association of circ_0003204 and miR-370 in extracellular vesicles (EVs) with clinical characteristics of patients were investigated using multiple statistical analysis. RESULTS Circ_0003204, mainly located in the cytoplasm of human aorta endothelial cells (HAECs), was upregulated in the ox-LDL-induced HAECs. Functionally, the ectopic expression of circ_0003204 inhibited proliferation, migration and tube formation of HAECs exposed to ox-LDL. Mechanically, circ_0003204 could promote protein expression of TGFβR2 and its downstream phosph-SMAD3 through sponging miR-370, and miR-370 targeted the 3' untranslated region (UTR) of TGFβR2. Furthermore, the expression of circ_0003204 in plasma EVs was upregulated in the patients with cerebral atherosclerosis, and represented a potential biomarker for diangnosis and prognosis of cerebrovascular atherogenesis. CONCLUSIONS Circ_0003204 could act as a novel stimulator for ectopic endothelial inactivation in atherosclerosis and a potential biomarker for cerebral atherosclerosis.
Collapse
Affiliation(s)
- Shanchao Zhang
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China.
| | - Guixiang Song
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Jing Yuan
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Shan Qiao
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Shan Xu
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Zhihua Si
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Yang Yang
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Xuxu Xu
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| | - Aihua Wang
- Department of Neurology, the First Affiliated Hospital of Shandong, First Medical University, NO.16766 JingShi Road, Jinan, 250014, Shandong, China
| |
Collapse
|
188
|
Naeli P, Pourhanifeh MH, Karimzadeh MR, Shabaninejad Z, Movahedpour A, Tarrahimofrad H, Mirzaei HR, Bafrani HH, Savardashtaki A, Mirzaei H, Hamblin MR. Circular RNAs and gastrointestinal cancers: Epigenetic regulators with a prognostic and therapeutic role. Crit Rev Oncol Hematol 2020; 145:102854. [PMID: 31877535 PMCID: PMC6982584 DOI: 10.1016/j.critrevonc.2019.102854] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 02/06/2023] Open
Abstract
Both environmental and genetic factors are involved in the initiation and development of gastrointestinal cancer. Covalent closed circular RNAs (circRNAs) are produced by a mechanism called "back-splicing" from mRNAs. They are highly stable and show cell and tissue specific expression patterns. Although some functions such as "microRNA sponge" and "RNA binding protein sponge" have been reported for a small number of circRNAs, the function of thousands of other circRNAs is still unknown. Dysregulation of circRNAs has been reported in many GI cancers and are involved in metastasis and invasion. CircRNAs have been reported to be useful as prognostic markers and targets for developing new treatments. We first describe the properties and biogenesis of circRNAs. We then summarize recent reports about circRNA functions, expression status, and their potential to be used as biomarkers in GI cancers including, gastric cancer, colorectal cancer, esophageal cancer, hepatocellular carcinoma, gallbladder cancer and pancreatic cancer.
Collapse
Affiliation(s)
- Parisa Naeli
- Department of Biological Sciences, Faculty of Genetics, Tarbiat Modares University, Tehran, Iran.
| | | | - Mohammad Reza Karimzadeh
- Department of Medical Genetics, School of Medicine, Bam University of Medical Sciences, Bam, Iran.
| | - Zahra Shabaninejad
- Department of Nanobiotechnology, School of Basic Sciences, TarbiatModares University, Tehran, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Ahmad Movahedpour
- Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences Shiraz, Iran; Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Hossein Tarrahimofrad
- Department of Animal Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
| | - Hamid Reza Mirzaei
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Hassan Hassani Bafrani
- Anatomical Sciences Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
| | - Amir Savardashtaki
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences Shiraz, Iran.
