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Sabbaghian M, Gheitasi H, Fadaee M, Javadi Henafard H, Tavakoli A, Shekarchi AA, Poortahmasebi V. Human cytomegalovirus microRNAs: strategies for immune evasion and viral latency. Arch Virol 2024; 169:157. [PMID: 38969819 DOI: 10.1007/s00705-024-06080-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 05/17/2024] [Indexed: 07/07/2024]
Abstract
Viruses use various strategies and mechanisms to deal with cells and proteins of the immune system that form a barrier against infection. One of these mechanisms is the encoding and production of viral microRNAs (miRNAs), whose function is to regulate the gene expression of the host cell and the virus, thus creating a suitable environment for survival and spreading viral infection. miRNAs are short, single-stranded, non-coding RNA molecules that can regulate the expression of host and viral proteins, and due to their non-immunogenic nature, they are not eliminated by the cells of the immune system. More than half of the viral miRNAs are encoded and produced by Orthoherpesviridae family members. Human cytomegalovirus (HCMV) produces miRNAs that mediate various processes in infected cells to contribute to HCMV pathogenicity, including immune escape, viral latency, and cell apoptosis. Here, we discuss which cellular and viral proteins or cellular pathways and processes these mysterious molecules target to evade immunity and support viral latency in infected cells. We also discuss current evidence that their function of bypassing the host's innate and adaptive immune system is essential for the survival and multiplication of the virus and the spread of HCMV infection.
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Affiliation(s)
- Mohammad Sabbaghian
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamidreza Gheitasi
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Manouchehr Fadaee
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Science, Tabriz, Iran
| | | | - Ahmad Tavakoli
- Research Center of Pediatric Infectious Diseases, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Akbar Shekarchi
- Department of Pathology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahdat Poortahmasebi
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran.
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2
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Molinero M, Perez-Pons M, González J, Barbé F, de Gonzalo-Calvo D. Decoding viral and host microRNA signatures in airway-derived biosamples: Insights for biomarker discovery in viral respiratory infections. Biomed Pharmacother 2024; 177:116984. [PMID: 38908203 DOI: 10.1016/j.biopha.2024.116984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 06/12/2024] [Accepted: 06/15/2024] [Indexed: 06/24/2024] Open
Abstract
The global public health crisis caused by the COVID-19 pandemic has intensified the global concern regarding viral respiratory tract infections. Despite their considerable impact on health, society and the economy, effective management of these conditions remains a significant challenge. Integrating high-throughput analyses is pivotal for early detection, prognostication of adverse outcomes, elucidating pathogenetic pathways and developing therapeutic approaches. In recent years, microRNAs (miRNAs), a subset of small noncoding RNAs (ncRNAs), have emerged as promising tools for molecular phenotyping. Current evidence suggests that miRNAs could serve as innovative biological markers, aiding in informed medical decision-making. The cost-effective quantification of miRNAs in standardized samples using techniques routinely employed in clinical laboratories has become feasible. In this context, samples obtained from the airways represent a valuable source of information due to their direct exposure to the infectious agent and host response within the respiratory tract. This review explores viral and host miRNA profiling in airway-derived biosamples as a source of molecular information to guide patient management, with a specific emphasis on SARS-CoV-2 infection.
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Affiliation(s)
- Marta Molinero
- Translational Research in Respiratory Medicine, University Hospital Arnau de Vilanova and Santa Maria, IRBLleida, Lleida, Spain; CIBER of Respiratory Diseases (CIBERES), Institute of Health Carlos III, Madrid, Spain
| | - Manel Perez-Pons
- Translational Research in Respiratory Medicine, University Hospital Arnau de Vilanova and Santa Maria, IRBLleida, Lleida, Spain; CIBER of Respiratory Diseases (CIBERES), Institute of Health Carlos III, Madrid, Spain
| | - Jessica González
- Translational Research in Respiratory Medicine, University Hospital Arnau de Vilanova and Santa Maria, IRBLleida, Lleida, Spain; CIBER of Respiratory Diseases (CIBERES), Institute of Health Carlos III, Madrid, Spain
| | - Ferran Barbé
- Translational Research in Respiratory Medicine, University Hospital Arnau de Vilanova and Santa Maria, IRBLleida, Lleida, Spain; CIBER of Respiratory Diseases (CIBERES), Institute of Health Carlos III, Madrid, Spain
| | - David de Gonzalo-Calvo
- Translational Research in Respiratory Medicine, University Hospital Arnau de Vilanova and Santa Maria, IRBLleida, Lleida, Spain; CIBER of Respiratory Diseases (CIBERES), Institute of Health Carlos III, Madrid, Spain.
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Bharti R, Calabrese DR. Innate and adaptive effector immune drivers of cytomegalovirus disease in lung transplantation: a double-edged sword. FRONTIERS IN TRANSPLANTATION 2024; 3:1388393. [PMID: 38993763 PMCID: PMC11235306 DOI: 10.3389/frtra.2024.1388393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/24/2024] [Indexed: 07/13/2024]
Abstract
Up to 90% of the global population has been infected with cytomegalovirus (CMV), a herpesvirus that remains latent for the lifetime of the host and drives immune dysregulation. CMV is a critical risk factor for poor outcomes after solid organ transplant, though lung transplant recipients (LTR) carry the highest risk of CMV infection, and CMV-associated comorbidities compared to recipients of other solid organ transplants. Despite potent antivirals, CMV remains a significant driver of chronic lung allograft dysfunction (CLAD), re-transplantation, and death. Moreover, the extended utilization of CMV antiviral prophylaxis is not without adverse effects, often necessitating treatment discontinuation. Thus, there is a critical need to understand the immune response to CMV after lung transplantation. This review identifies key elements of each arm of the CMV immune response and highlights implications for lung allograft tolerance and injury. Specific attention is paid to cellular subsets of adaptive and innate immune cells that are important in the lung during CMV infection and reactivation. The concept of heterologous immune responses is reviewed in depth, including how they form and how they may drive tissue- and allograft-specific immunity. Other important objectives of this review are to detail the emerging role of NK cells in CMV-related outcomes, in addition to discussing perturbations in CMV immune function stemming from pre-existing lung disease. Finally, this review identifies potential mechanisms whereby CMV-directed treatments may alter the cellular immune response within the allograft.
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Affiliation(s)
- Reena Bharti
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Daniel R. Calabrese
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
- Department of Medicine, San Francisco Veterans Affairs Medical Center, San Francisco, CA, United States
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4
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Wei X, Tang J, Lin C, Jiang X. Review: Non-canonical role of Drosha ribonuclease III. Int J Biol Macromol 2023; 253:127202. [PMID: 37793530 DOI: 10.1016/j.ijbiomac.2023.127202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 09/28/2023] [Accepted: 09/30/2023] [Indexed: 10/06/2023]
Abstract
The typical function of Drosha is participating in cleaving pri-miRNA, the initial step of miRNA biogenesis, in the nucleus. Since Drosha has a double-stranded RNA-binding domain and two RNase III domains, when it binds and/or cleaves other RNA species other than pri-miRNA, Drosha is able to induce a variety of novel biological effects. Moreover, by interacting with other protein, Drosha is able to modify the function of other protein complexes. Recently, diverse non-classical functions of Drosha have been demonstrated, such as promoting DNA damage repair, transcriptional activation and inhibition, pre-mRNA splicing regulation, mRNA destabilization, and virus-host interaction. In this review, we describe these newly discovered functions of Drosha in order to present a panoramic picture of the novel biological processes that Drosha is involved in.
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Affiliation(s)
- Xuanshuo Wei
- Shenzhen Key Laboratory for Systems Medicine in Inflammatory Diseases, School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Jin Tang
- Shenzhen Key Laboratory for Systems Medicine in Inflammatory Diseases, School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Chuwen Lin
- Shenzhen Key Laboratory for Systems Medicine in Inflammatory Diseases, School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Xuan Jiang
- Shenzhen Key Laboratory for Systems Medicine in Inflammatory Diseases, School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China.
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Nappi F, Alzamil A, Avtaar Singh SS, Spadaccio C, Bonnet N. Current Knowledge on the Interaction of Human Cytomegalovirus Infection, Encoded miRNAs, and Acute Aortic Syndrome. Viruses 2023; 15:2027. [PMID: 37896804 PMCID: PMC10611417 DOI: 10.3390/v15102027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/21/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023] Open
Abstract
Aortic dissection is a clinicopathological entity caused by rupture of the intima, leading to a high mortality if not treated. Over time, diagnostic and investigative methods, antihypertensive therapy, and early referrals have resulted in improved outcomes according to registry data. Some data have also emerged from recent studies suggesting a link between Human Cytomegalovirus (HCMV) infection and aortic dissection. Furthermore, the use of microRNAs has also become increasingly widespread in the literature. These have been noted to play a role in aortic dissections with elevated levels noted in studies as early as 2017. This review aims to provide a broad and holistic overview of the role of miRNAs, while studying the role of HCMV infection in the context of aortic dissections. The roles of long non-coding RNAs, circular RNAs, and microRNAs are explored to identify changes in expression during aortic dissections. The use of such biomarkers may one day be translated into clinical practice to allow early detection and prognostication of outcomes and drive preventative and therapeutic options in the future.
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Affiliation(s)
- Francesco Nappi
- Department of Cardiac Surgery, Centre Cardiologique du Nord, 93200 Saint-Denis, France; (A.A.); (N.B.)
| | - Almothana Alzamil
- Department of Cardiac Surgery, Centre Cardiologique du Nord, 93200 Saint-Denis, France; (A.A.); (N.B.)
| | | | - Cristiano Spadaccio
- Department of Cardiothoracic Surgery, Mayo Clinic, Rochester, Rochester, MN 55905, USA;
| | - Nicolas Bonnet
- Department of Cardiac Surgery, Centre Cardiologique du Nord, 93200 Saint-Denis, France; (A.A.); (N.B.)
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6
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Yu C, He S, Zhu W, Ru P, Ge X, Govindasamy K. Human cytomegalovirus in cancer: the mechanism of HCMV-induced carcinogenesis and its therapeutic potential. Front Cell Infect Microbiol 2023; 13:1202138. [PMID: 37424781 PMCID: PMC10327488 DOI: 10.3389/fcimb.2023.1202138] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/08/2023] [Indexed: 07/11/2023] Open
Abstract
Cancer is one of the leading causes of death worldwide. Human cytomegalovirus (HCMV), a well-studied herpesvirus, has been implicated in malignancies derived from breast, colorectal muscle, brain, and other cancers. Intricate host-virus interactions are responsible for the cascade of events that have the potential to result in the transformed phenotype of normal cells. The HCMV genome contains oncogenes that may initiate these types of cancers, and although the primary HCMV infection is usually asymptomatic, the virus remains in the body in a latent or persistent form. Viral reactivation causes severe health issues in immune-compromised individuals, including cancer patients, organ transplants, and AIDS patients. This review focuses on the immunologic mechanisms and molecular mechanisms of HCMV-induced carcinogenesis, methods of HCMV treatment, and other studies. Studies show that HCMV DNA and virus-specific antibodies are present in many types of cancers, implicating HCMV as an important player in cancer progression. Importantly, many clinical trials have been initiated to exploit HCMV as a therapeutic target for the treatment of cancer, particularly in immunotherapy strategies in the treatment of breast cancer and glioblastoma patients. Taken together, these findings support a link between HCMV infections and cellular growth that develops into cancer. More importantly, HCMV is the leading cause of birth defects in newborns, and infection with HCMV is responsible for abortions in pregnant women.