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, 40 Blossom Street, Boston, MA, 02114, USA.
| |
Collapse
|
189
|
Shao Y, Zhong P, Sheng L, Zheng H. Circular RNA circDENND2A protects H9c2 cells from oxygen glucose deprivation-induced apoptosis through sponging microRNA-34a. Cell Cycle 2019; 19:246-255. [PMID: 31878833 DOI: 10.1080/15384101.2019.1708029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Background/Aims: Myocardial ischemia (MI) is a serious threat to human health. Circular RNAs (circRNAs) play an important role in many diseases including MI. The effect and mechanism of circDENND2A in MI have not been studied.Methods: We used oxygen glucose deprivation (OGD) treatment to simulate MI in vitro. We detected circDENND2A and microRNA (miR)-34a levels by RT-qPCR. The transfection process used INTERFER and jetPRIME. Cell growth indexes including viability, apoptosis, and migration were detected by CCK8, flow cytometry, and transwell assays, respectively. In addition, the Bax, Cleaved-Caspase-3, matrix metalloproteinase (MMP)-2, MMP-9 and pathway-related protein levels were tested by Western blot.Results: OGD upregulated circDENND2A expression in H9c2 cells. Overexpression of circDENND2A enhanced cell viability and migration but declined apoptosis under OGD. Silenced circDENND 2A played the opposite effects. circDENND2A negatively regulated miR-34a. miR-34a overexpression weakened the protective effects of circDENND2A in OGD-injury. Moreover, we considered circDENND2A and miR-34a may work via β-catenin and Ras/Raf/MEK/ERK pathways.Conclusion: circDENND2A overexpression enhanced OGD-inhibited cell viability and migration but declined OGD-promoted apoptosis by downregulating miR-34a and via β-catenin and Ras/Raf/MEK/ERK pathways.
Collapse
Affiliation(s)
- Yuanxia Shao
- Department of Cardiology, Jining No.1 People's Hospital, Jining, Shandong, China
| | - Peng Zhong
- Department of Cardiology, Jining No.1 People's Hospital, Jining, Shandong, China
| | - Li Sheng
- Department of Cardiology, Jining No.1 People's Hospital, Jining, Shandong, China
| | - Hongjian Zheng
- Department of Cardiology, Jining No.1 People's Hospital, Jining, Shandong, China
| |
Collapse
|
190
|
Yan Z, Xiao Y, Chen Y, Luo G. Screening and identification of epithelial-to-mesenchymal transition-related circRNA and miRNA in prostate cancer. Pathol Res Pract 2019; 216:152784. [PMID: 31882179 DOI: 10.1016/j.prp.2019.152784] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/22/2019] [Accepted: 12/10/2019] [Indexed: 01/02/2023]
Abstract
Epithelial-to-mesenchymal transition (EMT) plays a vital role in the progression and metastasis of prostate cancer. However, the molecular mechanisms underlying prostate cancer metastasis are not fully demonstrated. In this study, EMT was induced by interferon-γ (IFN-γ) in PC-3M IE8 cells. High-throughput sequencing was used to screen the differentially expressed circular RNAs (circRNAs) and miRNAs in the cells with or without IFN-γ treatment. EMT-related circRNAs and miRNAs were further identified by quantitative real-time PCR (qPCR). In addition, the relationships among circRNAs, miRNAs, and mRNA were predicted. After cells were treated with IFN-γ, western blot analysis was conducted to detect the expression levels of EMT markers. E-cadherin expression levels were found to be downregulated, and Twist expression levels were found to be upregulated. Our results also found that IFN-γ promoted PC-3M IE8 cell migration and invasion, indicating that IFN-γ could induce EMT in PC-3M IE8 cells. Furthermore, high-throughput sequencing results revealed 827 upregulated and 1279 downregulated circRNAs and 39 upregulated and 2076 downregulated miRNAs in the IFN-γ group compared with the control group. KEGG analysis showed that both differentially expressed circRNAs and differentially expressed miRNAs were enriched in the MAPK signaling pathway related to EMT. Furthermore, the qPCR results revealed that the expression of hsa_circ_0001085, hsa_circ_0004916, hsa_circ_0001165, hsa-miR-196b-5p, and hsa-miR-187-3p in the IFN-γ group was consistent with the sequencing results. hsa_circ_0001165 and hsa_circ_0001085 were used to construct the network of circRNA-miRNA-mRNA. It was found that hsa_circ_0001165 may regulate TNF expression through hsa-miR-187-3p to induce EMT in prostate cancer cells. In addition, hsa_circ_0001085 may indirectly regulate the PI3K-Akt signaling and TGF-β signaling pathways through hsa-miR-196b-5p and the MAPK signaling pathway through has-miR-451a, which played a regulatory role in prostate cancer cells in the EMT induction model. The results obtained in this study lay the foundation for future study.
Collapse
Affiliation(s)
- Zhijian Yan
- Urology Department, Zhongshan Hospital Xiamen University, Xiamen, 361003, China
| | - Yiming Xiao
- Urology Department, Zhongshan Hospital Xiamen University, Xiamen, 361003, China
| | - Yiyan Chen
- Urology Department, Zhongshan Hospital Xiamen University, Xiamen, 361003, China
| | - Guangcheng Luo
- Urology Department, Zhongshan Hospital Xiamen University, Xiamen, 361003, China.
| |
Collapse
|
191
|
Shi X, Wang B, Feng X, Xu Y, Lu K, Sun M. circRNAs and Exosomes: A Mysterious Frontier for Human Cancer. MOLECULAR THERAPY. NUCLEIC ACIDS 2019; 19:384-392. [PMID: 31887549 PMCID: PMC6939016 DOI: 10.1016/j.omtn.2019.11.023] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/15/2019] [Accepted: 11/22/2019] [Indexed: 12/18/2022]
Abstract
Exosomes are nano-sized membrane-bound vesicles and contain active substances (DNA, noncoding RNA [ncRNA], protein), which provide a novel method of transferring effector messages between cells. Circular RNAs (circRNAs), a kind of ncRNA, have attracted increasing attention over the last decade given advances in whole-genome and transcriptome sequencing technologies. It has become increasingly clear that circRNAs regulate gene expression through various actions and play diverse roles in many fields of human cancer biology. Notably, several studies reported that circRNAs are enriched in exosomes and that exosomal circRNAs play an important role in cancer biology. Exosomal circRNAs can be taken up by neighboring or distant cells and affect many aspects of physiological and pathological conditions of the recipient cells, potentially promoting cell communication and tumor metastasis. Herein, we briefly review the molecular mechanisms of circRNAs and recent findings regarding exosomal circRNAs, and highlight the specific roles of exosomal circRNAs in human cancer.
Collapse
Affiliation(s)
- Xuefei Shi
- Department of Respiratory Medicine, Huzhou Hospital, Zhejiang University School of Medicine, Huzhou, People's Republic of China; Department of Respiratory Medicine, Huzhou Central Hospital, Huzhou, China
| | - Bin Wang
- Department of Respiratory Medicine, Huzhou Hospital, Zhejiang University School of Medicine, Huzhou, People's Republic of China; Department of Respiratory Medicine, Huzhou Central Hospital, Huzhou, China
| | - Xueren Feng
- Department of Respiratory Medicine, Huzhou Hospital, Zhejiang University School of Medicine, Huzhou, People's Republic of China; Department of Respiratory Medicine, Huzhou Central Hospital, Huzhou, China
| | - Yongcan Xu
- Department of General Surgery, Huzhou Hospital, Zhejiang University School of Medicine, Huzhou, China.
| | - Kaihua Lu
- Department of Oncology, First Affiliated Hospital, Nanjing Medical University, Nanjing, People's Republic of China.
| | - Ming Sun
- Department of Bioinformatics and Computational Biology, UT MD Anderson Cancer Center, Houston, TX, USA.