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Affiliation(s)
- Chuan Yu
- Animal Diseases and Public Health Engineering Research Center of Henan Province, Luoyang Polytechnic, Luoyang, Henan, China
| | - Suna He
- Department of Pharmaceutical Sciences, School of Basic Medical Sciences, Henan University of Science and Technology, Luoyang, Henan, China
| | - Wenwen Zhu
- Animal Diseases and Public Health Engineering Research Center of Henan Province, Luoyang Polytechnic, Luoyang, Henan, China
| | - Penghui Ru
- Animal Diseases and Public Health Engineering Research Center of Henan Province, Luoyang Polytechnic, Luoyang, Henan, China
| | - Xuemei Ge
- School of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Kavitha Govindasamy
- School of Arts and Science, Rutgers, the State University of New Jersey, Newark, NJ, United States
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7
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Ruivinho C, Gama-Carvalho M. Small non-coding RNAs encoded by RNA viruses: old controversies and new lessons from the COVID-19 pandemic. Front Genet 2023; 14:1216890. [PMID: 37415603 PMCID: PMC10322155 DOI: 10.3389/fgene.2023.1216890] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/07/2023] [Indexed: 07/08/2023] Open
Abstract
The recurring outbreaks caused by emerging RNA viruses have fostered an increased interest in the research of the mechanisms that regulate viral life cycles and the pathological outcomes associated with infections. Although interactions at the protein level are well-studied, interactions mediated by RNA molecules are less explored. RNA viruses can encode small non-coding RNAs molecules (sncRNAs), including viral miRNAs (v-miRNAs), that play important roles in modulating host immune responses and viral replication by targeting viral or host transcripts. Starting from the analysis of public databases compiling the known repertoire of viral ncRNA molecules and the evolution of publications and research interests on this topic in the wake of the COVID-19 pandemic, we provide an updated view on the current knowledge on viral sncRNAs, with a focus on v-miRNAs encoded by RNA viruses, and their mechanisms of action. We also discuss the potential of these molecules as diagnostic and prognostic biomarkers for viral infections and the development of antiviral therapies targeting v-miRNAs. This review emphasizes the importance of continued research efforts to characterize sncRNAs encoded by RNA viruses, identifies the most relevant pitfalls in the study of these molecules, and highlights the paradigm changes that have occurred in the last few years regarding their biogenesis, prevalence and functional relevance in the context of host-pathogen interactions.
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8
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Murray MJ, Bradley E, Ng Y, Thomas O, Patel K, Angus C, Atkinson C, Reeves MB. In silico interrogation of the miRNAome of infected hematopoietic cells to predict processes important for human cytomegalovirus latent infection. J Biol Chem 2023; 299:104727. [PMID: 37080390 PMCID: PMC10206818 DOI: 10.1016/j.jbc.2023.104727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 04/14/2023] [Accepted: 04/16/2023] [Indexed: 04/22/2023] Open
Abstract
Human cytomegalovirus (HCMV) latency in CD34+ progenitor cells is the outcome of a complex and continued interaction of virus and host that is initiated during very early stages of infection and reflects pro- and anti-viral activity. We hypothesized that a key event during early infection could involve changes to host miRNAs, allowing for rapid modulation of the host proteome. Here, we identify 72 significantly upregulated miRNAs and three that were downregulated by 6hpi of infection of CD34+ cells which were then subject to multiple in silico analyses to identify potential genes and pathways important for viral infection. The analyses focused on the upregulated miRNAs and were used to predict potential gene hubs or common mRNA targets of multiple miRNAs. Constitutive deletion of one target, the transcriptional regulator JDP2, resulted in a defect in latent infection of myeloid cells; interestingly, transient knockdown in differentiated dendritic cells resulted in increased viral lytic IE gene expression, arguing for subtle differences in the role of JDP2 during latency establishment and reactivation of HCMV. Finally, in silico predictions identified clusters of genes with related functions (such as calcium signaling, ubiquitination, and chromatin modification), suggesting potential importance in latency and reactivation. Consistent with this hypothesis, we demonstrate that viral IE gene expression is sensitive to calcium channel inhibition in reactivating dendritic cells. In conclusion, we demonstrate HCMV alters the miRNAome rapidly upon infection and that in silico interrogation of these changes reveals new insight into mechanisms controlling viral gene expression during HCMV latency and, intriguingly, reactivation.
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Affiliation(s)
- M J Murray
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom.
| | - E Bradley
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom
| | - Y Ng
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom
| | - O Thomas
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom
| | - K Patel
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom
| | - C Angus
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom
| | - C Atkinson
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom
| | - M B Reeves
- Institute of Immunity & Transplantation, Division of Infection & Immunity, Royal Free Campus, UCL, London, United Kingdom.
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9
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Diggins NL, Hancock MH. Viral miRNA regulation of host gene expression. Semin Cell Dev Biol 2022; 146:2-19. [PMID: 36463091 PMCID: PMC10101914 DOI: 10.1016/j.semcdb.2022.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 12/05/2022]
Abstract
Viruses have evolved a multitude of mechanisms to combat barriers to productive infection in the host cell. Virally-encoded miRNAs are one such means to regulate host gene expression in ways that benefit the virus lifecycle. miRNAs are small non-coding RNAs that regulate protein expression but do not trigger the adaptive immune response, making them powerful tools encoded by viruses to regulate cellular processes. Diverse viruses encode for miRNAs but little sequence homology exists between miRNAs of different viral species. Despite this, common cellular pathways are targeted for regulation, including apoptosis, immune evasion, cell growth and differentiation. Herein we will highlight the viruses that encode miRNAs and provide mechanistic insight into how viral miRNAs aid in lytic and latent infection by targeting common cellular processes. We also highlight how viral miRNAs can mimic host cell miRNAs as well as how viral miRNAs have evolved to regulate host miRNA expression. These studies dispel the myth that viral miRNAs are subtle regulators of gene expression, and highlight the critical importance of viral miRNAs to the virus lifecycle.
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Affiliation(s)
- Nicole L Diggins
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Portland, OR, USA
| | - Meaghan H Hancock
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Portland, OR, USA.
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10
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Herb S, Zeleznjak J, Hennig T, L'Hernault A, Lodha M, Jürges C, Trsan T, Juranic Lisnic V, Jonjic S, Erhard F, Krmpotic A, Dölken L. Two murine cytomegalovirus microRNAs target the major viral immediate early 3 gene. J Gen Virol 2022; 103. [DOI: 10.1099/jgv.0.001804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Human cytomegalovirus is responsible for morbidity and mortality in immune compromised patients and is the leading viral cause of congenital infection. Virus-encoded microRNAs (miRNAs) represent interesting targets for novel antiviral agents. While many cellular targets that augment productive infection have been identified in recent years, regulation of viral genes such as the major viral immediate early protein 72 (IE72) by hcmv-miR-UL112-1 may contribute to both the establishment and the maintenance of latent infection. We employed photoactivated ribonucleotide-enhanced individual nucleotide resolution crosslinking (PAR-iCLIP) to identify murine cytomegalovirus (MCMV) miRNA targets during lytic infection. While the PAR-iCLIP data were of insufficient quality to obtain a comprehensive list of cellular and viral miRNA targets, the most prominent PAR-iCLIP peak in the MCMV genome mapped to the 3′ untranslated region of the major viral immediate early 3 (ie3) transcript. We show that this results from two closely positioned binding sites for the abundant MCMV miRNAs miR-M23-2-3p and miR-m01-2-3p. Their pre-expression significantly impaired viral plaque formation. However, mutation of the respective binding sites did not alter viral fitness during acute or subacute infection in vivo. Furthermore, no differences in the induction of virus-specific CD8+ T cells were observed. Future studies will probably need to go beyond studying immunocompetent laboratory mice housed in pathogen-free conditions to reveal the functional relevance of viral miRNA-mediated regulation of key viral immediate early genes.
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Affiliation(s)
- Stefanie Herb
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacherstr. 7, 97078, Würzburg, Germany
| | - Jelena Zeleznjak
- Department of Histology and Embryology/Center for Proteomics, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51 000 Rijeka, Croatia
| | - Thomas Hennig
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacherstr. 7, 97078, Würzburg, Germany
| | - Anne L'Hernault
- Department of Medicine, University of Cambridge, Box 157, Addenbrookes Hospital, Hills Road, Cambridge CB2 0QQ, UK
| | - Manivel Lodha
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacherstr. 7, 97078, Würzburg, Germany
| | - Christopher Jürges
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacherstr. 7, 97078, Würzburg, Germany
| | - Tihana Trsan
- Department of Histology and Embryology/Center for Proteomics, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51 000 Rijeka, Croatia
| | - Vanda Juranic Lisnic
- Department of Histology and Embryology/Center for Proteomics, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51 000 Rijeka, Croatia
| | - Stipan Jonjic
- Department of Histology and Embryology/Center for Proteomics, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51 000 Rijeka, Croatia
| | - Florian Erhard
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacherstr. 7, 97078, Würzburg, Germany
| | - Astrid Krmpotic
- Department of Histology and Embryology/Center for Proteomics, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51 000 Rijeka, Croatia
| | - Lars Dölken
- Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz-Center for Infection Research (HZI), 97080 Würzburg, Germany
- Institute for Virology and Immunobiology, Julius-Maximilians-University Würzburg, Versbacherstr. 7, 97078, Würzburg, Germany
- Department of Medicine, University of Cambridge, Box 157, Addenbrookes Hospital, Hills Road, Cambridge CB2 0QQ, UK
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11
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Sleman S, Hao H, Najmuldeen H, Jalal P, Saeed N, Othman D, Qian Z. Human Cytomegalovirus UL24 and UL43 Cooperate to Modulate the Expression of Immunoregulatory UL16 Binding Protein 1. Viral Immunol 2022; 35:529-544. [PMID: 36179070 DOI: 10.1089/vim.2022.0041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The human cytomegalovirus (HCMV) UL24 and UL43 are tegument proteins that have recently been shown to interact with each other in a yeast two-hybrid system. By their overexpression in MRC5 cells, we demonstrate that these viral proteins interact with several important host proteins, especially Dicer and trans-activation response RNA binding protein. As these hots proteins are involved in regulating the production of cellular micro-RNAs, the cytomegalovirus (CMV) proteins could interfere with their actions to favor viral replication directly or through an immune escape mechanism. Double knockout of UL24 and UL43 does not show a remarkable effect on CMV entry or replication, but it significantly downregulates the expression of CMV-encoded miR-UL59, which is thought to regulate the expression of a downstream target UL16 binding protein 1 (ULBP1). Interestingly, the double knockout increases the expression of the ULBP1 recognized by the NKG2D activating receptor of natural killer cells. This study investigates the potential role of several proteins encoded by HCMV in regulating the host cellular environment to favor escape from immunity, and it also provides some basis for the future development of RNA-targeted small molecules to control HCMV infection.
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Affiliation(s)
- Sirwan Sleman
- College of Veterinary Medicine, University of Sulaimani, Sulaymaniyah, Iraq.,Medical Laboratory Analysis, College of Health Science, Cihan University of Sulaimaniya, Sulaymaniyah, Iraq.,Unit of Herpesvirus and Molecular Virology, Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Hongyun Hao
- Unit of Herpesvirus and Molecular Virology, Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Hastyar Najmuldeen
- Medical Laboratory Analysis, College of Health Science, Cihan University of Sulaimaniya, Sulaymaniyah, Iraq.,Biology Department, College of Sciences, University of Sulaimani, Sulaymaniyah, Iraq
| | - Paywast Jalal
- Biology Department, College of Sciences, University of Sulaimani, Sulaymaniyah, Iraq
| | - Nahla Saeed
- College of Veterinary Medicine, University of Sulaimani, Sulaymaniyah, Iraq
| | - Dyary Othman
- College of Veterinary Medicine, University of Sulaimani, Sulaymaniyah, Iraq
| | - Zhikang Qian
- Unit of Herpesvirus and Molecular Virology, Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
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12
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Afshari A, Yaghobi R, Golshan M. Cytomegalovirus microRNAs level determination in kidney recipients post transplantation. Virol J 2022; 19:147. [PMID: 36096838 PMCID: PMC9465962 DOI: 10.1186/s12985-022-01880-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 09/08/2022] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Human cytomegalovirus (CMV) can establish a latent infection with periodic or sporadic reactivation after the first infection happens. Primary and recurrent infection, results in different problems in patients with impaired or immature immune systems, such as kidney transplant recipients (KTRs). MicroRNAs (miRNAs, miRs) are important regulatory molecules in the outcome of CMV-infected KTRs. Therefore, in this study the expression level of CMV miRNAs were evaluated in active vs. latent CMV infected KTRs. METHODS Expression of viral miRNAs were studied in 61 KTRs which were divided into 30 active CMV and 31 latent CMV infected individuals. In order to study the expression level of selected miRNAs, SYBR Green Real-time PCR technique was exploited. Also, mature miRNAs expression level that were produced from one precursor, studied both in active and latent situations. RESULTS Among studied miRNAs' expression level, CMV miR-UL112-3p/5p, -UL22A-3p/5p, -US25-1-5p, -US25-2-3p/5p, -UL36-3p/5p and -UL70-3p showed significant increase in active CMV infected KTRs in comparison to latent ones. The ROC curve analysis results for miR-UL112-3p, -UL22A-3p, -US25-2-3p, -UL36-3p and -UL70-3p showed significant difference between two studied patient groups. CONCLUSION This study revealed an extremely high expression level in CMV miR-UL112-3p/5p, -UL22A-3p/5p, -US25-1-5p, -US25-2-3p/5p, -UL36-3p/5p and -UL70-3p in active CMV infected KTRs in comparison to latent ones. Further studies might help in finding the capability of miRNAs to differentiate active from latent stage of CMV infection in KTRs.