| |
Collapse
|
192
|
Yu AQ, Wang ZX, Wu W, Chen KY, Yan SR, Mao ZB. Circular RNA CircCCNB1 sponges micro RNA-449a to inhibit cellular senescence by targeting CCNE2. Aging (Albany NY) 2019; 11:10220-10241. [PMID: 31767812 PMCID: PMC6914408 DOI: 10.18632/aging.102449] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/04/2019] [Indexed: 12/14/2022]
Abstract
Circular RNAs (CircRNAs) are a novel subset of non-coding RNA widely present in eukaryotes that play a central role in physiological and pathological conditions. Accumulating evidence has indicated that CircRNAs participated in modulating tumorigenesis by acting as a competing endogenous RNA (CeRNA). However, the roles and functions of CircRNAs in cellular senescence and aging of organisms remain largely obscure. We performed whole transcriptome sequencing to compare the expression patterns of circular RNAs in young and prematurely senescent human diploid fibroblast 2BS cells, and identified senescence-associated circRNAs (SAC-RNAs). Among these SAC-RNAs, we observed the significantly downregulated expression of CircRNAs originating from exons 6 and 7 circularization of the cyclin B1 gene (CCNB1), termed CircCCNB1. Reduced CircCCNB1 expression triggered senescence in young 2BS cells, as measured by increased senescence associated-beta-galactosidase (SA-β-gal) activity, enhanced expression of cyclin-dependent kinase inhibitor 1A (CDKN1A)/P21 and tumor protein 53 (TP53) expression, and reduced cell proliferation. Mechanistically, reduced CircCCNB1 level inhibited cyclin E2 (CCNE2) expression by modulating micro RNA (miR)-449a activity, which repressed cellular proliferation. Our data suggested that CircCCNB1may serve as a sponge against miR-449a to delay cellular senescence by targeting CCNE2. Targeting CircCCNB1 may represent a promising strategy for aging and age-related disease interventions. Furthermore, we also identified and characterized several kinds of the CircCCNB1-binding proteins (CBPs), which may contribute to the degradation of CircCCNB1.
Collapse
Affiliation(s)
- Ai Qing Yu
- Peking University Research Center on Aging, Department of Biochemistry and Biophysics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Beijing 100191, China
| | - Zhi Xiao Wang
- Department of Cardiology, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China
| | - Wu Wu
- Department of Immunology, School of Basic Medical Science, Tianjing Medical University, Tianjing 300070, China
| | - Ke Yu Chen
- Peking University Research Center on Aging, Department of Biochemistry and Biophysics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Beijing 100191, China
| | - Shi Rong Yan
- Department of Cardiology, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China.,School of Pharmaceutical Sciences, Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan 442000, China
| | - Ze Bin Mao
- Peking University Research Center on Aging, Department of Biochemistry and Biophysics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Beijing 100191, China
| |
Collapse
|
193
|
Wang Z, Lei X, Wu FX. Identifying Cancer-Specific circRNA-RBP Binding Sites Based on Deep Learning. Molecules 2019; 24:E4035. [PMID: 31703384 PMCID: PMC6891306 DOI: 10.3390/molecules24224035] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 10/25/2019] [Accepted: 11/06/2019] [Indexed: 12/17/2022] Open
Abstract
Circular RNAs (circRNAs) are extensively expressed in cells and tissues, and play crucial roles in human diseases and biological processes. Recent studies have reported that circRNAs could function as RNA binding protein (RBP) sponges, meanwhile RBPs can also be involved in back-splicing. The interaction with RBPs is also considered an important factor for investigating the function of circRNAs. Hence, it is necessary to understand the interaction mechanisms of circRNAs and RBPs, especially in human cancers. Here, we present a novel method based on deep learning to identify cancer-specific circRNA-RBP binding sites (CSCRSites), only using the nucleotide sequences as the input. In CSCRSites, an architecture with multiple convolution layers is utilized to detect the features of the raw circRNA sequence fragments, and further identify the binding sites through a fully connected layer with the softmax output. The experimental results show that CSCRSites outperform the conventional machine learning classifiers and some representative deep learning methods on the benchmark data. In addition, the features learnt by CSCRSites are converted to sequence motifs, some of which can match to human known RNA motifs involved in human diseases, especially cancer. Therefore, as a deep learning-based tool, CSCRSites could significantly contribute to the function analysis of cancer-associated circRNAs.
Collapse
Affiliation(s)
- Zhengfeng Wang
- School of Computer Science, Shaanxi Normal University, Xi’an 710119, China;
- College of Information Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Xiujuan Lei
- School of Computer Science, Shaanxi Normal University, Xi’an 710119, China;
| | - Fang-Xiang Wu
- Department of Mechanical Engineering and Division of Biomedical Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada;
| |
Collapse
|
194
|
Xiao Q, Luo J, Dai J. Computational Prediction of Human Disease- Associated circRNAs Based on Manifold Regularization Learning Framework. IEEE J Biomed Health Inform 2019; 23:2661-2669. [DOI: 10.1109/jbhi.2019.2891779] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
195
|
Harper KL, Mcdonnell E, Whitehouse A. CircRNAs: From anonymity to novel regulators of gene expression in cancer (Review). Int J Oncol 2019; 55:1183-1193. [PMID: 31661122 DOI: 10.3892/ijo.2019.4904] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 07/31/2019] [Indexed: 12/27/2022] Open
Abstract
Circular RNAs (circRNAs) are a group of non‑coding RNAs, formed mostly through a unique backsplicing mechanism. Originally proposed to be a by‑product from errors in splicing, recent studies have shown they exhibit a range of roles in regulating gene expression, including sponging of microRNAs (miRNAs), interactions with RNA‑binding proteins and regulation of transcription. Though research is still in its infancy, evidence suggests circRNA levels are tightly regulated in the cell, reinforced by dysregulated circRNAs levels being implicated in a range of diseases, including cancer and viral infection. There is growing interest in circRNAs playing specific roles in cancers, either oncogenic or as tumour suppressors, with particular focus on their potential as novel biomarkers. This review will provide an overview of circRNA biogenesis and regulation, and their potential roles in the cell, with a focus on their dysregulation in cancer.
Collapse
Affiliation(s)
- Katherine L Harper
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Euan Mcdonnell
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Adrian Whitehouse
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| |
Collapse
|
196
|
Ji T, Chen Q, Tao S, Shi Y, Chen Y, Shen L, Wang C, Yu L. The research progress of circular RNAs in hematological malignancies. Hematology 2019; 24:727-731. [PMID: 31581903 DOI: 10.1080/16078454.2019.1669924] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Tingting Ji
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Qiuni Chen
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Shandong Tao
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Yuye Shi
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Yue Chen
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Li Shen
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Chunling Wang
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| | - Liang Yu
- Department of Hematology, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an, People’s Republic of China
- Key Laboratory of Hematology of Nanjing Medical University, Nanjing, People’s Republic of China
| |
Collapse
|
197
|
Zhang Y, Chen Y, Yao H, Lie Z, Chen G, Tan H, Zhou Y. Elevated serum circ_0068481 levels as a potential diagnostic and prognostic indicator in idiopathic pulmonary arterial hypertension. Pulm Circ 2019; 9:2045894019888416. [PMID: 31827769 PMCID: PMC6886280 DOI: 10.1177/2045894019888416] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 10/18/2019] [Indexed: 12/12/2022] Open
Abstract
Circular RNAs have continuous, stable, and covalently closed circular structures and are not easily degraded by nucleases, thus they are ideal serum biomarkers for detecting diseases. However, research is still lacking on circular RNAs as diagnostic and prognostic markers for idiopathic pulmonary arterial hypertension. This study investigated the potential role of serum circ_0068481 levels in idiopathic pulmonary arterial hypertension diagnosis and prognosis. This prospective cohort study enrolled 82 patients with idiopathic pulmonary arterial hypertension between January 2016 and July 2018 at Guangdong Provincial People's Hospital. Serum circ_0068481 levels were measured using quantitative reverse transcription-polymerase chain reaction. Baseline data, including clinical background, hemodynamic variables, and biochemical variables, were collected. Receiver operating characteristic curves were used to investigate diagnostic effect, the Kaplan-Meier method was used to estimate survival rates, and univariate analysis of prognostic factors was performed with a Cox proportional hazard model. We found that serum circ_0068481 expression levels were significantly higher in patients with idiopathic pulmonary arterial hypertension and had higher sensitivity and specificity for predicting idiopathic pulmonary arterial hypertension. Additionally, we found that circ_0068481 expression correlated significantly with heart function, 6-min walk distance, serum N-terminal pro-B-type natriuretic peptide, serum H2S, the 6th World Symposium on Pulmonary Hypertension risk stratification, right heart failure, and patient death. Moreover, serum circ_0068481 levels were elevated in patients with idiopathic pulmonary arterial hypertension and right heart failure and were able to predict right heart failure. Serum circ_0068481 levels were also elevated in patients who died with idiopathic pulmonary arterial hypertension and were able to predict poorer clinical outcomes. Circ_0068481 is a novel and noninvasive biomarker for diagnosing idiopathic pulmonary arterial hypertension and predicting poor clinical outcome in patients with idiopathic pulmonary arterial hypertension.