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Affiliation(s)
- Afsoon Afshari
- Shiraz Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ramin Yaghobi
- Shiraz Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Mehdi Golshan
- Shiraz Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Takahashi T, Ichikawa H, Okayama Y, Seki M, Hijikata T. SV40 miR-S1 and Cellular miR-1266 Sequester Each Other from Their Targets, Enhancing Telomerase Activity and Viral Replication. Noncoding RNA 2022; 8:ncrna8040057. [PMID: 36005825 PMCID: PMC9413689 DOI: 10.3390/ncrna8040057] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/24/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022] Open
Abstract
Virus-encoded microRNAs (miRNAs) target viral and host mRNAs to repress protein production from viral and host genes, and regulate viral persistence, cell transformation, and evasion of the immune system. The present study demonstrated that simian virus 40 (SV40)-encoded miRNA miR-S1 targets a cellular miRNA miR-1266 to derepress their respective target proteins, namely, T antigens (Tags) and telomerase reverse transcriptase (TERT). An in silico search for cellular miRNAs to interact with viral miR-S1 yielded nine potential miRNAs, five of which, including miR-1266, were found to interact with miR-S1 in dual-luciferase tests employing reporter plasmids containing the miRNA sequences with miR-S1. Intracellular bindings of miR-1266 to miR-S1 were also verified by the pull-down assay. These miRNAs were recruited into the Ago2-associated RNA-induced silencing complex. Intracellular coexpression of miR-S1 with miR-1266 abrogated the downregulation of TERT and decrease in telomerase activity induced by miR-1266. These effects of miR-S1 were also observed in miR-1266-expressing A549 cells infected with SV40. Moreover, the infected cells contained more Tag, replicated more viral DNA, and released more viral particles than control A549 cells infected with SV40, indicating that miR-S1-induced Tag downregulation was antagonized by miR-1266. Collectively, the present results revealed an interplay of viral and cellular miRNAs to sequester each other from their respective targets. This is a novel mechanism for viruses to manipulate the expression of viral and cellular proteins, contributing to not only viral lytic and latent replication but also cell transformation observed in viral infectious diseases including oncogenesis.
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Yu Z, Wang J, Nan F, Shi W, Zhang X, Jiang S, Wang B. Human Cytomegalovirus Induced Aberrant Expression of Non-coding RNAs. Front Microbiol 2022; 13:918213. [PMID: 35770158 PMCID: PMC9234646 DOI: 10.3389/fmicb.2022.918213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 05/26/2022] [Indexed: 11/13/2022] Open
Abstract
Human cytomegalovirus (HCMV) is a β-herpesvirus whose genome consists of double stranded linear DNA. HCMV genome can generate non-coding RNAs (ncRNAs) through transcription in its host cells. Besides that, HCMV infection also changes the ncRNAs expression profile of the host cells. ncRNAs play a key role in maintaining the normal physiological activity of cells, and the disorder of ncRNAs expression has numerous adverse effects on cells. However, until now, the relationship between ncRNAs and HCMV-induced adverse effects are not summarized in detail. This review aims to give a systematic summary of the role of HCMV infection in ncRNAs expression while providing insights into the molecular mechanism of unnormal cellular events caused by ncRNAs disorder. ncRNAs disorder induced by HCMV infection is highly associated with cell proliferation, apoptosis, tumorigenesis, and immune regulation, as well as the development of cardiovascular diseases, and the potential role of biomarker. We summarize the studies on HCMV associated ncRNAs disorder and suggest innovative strategies for eliminating the adverse effects caused by HCMV infection.
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Affiliation(s)
- Zhongjie Yu
- Department of Special Medicine, School of Basic Medicine, Qingdao Medical College, Qingdao University, Qingdao, China
| | - Jing Wang
- Oral Research Center, Qingdao Municipal Hospital, Qingdao, China
| | - Fulong Nan
- Department of Special Medicine, School of Basic Medicine, Qingdao Medical College, Qingdao University, Qingdao, China
| | - Wenyi Shi
- Oral Research Center, Qingdao Municipal Hospital, Qingdao, China
| | - Xianjuan Zhang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao Medical College, Qingdao University, Qingdao, China
| | - Shasha Jiang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao Medical College, Qingdao University, Qingdao, China
| | - Bin Wang
- Department of Special Medicine, School of Basic Medicine, Qingdao Medical College, Qingdao University, Qingdao, China
- *Correspondence: Bin Wang,
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15
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MicroRNA Regulation of Human Herpesvirus Latency. Viruses 2022; 14:v14061215. [PMID: 35746686 PMCID: PMC9231095 DOI: 10.3390/v14061215] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 12/04/2022] Open
Abstract
Herpesviruses are ubiquitous human pathogens. After productive (lytic) infection, all human herpesviruses are able to establish life-long latent infection and reactivate from it. Latent infection entails suppression of viral replication, maintenance of the viral genome in infected cells, and the ability to reactivate. Most human herpesviruses encode microRNAs (miRNAs) that regulate these processes during latency. Meanwhile, cellular miRNAs are hijacked by herpesviruses to participate in these processes. The viral or cellular miRNAs either directly target viral transcripts or indirectly affect viral infection through host pathways. These findings shed light on the molecular determinants that control the lytic-latent switch and may lead to novel therapeutics targeting latent infection. We discuss the multiple mechanisms by which miRNAs regulate herpesvirus latency, focusing on the patterns in these mechanisms.
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Chen Q, Luo Y, Fu Y, Feng Z, Lu L, Jiang Y, Xu D. microRNA (miR-KT-635) encoded by Cyprinid herpesvirus 2 regulates the viral replication with targeting to the ORF23. JOURNAL OF FISH DISEASES 2022; 45:631-639. [PMID: 35181893 DOI: 10.1111/jfd.13589] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 06/14/2023]
Abstract
Herpesviruses have been reported to be able to encode and express functional viral microRNAs that target both viral and cellular transcripts. In our previous studies, we found a new miRNA miR-KT-635 encoded by Cyprinid herpesvirus 2, which is predicted to target viral genes and cellular genes involved in innate immune signalling pathway and apoptosis. However, the function and target gene of miR-KT-635 are not proved. In this study, the regulating target gene of miR-KT-635 was proved as the viral gene ORF23 directly, the target point sequence on gene was verified and miR-KT-635 was identified to regulate the expression of ORF23 protein. According to the bioinformatics analysis, the tRNA domain and ribosome domain in the protein sequence of ORF23 were found to share high homology with R2i and P53R2i, which are related to the ribonucleotide reductase small subunit in the host (transform NTP to dNTP). Within expectations, silencing of viral ORF23 or transfecting miR-KT-635 mimics in Carassius auratus gibelio caudal fin cell line (GiCF) could suppress viral propagation significantly.
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Affiliation(s)
- Qikang Chen
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
| | - Yang Luo
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
| | - Yan Fu
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
| | - Zizhao Feng
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
| | - Liqun Lu
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
- National Experimental Teaching Demonstration Center for Fishery Sciences, Shanghai Ocean University, Shanghai, China
| | - Yousheng Jiang
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
- National Experimental Teaching Demonstration Center for Fishery Sciences, Shanghai Ocean University, Shanghai, China
| | - Dan Xu
- College of Fisheries and life science, Shanghai Ocean University, Shanghai, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Ministry for Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China
- National Experimental Teaching Demonstration Center for Fishery Sciences, Shanghai Ocean University, Shanghai, China
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Toyoda K, Matsuoka M. Functional and Pathogenic Roles of Retroviral Antisense Transcripts. Front Immunol 2022; 13:875211. [PMID: 35572593 PMCID: PMC9100821 DOI: 10.3389/fimmu.2022.875211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022] Open
Abstract
Exogenous retroviruses such as human immunodeficiency virus type 1 (HIV-1), human T-cell leukemia virus type 1 (HTLV-1) and bovine leukemia virus (BLV) can cause various diseases including immunodeficiency, inflammatory diseases and hematologic malignancies. These retroviruses persistently infect their hosts. Therefore, they need to evade host immune surveillance. One way in which these viruses might avoid immune detection is to utilize functional RNAs, rather than proteins, for certain activities, because RNAs are not recognized by the host immune system. HTLV-1 encodes the HTLV-1 bZIP factor (HBZ) gene in the antisense strand of the provirus. The HBZ protein is constantly expressed in HTLV-1 carriers and patients with adult T-cell leukemia-lymphoma, and it plays critical roles in pathogenesis. However, HBZ not only encodes this protein, but also functions as mRNA. Thus, HBZ gene mRNA is bifunctional. HIV-1 and BLV also encode long non-coding RNAs as antisense transcripts. In this review, we reshape our current understanding of how these antisense transcripts function and how they influence disease pathogenesis.
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Abstract
While many viral infections are limited and eventually resolved by the host immune response or by death of the host, other viruses establish long-term relationships with the host by way of a persistent infection, that range from chronic viruses that may be eventually cleared to those that establish life-long persistent or latent infection. Viruses infecting hosts from bacteria to humans establish quiescent infections that must be reactivated to produce progeny. For mammalian viruses, most notably herpesviruses, this quiescent maintenance of viral genomes in the absence of virus replication is referred to as latency. The latent strategy allows the virus to persist quiescently within a single host until conditions indicate a need to reactivate to reach a new host or, to re-seed a reservoir within the host. Here, I review common themes in viral strategies to regulate the latent cycle and reactivate from it ranging from bacteriophage to herpesviruses with a focus on human cytomegalovirus (HCMV). Themes central to herpesvirus latency include, epigenetic repression of viral gene expression and mechanisms to regulate host signaling and survival. Critical to the success of a latent program are mechanisms by which the virus can "sense" fluctuations in host biology (within the host) or environment (outside the host) and make appropriate "decisions" to maintain latency or re-initiate the replicative program. The signals or environments that indicate the establishment of a latent state, the very nature of the latent state, as well as the signals driving reactivation have been topics of intense study from bacteriophage to human viruses, as these questions encompass the height of complexity in virus-host interactions-where the host and the virus coexist.
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Affiliation(s)
- Felicia Goodrum
- Department of Immunobiology, BIO5 Institute, University of Arizona, Tucson, AZ, United States.