Collapse
Affiliation(s)
- Ying Zhang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
- Guangdong Provincial People's Hospital Zhuhai Hospital (Zhuhai Golden Bay Center Hospital), Zhuhai, P.R. China
| | - Yongbin Chen
- Department of cardiac surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Hua Yao
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Zhenbang Lie
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Guo Chen
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Hong Tan
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Yingling Zhou
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
- Guangdong Provincial People's Hospital Zhuhai Hospital (Zhuhai Golden Bay Center Hospital), Zhuhai, P.R. China
| |
Collapse
|
198
|
Ying X, Zhu J, Zhang Y. Circular RNA circ-TSPAN4 promotes lung adenocarcinoma metastasis by upregulating ZEB1 via sponging miR-665. Mol Genet Genomic Med 2019; 7:e991. [PMID: 31573758 PMCID: PMC6900391 DOI: 10.1002/mgg3.991] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/31/2019] [Accepted: 09/03/2019] [Indexed: 12/20/2022] Open
Abstract
Background Cancer metastasis is responsible for 90% of cancer‐related deaths. Recently, circular RNA (circRNA) is deemed to be an important regulator of cancer progression. However, little is known about the role of circRNA in the metastasis of lung adenocarcinoma (LUAD). Herein, we investigated the clinical implication and regulatory effect of circ‐TSPAN4 (hsa_circ_0020732) in LUAD. Methods Gene Expression Omnibus (GEO) database (http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE104854) was used to identify the aberrantly expressed circRNAs in LUAD. The expression levels of circ‐TSPAN4, miR‐4731‐5p, miR‐665, and ZEB1 were determined by quantitative reverse transcription PCR (qRT‐PCR). The functional experiments were carried out with wound healing and transwell assays. And, the luciferase reporter and RNA pull‐down assays were employed to examine the crosstalk between circ‐TSPAN4, miR‐665, and ZEB1. In vivo metastasis experiment was tested by the lung metastasis model. Results Circ‐TSPAN4 was significantly upregulated in LUAD tissues and cell lines. The increased circ‐TSPAN4 was linked to advanced tumor‐node‐metastasis stage, lymph node and distant metastasis, and poor outcome. Lentivirus‐mediated stably circ‐TSPAN4 knockdown dramatically attenuated the metastatic ability of LUAD cells both in vitro and in vivo. Mechanistically, circ‐TSPAN4 directly interacted with miR‐665, but not miR‐4731‐5p, to increase the expression of ZEB1, which is a well‐known metastasis trigger. Importantly, the reduced metastatic capacity caused by circ‐TSPAN4 depletion was partially rescued by miR‐665 silencing or ZEB1 overexpression. Conclusions Circ‐TSPAN4 plays a pivotal metastasis‐promoting role in LUAD through acting as a sponge for miR‐665 and upregulating ZEB1.