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19
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Correlation between miRNA-124, miRNA-544a, and TNF-α levels in acute spinal cord injury. Spinal Cord 2022; 60:779-783. [PMID: 35292776 PMCID: PMC9436774 DOI: 10.1038/s41393-022-00763-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 01/22/2023]
Abstract
STUDY DESIGN Retrospective. OBJECTIVES Acute spinal cord injury (ASCI) is caused by direct or indirect strikes from external forces on the spinal cord. Here, we investigated the correlation between the miR-124, miR-544a, and TNF-α levels in patients with ASCI, aiming to evaluate the potential usage of miR-124 and miR-544a in ASCI diagnosis. SETTING University/hospital. METHODS A total of 90 (58 male/32 female) ASIA patients and 15 (9 male/6 female) control patients (with acute limb trauma) were involved in the presented study. The ASIA patients were further subclustered based on the International Standards for the Neurological Classification of SCI (ISNCSCI) exam. 30 (18 male/12 female)cases were determined to have complete spinal cord injury (CSCI) and classified as ASIA grade A (Complete); 30 (20 male/10 female) cases were determined to have incomplete spinal cord injury (ISCI) and classified as ASIA grade B (sensory incomplete), C (motor incomplete), or D (motor incomplete); 30 (20 male/10 female) cases were determined to have normal neurological function (NNF) and classified as ASIA grade E (Normal). Plasma miR-124, miRNA-544a, and tumor necrosis factor-alpha (TNF-α) levels were measured from the blood samples collected 24 h, 48 h, and 72 h after trauma. RESULTS The levels of miR-124 and miR-544a in the CSCI and ISCI groups were significantly higher than those of the NNF and the control group 24 h after injury (P < 0.05). The increased levels gradually declined from 24 h to 72 h after injury. The area under the receiver operating characteristic curve (ROC) of miR-124, miR-544a and TNF-α 24 h after trauma in patients with acute spinal cord injury were 0.948 [95% CI (0.890, 1.000)], 0.815 [95% CI (0.638, 0.994)] and 0.770 [95% CI (0.641, 0.879)], respectively. CONCLUSION The miRNA-124 and miRNA-544a levels increased significantly in ASCI patients compared with control patients 24 h after injury. These increased levels gradually reduced from 24 h to 72 h after injury. There is a strong positive correlation between miRNA-124, miRNA-544a, and acute spinal cord injury. SPONSORSHIP The present study was supported by a University-level project of Ningxia Medical University (Project Number: XY2017147).
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Epstein-Barr virus miR-BHRF1-3 targets the BZLF1 3'UTR and regulates the lytic cycle. J Virol 2021; 96:e0149521. [PMID: 34878852 DOI: 10.1128/jvi.01495-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Suppression of lytic viral gene expression is a key aspect of the Epstein-Barr virus (EBV) life cycle to facilitate the establishment of latent infection. Molecular mechanisms regulating transitions between EBV lytic replication and latency are not fully understood. Here, we investigated the impact of viral microRNAs on the EBV lytic cycle. Through functional assays, we found that miR-BHRF1-3 attenuates EBV lytic gene expression following reactivation. To understand the miRNA targets contributing to this activity, we performed Ago PAR-CLIP analysis on EBV-positive, reactivated Burkitt's lymphoma cells and identified multiple miR-BHRF1-3 interactions with viral transcripts. Using luciferase reporter assays, we confirmed a miRNA interaction site within the 3'UTR of BZLF1 which encodes the essential immediate early (IE) transactivator Zta. Comparison of >850 published EBV genomes identified sequence polymorphisms within the miR-BHRF1-3 locus that deleteriously affect miRNA expression and function. Molecular interactions between the homologous viral miRNA, miR-rL1-17, and IE transcripts encoded by rhesus lymphocryptovirus were further identified. Our data demonstrate that regulation of IE gene expression by a BHRF1 miRNA is conserved amongst lymphocryptoviruses, and further reveal virally-encoded genetic elements that orchestrate viral antigen expression during the lytic cycle. Importance Epstein-Barr virus infection is predominantly latent in healthy individuals, while periodic cycles of reactivation are thought to facilitate persistent lifelong infection. Lytic infection has been linked to development of certain EBV-associated diseases. Here, we demonstrate that EBV miR-BHRF1-3 can suppress lytic replication by directly inhibiting Zta expression. Moreover, we identify nucleotide variants that impact the function of miR-BHRF1-3, which may contribute to specific EBV pathologies.
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21
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Valverde A, Seal A, Nares S, Shukla D, Naqvi AR. Human herpesvirus-encoded MicroRNA in host-pathogen interaction. Adv Biol Regul 2021; 82:100829. [PMID: 34560402 DOI: 10.1016/j.jbior.2021.100829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/28/2021] [Accepted: 09/13/2021] [Indexed: 11/17/2022]
Abstract
Human herpesviruses (HHV) are ubiquitous, linear dsDNA viruses that establish lifelong latency, disrupted by sporadic reactivation. HHV have evolved diverse ingenious mechanisms to evade robust host defenses. Incorporation of unique stem loop sequences that generate viral microRNAs (v-miRs) exemplifies one such evolutionary adaptation in HHV. These noncoding RNAs can control cellular and viral transcriptomes highlighting their ability in shaping host-HHV interactions. We summarize recent developments in functional characterization of HHV-encoded miRNAs in shaping the outcome of host-pathogen interaction. Non-immunogenic dissemination of v-miRs through exosomes confer added advantage to HHV in incessant modulation of host microenvironment. This review delineates the mechanistic role of v-miRs in facilitating viral persistence and tropism by targeting genes associated with cellular (apoptosis, angiogenesis, cell migration, etc.) and viral life cycle (latency, lytic and reactivation). Burgeoning evidences indicate plausible association of v-miRs in various immune-mediated diseases (nasopharyngeal carcinoma, neurological disorders, periodontal diseases, etc.) and herpesvirus-related malignancies indicating their broad-spectrum impact on host cellular pathways. We propose to exploit tisssue and systemic levels of v-miRs as diagnostic and prognostic markers for cancers and immune-mediated diseases. Therapeutic targeting of v-miRs will advance the promising outcomes of preclinical discoveries to bedside application.
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Affiliation(s)
- Araceli Valverde
- Department of Periodontics, College of Dentistry, University of Illinois at Chicago, United States
| | - Alexandra Seal
- Department of Periodontics, College of Dentistry, University of Illinois at Chicago, United States
| | - Salvador Nares
- Department of Periodontics, College of Dentistry, University of Illinois at Chicago, United States
| | - Deepak Shukla
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, United States; Department of Ophthalmology and Visual Sciences, University of Illinois Medical Center, Chicago, IL, United States
| | - Afsar Raza Naqvi
- Department of Periodontics, College of Dentistry, University of Illinois at Chicago, United States.
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22
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Afshari A, Yaghobi R, Rezaei G. Inter-regulatory role of microRNAs in interaction between viruses and stem cells. World J Stem Cells 2021; 13:985-1004. [PMID: 34567421 PMCID: PMC8422934 DOI: 10.4252/wjsc.v13.i8.985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/11/2021] [Accepted: 07/13/2021] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs (miRNAs) are well known for post-transcriptional regulatory ability over specific mRNA targets. miRNAs exhibit temporal or tissue-specific expression patterns and regulate the cell and tissue developmental pathways. They also have determinative roles in production and differentiation of multiple lineages of stem cells and might have therapeutic advantages. miRNAs are a part of some viruses’ regulatory machinery, not a byproduct. The trace of miRNAs was detected in the genomes of viruses and regulation of cell reprograming and viral pathogenesis. Combination of inter-regulatory systems has been detected for miRNAs during viral infections in stem cells. Contraction between viruses and stem cells may be helpful in therapeutic tactics, pathogenesis, controlling viral infections and defining stem cell developmental strategies that is programmed by miRNAs as a tool. Therefore, in this review we intended to study the inter-regulatory role of miRNAs in the interaction between viruses and stem cells and tried to explain the advantages of miRNA regulatory potentials, which make a new landscape for future studies.
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Affiliation(s)
- Afsoon Afshari
- Shiraz Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz 7193711351, Iran
| | - Ramin Yaghobi
- Shiraz Transplant Research Center, Shiraz University of Medical Sciences, Shiraz 7193711351, Iran
| | - Ghazal Rezaei
- Shiraz Transplant Research Center, Shiraz University of Medical Sciences, Shiraz 7193711351, Iran
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Lee BJ, Min CK, Hancock M, Streblow DN, Caposio P, Goodrum FD, Yurochko AD. Human Cytomegalovirus Host Interactions: EGFR and Host Cell Signaling Is a Point of Convergence Between Viral Infection and Functional Changes in Infected Cells. Front Microbiol 2021; 12:660901. [PMID: 34025614 PMCID: PMC8138183 DOI: 10.3389/fmicb.2021.660901] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 04/07/2021] [Indexed: 12/22/2022] Open
Abstract
Viruses have evolved diverse strategies to manipulate cellular signaling pathways in order to promote infection and/or persistence. Human cytomegalovirus (HCMV) possesses a number of unique properties that allow the virus to alter cellular events required for infection of a diverse array of host cell types and long-term persistence. Of specific importance is infection of bone marrow derived and myeloid lineage cells, such as peripheral blood monocytes and CD34+ hematopoietic progenitor cells (HPCs) because of their essential role in dissemination of the virus and for the establishment of latency. Viral induced signaling through the Epidermal Growth Factor Receptor (EGFR) and other receptors such as integrins are key control points for viral-induced cellular changes and productive and latent infection in host organ systems. This review will explore the current understanding of HCMV strategies utilized to hijack cellular signaling pathways, such as EGFR, to promote the wide-spread dissemination and the classic life-long herpesvirus persistence.
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Affiliation(s)
- Byeong-Jae Lee
- Department of Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Center for Applied Immunology and Pathological Processes, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Center of Excellence for Emerging Viral Threats, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States
| | - Chan-Ki Min
- Department of Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Center for Applied Immunology and Pathological Processes, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Center of Excellence for Emerging Viral Threats, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States
| | - Meaghan Hancock
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, United States
| | - Daniel N Streblow
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, United States
| | - Patrizia Caposio
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, United States
| | | | - Andrew D Yurochko
- Department of Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Feist-Weiller Cancer Center, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Center for Cardiovascular Diseases and Sciences, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States.,Center of Excellence in Arthritis and Rheumatology, Louisiana State University Health Sciences Center Shreveport, Shreveport, LA, United States
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Screening and validation of differentially expressed microRNAs and target genes in hypertensive mice induced by cytomegalovirus infection. Biosci Rep 2021; 40:227064. [PMID: 33245094 PMCID: PMC7729292 DOI: 10.1042/bsr20202387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 11/19/2020] [Accepted: 11/24/2020] [Indexed: 02/07/2023] Open
Abstract
Introduction: Multiple studies have suggested an association between cytomegalovirus (CMV) infection and essential hypertension (EH). MicroRNAs (miRNAs) play a critical role in the development of EH by regulating the expression of specific target genes. However, little is known about the role of miRNAs in CMV-induced EH. In the present study, we compared the miRNA expression profiles of samples from normal and murine cytomegalovirus (MCMV)-infected C57BL/6 mice using high-throughput sequencing analysis. Methods: We collected the thoracic aorta, heart tissues, and peripheral blood from 20 normal mice and 20 MCMV-infected mice. We identified differentially expressed miRNAs in the peripheral blood samples and predicted their target genes using bioinformatics tools. We then experimentally validated them using quantitative reverse transcription polymerase chain reaction (qRT-PCR) and the target genes with double luciferase reporter gene assay. Results: We found 118 differentially expressed miRNAs, among which 9 miRNAs were identified as potential MCMV infection-induced hypertension regulators. We then validated the expression of two candidate miRNAs, mmu-miR-1929-3p and mcmv-miR-m01-4-5p, using qRT-PCR. Furthermore, the dual-luciferase reporter gene assay revealed that the 3′-untranslated region (UTR) of endothelin A receptor (Ednra) messenger RNA (mRNA) contained a binding site for mmu-miR-1929-3p. Collectively, our data suggest that MCMV infection can raise the blood pressure and reduce mmu-miR-1929-3p expression in C57BL/6 mice. Moreover, we found that mmu-miR-1929-3p targets the 3′-UTR of the Ednra mRNA. Conclusion: This novel regulatory axis could aid the development of new approaches for the clinical prevention and control of EH.
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Gao Z, Zhou L, Bai J, Ding M, Liu D, Zheng S, Li Y, Li X, Wang X, Jin M, Shangting H, Qiu C, Wang C, Zhang X, Zhang C, Chen X. Assessment of HCMV-encoded microRNAs in plasma as potential biomarkers in pregnant women with adverse pregnancy outcomes. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:638. [PMID: 33987336 PMCID: PMC8106018 DOI: 10.21037/atm-20-7354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Background Human cytomegalovirus (HCMV) is the most frequent cause of congenital infections and can lead to adverse pregnancy outcomes (APOs). HCMV encodes multiple microRNAs (miRNAs) that have been reported to be partially related to host immune responses, cell cycle regulation, viral replication, and viral latency, and can be detected in human plasma. However, the relevance for HCMV-encoded miRNAs in maternal plasma as an indicator for APOs has never been evaluated. Methods Expression profiles of 22 HCMV-encoded miRNAs were first measured in plasma samples from 20 pregnant women with APOs and 28 normal controls using quantitative reverse-transcription polymerase chain reaction. Next, markedly changed miRNAs were validated in another independent validation set consisting of 20 pregnant women with APOs and 27 control subjects. Markedly changed miRNAs were further assessed in the placenta tissues. HCMV DNA in peripheral blood leukocytes (PBLs) and anti-HCMV immunoglobulin M (IgM) and anti-HCMV immunoglobulin G (IgG) in plasma were also examined in both training and validation sets. Diagnostic value and risk factors were compared between APO cohorts and normal controls. Results Analysis of the training and validation data sets revealed that plasma concentrations of hcmv-miR-UL148D, hcmv-miR-US25-1-5p and hcmv-miR-US5-1 were significantly increased in pregnant women with APOs compared with normal controls. Hcmv-miR-US25-1-5p presented the largest area under the receiver-operating characteristic (ROC) curve (AUC) (0.735; 95% CI, 0.635–0.836), with a sensitivity of 68% and specificity of 71%. Furthermore, plasma levels of hcmv-miR-US25-1-5p and hcmv-miR-US5-1 correlated positively with APOs (P=0.029 and 0.035, respectively). Hcmv-miR-US25-1-5p in the placenta tissues were dramatically increased in APOs, and correlated with plasma hcmv-miR-US25-1-5p. Nevertheless, neither the concentration of HCMV DNA in PBLs nor the positivity rates of anti-HCMV IgM and anti-HCMV IgG in plasma showed a statistically significant correlation with APOs. Conclusions We identified a unique signature of HCMV-encoded miRNAs in pregnant women with APOs that may be useful as a potential noninvasive biomarker for predicting and monitoring APOs during HCMV infection.
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Affiliation(s)
- Zhiying Gao
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, China.,State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Likun Zhou
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Jing Bai
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Meng Ding
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Deshui Liu
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, China
| | - Shaohai Zheng
- Department of Obstetrics and Gynecology, Qiqihar Jianhua Hospital, Qiqihar, China
| | - Yuewen Li
- Department of Obstetrics and Gynecology, the Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Xiulan Li
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Xiaojuan Wang
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Ming Jin
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, China
| | - Huizi Shangting
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, China
| | - Changchun Qiu
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, China
| | - Cheng Wang
- Department of Clinical Laboratory, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, China
| | | | - Chenyu Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
| | - Xi Chen
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, China
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26
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Diggins NL, Skalsky RL, Hancock MH. Regulation of Latency and Reactivation by Human Cytomegalovirus miRNAs. Pathogens 2021; 10:pathogens10020200. [PMID: 33668486 PMCID: PMC7918750 DOI: 10.3390/pathogens10020200] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 12/17/2022] Open
Abstract
Human cytomegalovirus (HCMV) encodes 22 mature microRNAs (miRNAs), which regulate a myriad of cellular processes, including vesicular trafficking, cell cycle progression, apoptosis, and immune evasion, as well as viral gene expression. Recent evidence points to a critical role for HCMV miRNAs in mediating latency in CD34+ hematopoietic progenitor cells through modulation of cellular signaling pathways, including attenuation of TGFβ and EGFR signaling. Moreover, HCMV miRNAs can act in concert with, or in opposition to, viral proteins in regulating host cell functions. Here, we comprehensively review the studies of HCMV miRNAs in the context of latency and highlight the novel processes that are manipulated by the virus using these small non-coding RNAs.
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27
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Zhou W, Wang C, Ding M, Bian Y, Zhong Y, Shen H, Wang J, Zhang CY, Zhang C. Different expression pattern of human cytomegalovirus-encoded microRNAs in circulation from virus latency to reactivation. J Transl Med 2020; 18:469. [PMID: 33298092 PMCID: PMC7727131 DOI: 10.1186/s12967-020-02653-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/30/2020] [Indexed: 12/13/2022] Open
Abstract
Background Human cytomegalovirus (HCMV) is a beta-hersvirinae that has a high latent infection rate worldwide and can cause serious consequences in immunocompromised patients when reactivation; however, the mechanism of how HCMV convert from latent to reactivation has rarely been investigated. In the present study, we aimed to perform a comprehensive analysis of the HCMV-encoded microRNA (miRNA) profile in serum of patients upon HCMV reactivation from latency and to further evaluate its clinical significance for the disease monitoring and preventing usefulness. Methods Serum samples from 59 viremia patients and 60 age-gender matched controls were enrolled in this study for screening and validation of different expression of HCMV miRNAs. Serum concentrations of 22 known HCMV miRNAs were determined by a hydrolysis probe-based stem-loop quantitative reverse transcription polymerase chain reaction (RT-qPCR) assay. HCMV DNA was measured by quantitative real-time PCR (qPCR) with the whole blood sample. Serum HCMV IgG and IgM were assessed using enzyme linked immunosorbent assay (ELISA). Another 47 samples from 5 patients at different time points were collected to evaluate the monitoring effectiveness and disease prediction ability of differential expression HCMV-miRNAs during the antiviral treatment. Results The RT-qPCR analysis revealed that the serum levels of 16 of the 22 examined HCMV miRNAs were elevated in HCMV viremia patients compared with controls, and a profile of 8 HCMV miRNAs including hcmv-miR-US25-2-3p, hcmv-miR-US4-5p, hcmv-miR-US25-2-5p, hcmv-miR-US25-1-3p, hcmv-miR-US25-1, hcmv-miR-UL36, hcmv-miR-UL148D, hcmv-miR-US29-3p were markedly elevated (fold change > 2, P < 0.01). Receiver operating characteristic curve (ROC) analysis were performed on the selected HCMV-miRNAs in all of the patients and controls that enrolled in this study, and which ranged from 0.72 to 0.80 in the autoimmune patients. In addition, hcmv-miR-US25-1-3p levels were significantly correlated with HCMV DNA load (r = 0.349, P = 0.007), and were obviously higher in the reactivation set than the latency set in the autoimmune patients, which could be a predictor for the monitoring of the antiviral treatment. Conclusions HCMV miRNAs profile showed markedly shift-switch from latency to reactivation in circulation from HCMV infected patients and hcmv-miR-US25-1-3p may be served as a predictor for the switch upon reactivation from latency in patients suffered with autoimmune diseases.
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Affiliation(s)
- Wanqing Zhou
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing University, Nanjing, 210008, China.,Department of Clinical Laboratory, Jinling Hospital, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University School of Medicine, Nanjing University, Nanjing, 210002, China.,Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Advance Research Institute of Life Sciences, School of Life Sciences, Nanjing University, Nanjing, 210046, China
| | - Cheng Wang
- Department of Clinical Laboratory, Jinling Hospital, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University School of Medicine, Nanjing University, Nanjing, 210002, China.,Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Advance Research Institute of Life Sciences, School of Life Sciences, Nanjing University, Nanjing, 210046, China
| | - Meng Ding
- Department of Urology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Yuying Bian
- Department of Clinical Laboratory, Jinling Hospital, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University School of Medicine, Nanjing University, Nanjing, 210002, China.,Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Advance Research Institute of Life Sciences, School of Life Sciences, Nanjing University, Nanjing, 210046, China
| | - Yujie Zhong
- Department of Clinical Laboratory, Jinling Hospital, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University School of Medicine, Nanjing University, Nanjing, 210002, China.,Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Advance Research Institute of Life Sciences, School of Life Sciences, Nanjing University, Nanjing, 210046, China
| | - Han Shen
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing University, Nanjing, 210008, China
| | - Junjun Wang
- Department of Clinical Laboratory, Jinling Hospital, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University School of Medicine, Nanjing University, Nanjing, 210002, China
| | - Chen-Yu Zhang
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Advance Research Institute of Life Sciences, School of Life Sciences, Nanjing University, Nanjing, 210046, China.
| | - Chunni Zhang
- Department of Clinical Laboratory, Jinling Hospital, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University School of Medicine, Nanjing University, Nanjing, 210002, China. .,Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Advance Research Institute of Life Sciences, School of Life Sciences, Nanjing University, Nanjing, 210046, China.
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28
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Mason R, Groves IJ, Wills MR, Sinclair JH, Reeves MB. Human cytomegalovirus major immediate early transcripts arise predominantly from the canonical major immediate early promoter in reactivating progenitor-derived dendritic cells. J Gen Virol 2020; 101:635-644. [PMID: 32375946 PMCID: PMC7414444 DOI: 10.1099/jgv.0.001419] [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] [Indexed: 12/16/2022] Open
Abstract
Human cytomegalovirus latency and reactivation is a major source of morbidity in immune-suppressed patient populations. Lifelong latent infections are established in CD34+progenitor cells in the bone marrow, which are hallmarked by a lack of major lytic gene expression, genome replication and virus production. A number of studies have shown that inhibition of the major immediate early promoter (MIEP) – the promoter that regulates immediate early (IE) gene expression – is important for the establishment of latency and that, by extension, reactivation requires reversal of this repression of the MIEP. The identification of novel promoters (termed ip1 and ip2) downstream of the MIEP that can drive IE gene expression has led to speculation over the precise role of the MIEP in reactivation. In this study we show that IE transcripts arise from both the MIEP and ip2 promoter in the THP1 cell macrophage cell line and also CD14+monocytes stimulated with phorbol ester. In contrast, we show that in in vitro generated dendritic cells or macrophages that support HCMV reactivation IE transcripts arise predominantly from the MIEP and not the intronic promoters. Furthermore, inhibition of histone modifying enzyme activity confirms the view that the MIEP is predominantly regulated by the activity of cellular chromatin. Finally, we observe that ip2-derived IE transcription is cycloheximide-sensitive in reactivating DCs, behaviour consistent with an early gene designation. Taken together, these data argue that MIEP activity is still important for HCMV reactivation but ip2 activity could play cell-type-specific roles in reactivation.
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Affiliation(s)
- Rebecca Mason
- Institute of Immunity & Transplantation, University College London, Royal Free Campus, London NW3 2PF, UK
| | - Ian J Groves
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Mark R Wills
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - John H Sinclair
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Matthew B Reeves
- Institute of Immunity & Transplantation, University College London, Royal Free Campus, London NW3 2PF, UK
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29
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Regulation of the MIE Locus During HCMV Latency and Reactivation. Pathogens 2020; 9:pathogens9110869. [PMID: 33113934 PMCID: PMC7690695 DOI: 10.3390/pathogens9110869] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 12/20/2022] Open
Abstract
Human cytomegalovirus (HCMV) is a ubiquitous herpesviral pathogen that results in life-long infection. HCMV maintains a latent or quiescent infection in hematopoietic cells, which is broadly defined by transcriptional silencing and the absence of de novo virion production. However, upon cell differentiation coupled with immune dysfunction, the virus can reactivate, which leads to lytic replication in a variety of cell and tissue types. One of the mechanisms controlling the balance between latency and reactivation/lytic replication is the regulation of the major immediate-early (MIE) locus. This enhancer/promoter region is complex, and it is regulated by chromatinization and associated factors, as well as a variety of transcription factors. Herein, we discuss these factors and how they influence the MIE locus, which ultimately impacts the phase of HCMV infection.