Collapse
Affiliation(s)
- Xiwang Ying
- Department of Respiratory Medicine, Hangzhou Third People's Hospital, Hangzhou, Zhejiang, China
| | - Jianwei Zhu
- Department of Medical Oncology, Hangzhou Cancer Hospital, Hangzhou, Zhejiang, China
| | - Yuanhui Zhang
- Department of Medical Oncology, Hangzhou Cancer Hospital, Hangzhou, Zhejiang, China
| |
Collapse
|
199
|
Yue B, Wang J, Song C, Wu J, Cao X, Huang Y, Lan X, Lei C, Huang B, Chen H. Biogenesis and ceRNA role of circular RNAs in skeletal muscle myogenesis. Int J Biochem Cell Biol 2019; 117:105621. [PMID: 31568883 DOI: 10.1016/j.biocel.2019.105621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 01/22/2023]
Abstract
Circular RNAs (circRNAs) are novel endogenous non-coding RNAs that are generated by reverse-splicing of precursor mRNA derived from various genes in mammals. Despite low expression, recent studies have shown that circRNA plays an important role in skeletal muscle myogenesis with competing endogenous RNA (ceRNA) functions. However, the potential regulatory role of circRNAs and interactions with miRNAs remain largely unexplored, and the function of circRNAs as miRNA sponges is not yet generally accepted. In this review, we outline the biogenesis and ceRNA mechanisms of circRNAs as well as their involvement in skeletal muscle myogenesis and discuss the conflicting conclusions of recent circRNA-ceRNA studies.
Collapse
Affiliation(s)
- Binglin Yue
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jian Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chengchuang Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jiyao Wu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xiukai Cao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yongzheng Huang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xianyong Lan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chuzhao Lei
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Bizhi Huang
- Yunnan Academy of Grassland and Animal Science, Kunming, Yunnan 650212, China
| | - Hong Chen
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|
200
|
Lu X, Yu Y, Liao F, Tan S. Homo Sapiens Circular RNA 0079993 (hsa_circ_0079993) of the POLR2J4 Gene Acts as an Oncogene in Colorectal Cancer Through the microRNA-203a-3p.1 and CREB1 Axis. Med Sci Monit 2019; 25:6872-6883. [PMID: 31515467 PMCID: PMC6755939 DOI: 10.12659/msm.916064] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Background Worldwide, dietary changes have resulted in an increased incidence of colorectal cancer (CRC). Circular RNAs (circRNAs) are involved in tumorigenesis of several human tumors, but their role in CRC remains unknown. This study aimed to investigate the expression and effects of Homo sapiens (hsa)_circ_0079993 of POLR2J4 and its impact on CRC. Material/Methods Paired CRC tissue and adjacent normal colorectal tissue samples (N=41), and HCT116 and SW620 human CRC cells were studied. The expression of circ_0079993 and its parental gene, POLR2J4, were examined using quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Two small-interfering RNAs (siRNAs) against circ_0079993 were used to silence circ_0079993 expression in HCT116 and SW620 CRC cells. Cell proliferation was evaluated using the cell counting kit-8 (CCK-8) assay, colony formation, and in vivo tumor growth assays. The target miRNAs of circ_0079993 was predicted using TargetScan, and the interaction between circ_0079993 and its target miRNAs were verified by the dual-luciferase reporter (DLR) assay. Results In CRC tissue POLR2J4 expression was reduced, and circ_0079993 expression was increased compared with normal tissue. Knockdown of circ_0079993 significantly inhibited the proliferation of CRC cells in vitro. Also, circ_0079993 was predicted to sponge multiple miRNAs, miR-203a-3p.1 was verified as a target of circ_0079993, and circ_0079993 indirectly regulated mRNA expression of the CREB1 gene by sponging miR-203a-3p.1 in CRC cells. The use of anti-miR-203a-3p.1 reversed the inhibitory effects of circ_0079993 knockdown on CRC cell proliferation. Conclusions The findings supported that hsa_circ_0079993 acts as an oncogene in CRC through the miRNA-203a-3p.1/CREB1 axis.
Collapse
Affiliation(s)
- Xiaohong Lu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Digestive System Disease, Wuhan, Hubei, China (mainland)
| | - Yuanjie Yu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Digestive System Disease, Wuhan, Hubei, China (mainland)
| | - Fei Liao
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Digestive System Disease, Wuhan, Hubei, China (mainland)
| | - Shiyun Tan
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Digestive System Disease, Wuhan, Hubei, China (mainland)
| |
Collapse
|