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30
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Identification of a Functional Small Noncoding RNA of African Swine Fever Virus. J Virol 2020; 94:JVI.01515-20. [PMID: 32796064 PMCID: PMC7565616 DOI: 10.1128/jvi.01515-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 01/08/2023] Open
Abstract
African swine fever (ASF) poses a major threat to pig populations and food security worldwide. The disease is endemic to Africa and Eastern Europe and is rapidly emerging into Asia, where it has led to the deaths of millions of pigs in the last 12 months. The development of safe and effective vaccines to protect pigs against ASF has been hindered by lack of understanding of the complex interactions between ASFV and the host cell. We focused our work on characterizing the interactions between ASFV and sncRNAs. Although comparatively modest changes to host sncRNA abundances were observed upon ASFV infection, we discovered and characterized a novel functional ASFV-encoded sncRNA. The results from this study add important insights into ASFV host-pathogen interactions. This knowledge may be exploited to develop more effective ASFV vaccines that take advantage of the sncRNA system. African swine fever virus (ASFV) causes a lethal hemorrhagic disease of domestic pigs, against which no vaccine is available. ASFV has a large, double-stranded DNA genome that encodes over 150 proteins. Replication takes place predominantly in the cytoplasm of the cell and involves complex interactions with host cellular components, including small noncoding RNAs (sncRNAs). A number of DNA viruses are known to manipulate sncRNA either by encoding their own or disrupting host sncRNA. To investigate the interplay between ASFV and sncRNAs, a study of host and viral small RNAs extracted from ASFV-infected primary porcine macrophages (PAMs) was undertaken. We discovered that ASFV infection had only a modest effect on host miRNAs, with only 6 miRNAs differentially expressed during infection. The data also revealed 3 potential novel small RNAs encoded by ASFV, ASFVsRNA1-3. Further investigation of ASFVsRNA2 detected it in lymphoid tissue from pigs with ASF. Overexpression of ASFVsRNA2 led to an up to 1-log reduction in ASFV growth, indicating that ASFV utilizes a virus-encoded small RNA to disrupt its own replication. IMPORTANCE African swine fever (ASF) poses a major threat to pig populations and food security worldwide. The disease is endemic to Africa and Eastern Europe and is rapidly emerging into Asia, where it has led to the deaths of millions of pigs in the last 12 months. The development of safe and effective vaccines to protect pigs against ASF has been hindered by lack of understanding of the complex interactions between ASFV and the host cell. We focused our work on characterizing the interactions between ASFV and sncRNAs. Although comparatively modest changes to host sncRNA abundances were observed upon ASFV infection, we discovered and characterized a novel functional ASFV-encoded sncRNA. The results from this study add important insights into ASFV host-pathogen interactions. This knowledge may be exploited to develop more effective ASFV vaccines that take advantage of the sncRNA system.
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31
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Gallo A, Bulati M, Miceli V, Amodio N, Conaldi PG. Non-Coding RNAs: Strategy for Viruses' Offensive. Noncoding RNA 2020; 6:ncrna6030038. [PMID: 32927786 PMCID: PMC7549346 DOI: 10.3390/ncrna6030038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/01/2020] [Accepted: 09/08/2020] [Indexed: 02/07/2023] Open
Abstract
The awareness of viruses as a constant threat for human public health is a matter of fact and in this resides the need of understanding the mechanisms they use to trick the host. Viral non-coding RNAs are gaining much value and interest for the potential impact played in host gene regulation, acting as fine tuners of host cellular defense mechanisms. The implicit importance of v-ncRNAs resides first in the limited genomes size of viruses carrying only strictly necessary genomic sequences. The other crucial and appealing characteristic of v-ncRNAs is the non-immunogenicity, making them the perfect expedient to be used in the never-ending virus-host war. In this review, we wish to examine how DNA and RNA viruses have evolved a common strategy and which the crucial host pathways are targeted through v-ncRNAs in order to grant and facilitate their life cycle.
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Affiliation(s)
- Alessia Gallo
- Department of Research, IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), Via E.Tricomi 5, 90127 Palermo, Italy; (M.B.); (V.M.); (P.G.C.)
- Correspondence: ; Tel.: +39-91-21-92-649
| | - Matteo Bulati
- Department of Research, IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), Via E.Tricomi 5, 90127 Palermo, Italy; (M.B.); (V.M.); (P.G.C.)
| | - Vitale Miceli
- Department of Research, IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), Via E.Tricomi 5, 90127 Palermo, Italy; (M.B.); (V.M.); (P.G.C.)
| | - Nicola Amodio
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, 88100 Catanzaro, Italy;
| | - Pier Giulio Conaldi
- Department of Research, IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), Via E.Tricomi 5, 90127 Palermo, Italy; (M.B.); (V.M.); (P.G.C.)
- UPMC Italy (University of Pittsburgh Medical Center Italy), Discesa dei Giudici 4, 90133 Palermo, Italy
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Impact of Natural Occurring ERAP1 Single Nucleotide Polymorphisms within miRNA-Binding Sites on HCMV Infection. Int J Mol Sci 2020; 21:ijms21165861. [PMID: 32824160 PMCID: PMC7461596 DOI: 10.3390/ijms21165861] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/10/2020] [Accepted: 08/12/2020] [Indexed: 02/07/2023] Open
Abstract
Human cytomegalovirus (HCMV) is a β-herpesvirus that causes serious problems in people with a compromised immune system, whereas it coexists asymptomatically within the host with a healthy immune system. Like other viruses, HCMV has adopted multiples strategies to manipulate the host’s immune responses. Among them, expression of viral microRNAs (miRNAs) is one of the most intriguing. HCMV miR-UL112-5p and miR-US4-1 have been found to contribute to immune evasion by targeting the endoplasmic reticulum aminopeptidase 1 (ERAP1), a highly polymorphic key component of antigen processing. The current incomplete picture on the interplay between viral miRNAs and host immunity implies the need to better characterize the host genetic determinants. Naturally occurring single nucleotide polymorphisms (SNPs) within the miRNA binding sites of target genes may affect miRNA–target interactions. In this review, we focus on the relevance of 3′ untranslated region (3′UTR) ERAP1 SNPs within miRNA binding sites in modulating miRNA–mRNA interactions and the possible consequent individual susceptibility to HCMV infection. Moreover, we performed an in silico analysis using different bioinformatic algorithms to predict ERAP1 variants with a putative powerful biological function. This evidence provides a basis to deepen the knowledge on how 3′UTR ERAP1 variants may alter the mechanism of action of HCMV miRNAs, in order to develop targeted antiviral therapies.
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33
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Forte E, Zhang Z, Thorp EB, Hummel M. Cytomegalovirus Latency and Reactivation: An Intricate Interplay With the Host Immune Response. Front Cell Infect Microbiol 2020; 10:130. [PMID: 32296651 PMCID: PMC7136410 DOI: 10.3389/fcimb.2020.00130] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 03/10/2020] [Indexed: 12/16/2022] Open
Abstract
CMV is an ancient herpesvirus that has co-evolved with its host over millions of years. The 236 kbp genome encodes at least 165 genes, four non-coding RNAs and 14 miRNAs. Of the protein-coding genes, 43-44 are core replication genes common to all herpesviruses, while ~30 are unique to betaherpesviruses. Many CMV genes are involved in evading detection by the host immune response, and others have roles in cell tropism. CMV replicates systemically, and thus, has adapted to various biological niches within the host. Different biological niches may place competing demands on the virus, such that genes that are favorable in some contexts are unfavorable in others. The outcome of infection is dependent on the cell type. In fibroblasts, the virus replicates lytically to produce infectious virus. In other cell types, such as myeloid progenitor cells, there is an initial burst of lytic gene expression, which is subsequently silenced through epigenetic repression, leading to establishment of latency. Latently infected monocytes disseminate the virus to various organs. Latency is established through cell type specific mechanisms of transcriptional silencing. In contrast, reactivation is triggered through pathways activated by inflammation, infection, and injury that are common to many cell types, as well as differentiation of myeloid cells to dendritic cells. Thus, CMV has evolved a complex relationship with the host immune response, in which it exploits cell type specific mechanisms of gene regulation to establish latency and to disseminate infection systemically, and also uses the inflammatory response to infection as an early warning system which allows the virus to escape from situations in which its survival is threatened, either by cellular damage or infection of the host with another pathogen. Spontaneous reactivation induced by cellular aging/damage may explain why extensive expression of lytic genes has been observed in recent studies using highly sensitive transcriptome analyses of cells from latently infected individuals. Recent studies with animal models highlight the potential for harnessing the host immune response to blunt cellular injury induced by organ transplantation, and thus, prevent reactivation of CMV and its sequelae.
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Affiliation(s)
- Eleonora Forte
- Department of Surgery, Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Zheng Zhang
- Department of Surgery, Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Edward B. Thorp
- Department of Pathology and Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Mary Hummel
- Department of Surgery, Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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Zhang L, Yu J, Liu Z. MicroRNAs expressed by human cytomegalovirus. Virol J 2020; 17:34. [PMID: 32164742 PMCID: PMC7069213 DOI: 10.1186/s12985-020-1296-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 02/04/2020] [Indexed: 12/13/2022] Open
Abstract
Background MicroRNAs (miRNAs) are small non-coding RNAs about 22 nucleotides in length, which play an important role in gene regulation of both eukaryotes and viruses. They can promote RNA cleavage and repress translation via base-pairing with complementary sequences within mRNA molecules. Main body Human cytomegalovirus (HCMV) encodes a large number of miRNAs that regulate transcriptions of both host cells and themselves to favor viral infection and inhibit the host’s immune response. To date, ~ 26 mature HCMV miRNAs have been identified. Nevertheless, their roles in viral infection are ambiguous, and the mechanisms have not been fully revealed. Therefore, we discuss the methods used in HCMV miRNA research and summarize the important roles of HCMV miRNAs and their potential mechanisms in infection. Conclusions To study the miRNAs encoded by viruses and their roles in viral replication, expression, and infection will not only contribute to the planning of effective antiviral therapies, but also provide new molecular targets for the development of antiviral drugs.
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Affiliation(s)
- Lichen Zhang
- Clinical School, Weifang Medical University, Weifang, 261053, China
| | - Jiaqi Yu
- Clinical School, Weifang Medical University, Weifang, 261053, China
| | - Zhijun Liu
- Department of Medical Microbiology, Weifang Medical University, Weifang, 261053, China.
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35
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Human cytomegalovirus-encoded MicroRNAs: A master regulator of latent infection. INFECTION GENETICS AND EVOLUTION 2020; 78:104119. [DOI: 10.1016/j.meegid.2019.104119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 11/06/2019] [Accepted: 11/14/2019] [Indexed: 01/08/2023]
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36
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Mishra R, Kumar A, Ingle H, Kumar H. The Interplay Between Viral-Derived miRNAs and Host Immunity During Infection. Front Immunol 2020; 10:3079. [PMID: 32038626 PMCID: PMC6989438 DOI: 10.3389/fimmu.2019.03079] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/17/2019] [Indexed: 01/01/2023] Open
Abstract
MicroRNAs are short non-coding RNAs that play a crucial role in the regulation of gene expression during cellular processes. The host-encoded miRNAs are known to modulate the antiviral defense during viral infection. In the last decade, multiple DNA and RNA viruses have been shown to produce miRNAs known as viral miRNAs (v-miRNAs) so as to evade the host immune response. In this review, we highlight the origin and biogenesis of viral miRNAs during the viral lifecycle. We also explore the role of viral miRNAs in immune evasion and hence in maintaining chronic infection and disease. Finally, we offer insights into the underexplored role of viral miRNAs as potential targets for developing therapeutics for treating complex viral diseases.
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Affiliation(s)
- Richa Mishra
- Laboratory of Immunology and Infectious Disease Biology, Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India
| | - Ashish Kumar
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Harshad Ingle
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Himanshu Kumar
- Laboratory of Immunology and Infectious Disease Biology, Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India
- Laboratory of Host Defense, WPI Immunology, Frontier Research Centre, Osaka University, Osaka, Japan
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Pang F, Wang X, Chen Z, Zhang Z, Zhang M, Wang C, Yang X, An Q, Du L, Wang F. Integrated Analysis of Differentially Expressed miRNAs and mRNAs in Goat Skin Fibroblast Cells in Response to Orf Virus Infection Reveals That cfa-let-7a Regulates Thrombospondin 1 Expression. Viruses 2020; 12:v12010118. [PMID: 31963559 PMCID: PMC7019303 DOI: 10.3390/v12010118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 12/30/2022] Open
Abstract
Orf is a zoonotic disease that has caused huge economic losses globally. Systematical analysis of dysregulated cellular micro RNAs (miRNAs) in response to Orf virus (ORFV) infection has not been reported. In the current study, miRNA sequencing and RNA sequencing (RNA-seq) were performed in goat skin fibroblast (GSF) cells at 0, 18, and 30 h post infection (h.p.i). We identified 140 and 221 differentially expressed (DE) miRNAs at 18 and 30 h.p.i, respectively. We also identified 729 and 3961 DE genes (DEGs) at 18 and 30 h.p.i, respectively. GO enrichment analysis indicates enrichment of apoptotic regulation, defense response to virus, immune response, and inflammatory response at both time points. DE miRNAs and DEGs with reverse expression were used to construct miRNA-gene networks. Seven DE miRNAs and seven DEGs related to "negative regulation of viral genome replication" were identified. These were validated by RT-qPCR. Cfa-let-7a, a significantly upregulated miRNA, was found to repress Thrombospondin 1 (THBS1) mRNA and protein expression by directly targeting the THBS1 3' untranslated region. THBS1 has been reported to induce apoptosis; therefore, the cfa-let-7a-THBS1 axis may play an important role in cellular apoptosis during ORFV infection. This study provides new insights into ORFV and host cell interaction mechanisms.
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Affiliation(s)
- Feng Pang
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Xinying Wang
- Guizhou Institute of Technology, Guiyang, 550003, China;
| | - Zhen Chen
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Zhenxing Zhang
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Mengmeng Zhang
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Chengqiang Wang
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Xiaohong Yang
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Qi An
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Li Du
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
| | - Fengyang Wang
- College of Animal Science and Technology, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Haikou 570228, China; (F.P.); (Z.C.); (Z.Z.); (M.Z.); (C.W.); (X.Y.); (Q.A.); (L.D.)
- Correspondence:
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38
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Adamson CS, Nevels MM. Bright and Early: Inhibiting Human Cytomegalovirus by Targeting Major Immediate-Early Gene Expression or Protein Function. Viruses 2020; 12:v12010110. [PMID: 31963209 PMCID: PMC7019229 DOI: 10.3390/v12010110] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/07/2020] [Accepted: 01/08/2020] [Indexed: 12/11/2022] Open
Abstract
The human cytomegalovirus (HCMV), one of eight human herpesviruses, establishes lifelong latent infections in most people worldwide. Primary or reactivated HCMV infections cause severe disease in immunosuppressed patients and congenital defects in children. There is no vaccine for HCMV, and the currently approved antivirals come with major limitations. Most approved HCMV antivirals target late molecular processes in the viral replication cycle including DNA replication and packaging. “Bright and early” events in HCMV infection have not been exploited for systemic prevention or treatment of disease. Initiation of HCMV replication depends on transcription from the viral major immediate-early (IE) gene. Alternative transcripts produced from this gene give rise to the IE1 and IE2 families of viral proteins, which localize to the host cell nucleus. The IE1 and IE2 proteins are believed to control all subsequent early and late events in HCMV replication, including reactivation from latency, in part by antagonizing intrinsic and innate immune responses. Here we provide an update on the regulation of major IE gene expression and the functions of IE1 and IE2 proteins. We will relate this insight to experimental approaches that target IE gene expression or protein function via molecular gene silencing and editing or small chemical inhibitors.
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Fani M, Zandi M, Rezayi M, Khodadad N, Langari H, Amiri I. The Role of microRNAs in the Viral Infections. Curr Pharm Des 2019; 24:4659-4667. [PMID: 30636585 DOI: 10.2174/1381612825666190110161034] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/24/2018] [Accepted: 12/31/2018] [Indexed: 12/15/2022]
Abstract
MicroRNAs (miRNAs) are non-coding RNAs with 19 to 24 nucleotides which are evolutionally conserved. MicroRNAs play a regulatory role in many cellular functions such as immune mechanisms, apoptosis, and tumorigenesis. The main function of miRNAs is the post-transcriptional regulation of gene expression via mRNA degradation or inhibition of translation. In fact, many of them act as an oncogene or tumor suppressor. These molecular structures participate in many physiological and pathological processes of the cell. The virus can also produce them for developing its pathogenic processes. It was initially thought that viruses without nuclear replication cycle such as Poxviridae and RNA viruses can not code miRNA, but recently, it has been proven that RNA viruses can also produce miRNA. The aim of this articles is to describe viral miRNAs biogenesis and their effects on cellular and viral genes.
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Affiliation(s)
- Mona Fani
- Virology Department, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Milad Zandi
- Department of Virology, School of Public Health, Tehran University of Medical Science, Tehran, Iran
| | - Majid Rezayi
- Metabolic Syndrome Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nastaran Khodadad
- Virology Department, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hadis Langari
- Metabolic Syndrome Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Iraj Amiri
- Computational Optics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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40
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Mikell I, Crawford LB, Hancock MH, Mitchell J, Buehler J, Goodrum F, Nelson JA. HCMV miR-US22 down-regulation of EGR-1 regulates CD34+ hematopoietic progenitor cell proliferation and viral reactivation. PLoS Pathog 2019; 15:e1007854. [PMID: 31725809 PMCID: PMC6855405 DOI: 10.1371/journal.ppat.1007854] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 09/11/2019] [Indexed: 11/25/2022] Open
Abstract
Reactivation of latent Human Cytomegalovirus (HCMV) in CD34+ hematopoietic progenitor cells (HPCs) is closely linked to hematopoiesis. Viral latency requires maintenance of the progenitor cell quiescence, while reactivation initiates following mobilization of HPCs to the periphery and differentiation into CD14+ macrophages. Early growth response gene 1 (EGR-1) is a transcription factor activated by Epidermal growth factor receptor (EGFR) signaling that is essential for the maintenance of CD34+ HPC self-renewal in the bone marrow niche. Down-regulation of EGR-1 results in mobilization and differentiation of CD34+ HPC from the bone marrow to the periphery. In the current study we demonstrate that the transcription factor EGR-1 is directly targeted for down-regulation by HCMV miR-US22 that results in decreased proliferation of CD34+ HPCs and a decrease in total hematopoietic colony formation. We also show that an HCMV miR-US22 mutant fails to reactivate in CD34+ HPCs, indicating that expression of EGR-1 inhibits viral reactivation. Since EGR-1 promotes CD34+ HPC self-renewal in the bone marrow niche, HCMV miR-US22 down-regulation of EGR-1 is a necessary step to block HPC self-renewal and proliferation to induce a cellular differentiation pathway necessary to promote reactivation of virus.
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Affiliation(s)
- Iliyana Mikell
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Lindsey B. Crawford
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Meaghan H. Hancock
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Jennifer Mitchell
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Jason Buehler
- Department of Immunobiology, BIO5 Institute, University of Arizona, Tucson, Arizona, United States of America
| | - Felicia Goodrum
- Department of Immunobiology, BIO5 Institute, University of Arizona, Tucson, Arizona, United States of America
| | - Jay A. Nelson
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
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41
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Crawford LB, Caposio P, Kreklywich C, Pham AH, Hancock MH, Jones TA, Smith PP, Yurochko AD, Nelson JA, Streblow DN. Human Cytomegalovirus US28 Ligand Binding Activity Is Required for Latency in CD34 + Hematopoietic Progenitor Cells and Humanized NSG Mice. mBio 2019; 10:e01889-19. [PMID: 31431555 PMCID: PMC6703429 DOI: 10.1128/mbio.01889-19] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 07/22/2019] [Indexed: 01/13/2023] Open
Abstract
Human cytomegalovirus (HCMV) infection of CD34+ hematopoietic progenitor cells (CD34+ HPCs) provides a critical reservoir of virus in stem cell transplant patients, and viral reactivation remains a significant cause of morbidity and mortality. The HCMV chemokine receptor US28 is implicated in the regulation of viral latency and reactivation. To explore the role of US28 signaling in latency and reactivation, we analyzed protein tyrosine kinase signaling in CD34+ HPCs expressing US28. US28-ligand signaling in CD34+ HPCs induced changes in key regulators of cellular activation and differentiation. In vitro latency and reactivation assays utilizing CD34+ HPCs indicated that US28 was required for viral reactivation but not latency establishment or maintenance. Similarly, humanized NSG mice (huNSG) infected with TB40E-GFP-US28stop failed to reactivate upon treatment with granulocyte-colony-stimulating factor, but viral genome levels were maintained. Interestingly, HCMV-mediated changes in hematopoiesis during latency in vivo and in vitro was also dependent upon US28, as US28 directly promoted differentiation toward the myeloid lineage. To determine whether US28 constitutive activity and/or ligand-binding activity were required for latency and reactivation, we infected both huNSG mice and CD34+ HPCs in vitro with HCMV TB40E-GFP containing the US28-R129A mutation (no CA) or Y16F mutation (no ligand binding). TB40E-GFP-US28-R129A was maintained during latency and exhibited normal reactivation kinetics. In contrast, TB40E-GFP-US28-Y16F exhibited high levels of viral genome during latency and reactivation, indicating that the virus did not establish latency. These data indicate that US28 is necessary for viral reactivation and ligand binding activity is required for viral latency, highlighting the complex role of US28 during HCMV latency and reactivation.IMPORTANCE Human cytomegalovirus (HCMV) can establish latency following infection of CD34+ hematopoietic progenitor cells (HPCs), and reactivation from latency is a significant cause of viral disease and accelerated graft failure in bone marrow and solid-organ transplant patients. The precise molecular mechanisms of HCMV infection in HPCs are not well defined; however, select viral gene products are known to regulate aspects of latency and reactivation. The HCMV-encoded chemokine receptor US28, which binds multiple CC chemokines as well as CX3CR1, is expressed both during latent and lytic phases of the virus life cycle and plays a role in latency and reactivation. However, the specific timing of US28 expression and the role of ligand binding in these processes are not well defined. In this report, we determined that US28 is required for reactivation but not for maintaining latency. However, when present during latency, US28 ligand binding activity is critical to maintaining the virus in a quiescent state. We attribute the regulation of both latency and reactivation to the role of US28 in promoting myeloid lineage cell differentiation. These data highlight the dynamic and multifunctional nature of US28 during HCMV latency and reactivation.
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Affiliation(s)
- Lindsey B Crawford
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Patrizia Caposio
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Craig Kreklywich
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Andrew H Pham
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Meaghan H Hancock
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Taylor A Jones
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Patricia P Smith
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Andrew D Yurochko
- Department of Microbiology and Immunology, Louisiana State University at Shreveport, Shreveport, Louisiana, USA
| | - Jay A Nelson
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
| | - Daniel N Streblow
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, USA
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42
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Hancock MH, Skalsky RL. Roles of Non-coding RNAs During Herpesvirus Infection. Curr Top Microbiol Immunol 2019; 419:243-280. [PMID: 28674945 DOI: 10.1007/82_2017_31] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Non-coding RNAs (ncRNAs) play essential roles in multiple aspects of the life cycles of herpesviruses and contribute to lifelong persistence of herpesviruses within their respective hosts. In this chapter, we discuss the types of ncRNAs produced by the different herpesvirus families during infection, some of the cellular ncRNAs manipulated by these viruses, and the overall contributions of ncRNAs to the viral life cycle, influence on the host environment, and pathogenesis.
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Affiliation(s)
- Meaghan H Hancock
- Vaccine and Gene Therapy Institute at Oregon Health and Science University, Beaverton, OR, USA
| | - Rebecca L Skalsky
- Vaccine and Gene Therapy Institute at Oregon Health and Science University, Beaverton, OR, USA.
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Abstract
Herpesviruses encode miRNAs that target both virus and host genes; however their role in herpesvirus biology is still poorly understood. We previously identified thirty five miRNAs encoded by OvHV-2; the causative agent of malignant catarrhal fever (MCF) and are investigating the role of these miRNAs in regulating expression of OvHV-2 genes that play important roles in virus biology. Analysis, using RNAHybrid predicted that two OvHV-2 encoded miRNAs, ovhv2-miR-17-10 and ovhv2-miR-61-1, target transcripts coding for the OvHV-2 bZIP protein Ov2. In other herpesvirus bZIP proteins are known to play important roles in lytic virus replication. Here we show by Flow cytometry and western blotting that ovhv2-miR-17-10 and ovhv2-miR-61-1, reduce the expression of Ov2 protein. The predicted target sites for both miRNAs within the Ov2 gene were disrupted whilst retaining the Ov2 coding sequence. Mutation of the ovhv2-miR-61-1 target sequence restored Ov2 protein expression levels to control levels confirming the identity of its target site. However, it was not possible to determine the binding site of ovhv2-miR-17-10 possibly due to potential G:U pairing introduced during the mutation process. The targeting of Ov2 by two virus-encoded miRNAs suggests an important regulatory role for Ov2 in OvHV-2 replication or reactivation.
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44
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Lou YY, Wang QD, Lu YT, Tu MY, Xu X, Xia Y, Peng Y, Lai MM, Zheng XQ. Differential circRNA expression profiles in latent human cytomegalovirus infection and validation using clinical samples. Physiol Genomics 2018; 51:51-58. [PMID: 30576257 DOI: 10.1152/physiolgenomics.00096.2018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Human cytomegalovirus (HCMV) is an opportunistic prototypic beta-herpesvirus that can cause severe and even fatal diseases in immune-naive newborns and immunocompromised adults. Host-virus interactions occurring at the transcriptional and posttranscriptional levels are critical for establishing an HCMV latent or lytic infection, but the mechanisms remain poorly understood. Herein, we investigated the expression of circRNAs in human leukemia monocytes (THP-1 cells) latently infected with HCMV and explored the diagnostic value of circRNAs in children with HCMV infection. A total of 2,110 and 1,912 circRNAs were identified in mock-infected and HCMV latent-infected THP-1 cells, respectively. Of these, we identified 1,421 differently expressed circRNAs, of which 650 were upregulated and 771 were downregulated. The host genes corresponding to the differentially expressed circRNAs were mainly involved in the regulation of host cell secretion pathways, cell cycle, and cell apoptosis. The differentially expressed circRNAs had binding sites for microRNAs, suggesting an important role in the mechanism of HCMV latent infection. Furthermore, a clinical analysis showed that the expression levels of hsa_circ_0001445 and hsa_circ_0001206 were statistically significantly different in HCMV-infected patients vs. normal controls, suggesting that these circRNAs could potentially serve as biomarkers of HCMV-infection.
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Affiliation(s)
- Yun-Yan Lou
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Qiong-Dan Wang
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Yu-Tian Lu
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Meng-Yun Tu
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Xi Xu
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Ying Xia
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Ying Peng
- School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Mei-Mei Lai
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
| | - Xiao-Qun Zheng
- Department of Clinical Laboratory, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou, Zhejiang , China.,School of Laboratory Medicine and Life Sciences, Wenzhou Medical University , Wenzhou, Zhejiang , China.,Key Laboratory of Laboratory Medicine, Ministry of Education , Wenzhou, Zhejiang , China
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MicroRNAs derived from the insect virus HzNV-1 promote lytic infection by suppressing histone methylation. Sci Rep 2018; 8:17817. [PMID: 30546025 PMCID: PMC6292938 DOI: 10.1038/s41598-018-35782-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/06/2018] [Indexed: 12/19/2022] Open
Abstract
Heliothis zea nudivirus-1 (HzNV-1) is an insect virus that can induce both lytic and latent infections in various insect cell lines. During latent infection, several microRNAs (miRNAs) are produced from persistency-associated gene 1 (pag1) as the only detectable HzNV-1 transcript. Previous studies have shown that the pag1 gene suppresses the immediate-early gene hhi1 and promotes host switching into a latent infection via miRNAs derived from pag1. Although other functions of the miRNAs derived from pag1 have not yet been elucidated, several studies have suggested that miRNAs encoded from latency-associated genes can regulate histone-associated enzymes. Because pag1 is a noncoding transcript, it potentially regulates host chromatin structure through miRNAs upon infection. Nevertheless, the exact mechanism by which pag1 alters viral infections remains unknown. In this study, we found that the pag1-encoded miRNA miR-420 suppresses expression of the histone modification-associated enzyme su(var)3-9. Therefore, this miRNA causes histone modification to promote HzNV-1 infection. These results suggest that HzNV-1 may directly influence epigenetic regulation in host cells through interactions with pag1 miRNAs to promote lytic infection. This study provides us with a better understanding of both the HzNV-1 infection pathway and the relationship between viral miRNAs and epigenetic regulation.
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Cokarić Brdovčak M, Zubković A, Jurak I. Herpes Simplex Virus 1 Deregulation of Host MicroRNAs. Noncoding RNA 2018; 4:ncrna4040036. [PMID: 30477082 PMCID: PMC6316616 DOI: 10.3390/ncrna4040036] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/15/2018] [Accepted: 11/19/2018] [Indexed: 02/06/2023] Open
Abstract
Viruses utilize microRNAs (miRNAs) in a vast variety of possible interactions and mechanisms, apparently far beyond the classical understanding of gene repression in humans. Likewise, herpes simplex virus 1 (HSV-1) expresses numerous miRNAs and deregulates the expression of host miRNAs. Several HSV-1 miRNAs are abundantly expressed in latency, some of which are encoded antisense to transcripts of important productive infection genes, indicating their roles in repressing the productive cycle and/or in maintenance/reactivation from latency. In addition, HSV-1 also exploits host miRNAs to advance its replication or repress its genes to facilitate latency. Here, we discuss what is known about the functional interplay between HSV-1 and the host miRNA machinery, potential targets, and the molecular mechanisms leading to an efficient virus replication and spread.
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Affiliation(s)
- Maja Cokarić Brdovčak
- Laboratory for Molecular Virology, Department of Biotechnology, University of Rijeka, R. Matejčić 2, HR-51000 Rijeka, Croatia.
| | - Andreja Zubković
- Laboratory for Molecular Virology, Department of Biotechnology, University of Rijeka, R. Matejčić 2, HR-51000 Rijeka, Croatia.
| | - Igor Jurak
- Laboratory for Molecular Virology, Department of Biotechnology, University of Rijeka, R. Matejčić 2, HR-51000 Rijeka, Croatia.
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47
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HCMV miRNA Targets Reveal Important Cellular Pathways for Viral Replication, Latency, and Reactivation. Noncoding RNA 2018; 4:ncrna4040029. [PMID: 30360396 PMCID: PMC6315856 DOI: 10.3390/ncrna4040029] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/12/2018] [Accepted: 10/17/2018] [Indexed: 02/06/2023] Open
Abstract
It is now well appreciated that microRNAs (miRNAs) play a critical role in the lifecycles of many herpes viruses. The human cytomegalovirus (HCMV) replication cycle varies significantly depending on the cell type infected, with lytic replication occurring in fully-differentiated cells such as fibroblasts, endothelial cells, or macrophages, and latent infection occurring in less-differentiated CD14+ monocytes and CD34+ hematopoietic progenitor cells where viral gene expression is severely diminished and progeny virus is not produced. Given their non-immunogenic nature and their capacity to target numerous cellular and viral transcripts, miRNAs represent a particularly advantageous means for HCMV to manipulate viral gene expression and cellular signaling pathways during lytic and latent infection. This review will focus on our current knowledge of HCMV miRNA viral and cellular targets, and discuss their importance in lytic and latent infection, highlight the challenges of studying HCMV miRNAs, and describe how viral miRNAs can help us to better understand the cellular processes involved in HCMV latency.
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48
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Bernier A, Sagan SM. The Diverse Roles of microRNAs at the Host⁻Virus Interface. Viruses 2018; 10:v10080440. [PMID: 30126238 PMCID: PMC6116274 DOI: 10.3390/v10080440] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/16/2018] [Accepted: 08/17/2018] [Indexed: 12/12/2022] Open
Abstract
MicroRNAs (miRNAs) are small, non-coding RNAs that regulate gene expression at the post-transcriptional level. Through this activity, they are implicated in almost every cellular process investigated to date. Hence, it is not surprising that miRNAs play diverse roles in regulation of viral infections and antiviral responses. Diverse families of DNA and RNA viruses have been shown to take advantage of cellular miRNAs or produce virally encoded miRNAs that alter host or viral gene expression. MiRNA-mediated changes in gene expression have been demonstrated to modulate viral replication, antiviral immune responses, viral latency, and pathogenesis. Interestingly, viruses mediate both canonical and non-canonical interactions with miRNAs to downregulate specific targets or to promote viral genome stability, translation, and/or RNA accumulation. In this review, we focus on recent findings elucidating several key mechanisms employed by diverse virus families, with a focus on miRNAs at the host–virus interface during herpesvirus, polyomavirus, retroviruses, pestivirus, and hepacivirus infections.
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Affiliation(s)
- Annie Bernier
- Department of Microbiology & Immunology, McGill University, Montréal, QC H3G 1Y6, Canada.
| | - Selena M Sagan
- Department of Microbiology & Immunology, McGill University, Montréal, QC H3G 1Y6, Canada.
- Department of Biochemistry, McGill University, Montréal, QC H3G 1Y6, Canada.
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Inhibition of expression of BmNPV cg30 by bmo-miRNA-390 is a host response to baculovirus invasion. Arch Virol 2018; 163:2719-2725. [PMID: 29948378 DOI: 10.1007/s00705-018-3912-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 05/30/2018] [Indexed: 12/23/2022]
Abstract
Bombyx mori larvae exhibit in vivo defensive reactions immediately after invasion by a virus. One of these defense systems is to express appropriate microRNAs (miRNAs) to respond to the infection. A novel Bombyx mori-encoded miRNA, bmo-miR-390, was identified previously by high-throughput sequencing. Based on bioinformatic predictions, the Bombyx mori nuclear polyhedrosis virus cg30 gene (BmNPV-cg30) is one of the target genes of bmo-miR-390. In this study, expression vectors with an enhanced green fluorescence protein (EGFP) or a luciferase (luc) reporter gene together with bm-miR-390 or the cg30 3' UTR were constructed and used to co-transfect BmN cells. Using a dual luciferase reporter (DLR) assay, we found that bmo-miR-390 significantly downregulates the expression of BmNPV-cg30 (P < 0.05) in vitro. Moreover, artificially synthesized bmo-miR-390 mimics enhanced the regulatory effect of bmo-miR-390, while an inhibitor eliminated the inhibitory effect. These results show for the first time that bmo-miR-390 can effectively downregulate the expression of BmNPV-cg30 in BmNPV-infected BmN cells.
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50
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Sehrawat S, Kumar D, Rouse BT. Herpesviruses: Harmonious Pathogens but Relevant Cofactors in Other Diseases? Front Cell Infect Microbiol 2018; 8:177. [PMID: 29888215 PMCID: PMC5981231 DOI: 10.3389/fcimb.2018.00177] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/08/2018] [Indexed: 11/24/2022] Open
Abstract
Most vertebrates are infected with one or more herpesviruses and remain so for the rest of their lives. The relationship of immunocompetent healthy host with herpesviruses may sometime be considered as harmonious. However, clinically severe diseases can occur when host immunity is compromised due to aging, during some stress response, co-infections or during neoplastic disease conditions. Discord can also occur during iatrogenic immunosuppression used for controlling graft rejection, in some primary genetic immunodeficiencies as well as when the virus infects a non-native host. In this review, we discuss such issues and their influence on host-herpesvirus interaction.
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Affiliation(s)
- Sharvan Sehrawat
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Mohali, India
| | - Dhaneshwar Kumar
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Mohali, India
| | - Barry T Rouse
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Sciences, The University of Tennessee, Knoxville, Knoxville, TN, United States
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