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Caetano BFR, Rocha VL, Rossini BC, Dos Santos LD, Elgui De Oliveira D. Epstein-Barr Virus miR-BARTs 7 and 9 modulate viral cycle, cell proliferation, and proteomic profiles in Burkitt lymphoma. Tumour Virus Res 2024; 17:200276. [PMID: 38159643 PMCID: PMC11000110 DOI: 10.1016/j.tvr.2023.200276] [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: 11/28/2023] [Accepted: 12/26/2023] [Indexed: 01/03/2024] Open
Abstract
The Epstein-Barr Virus (EBV) encodes viral microRNAs (miRs) that have been implicated in the pathogenesis of nasopharyngeal and gastric carcinomas, yet their potential roles in lymphomas remain to be fully elucidated. This study evaluated the impact of CRISPR/Cas9-mediated knockdown of EBV miRs BART-7 and BART-9 in EBV-positive Burkitt lymphoma cells Akata. As anticipated, the Akata cells subjected to CRISPR/Cas9-mediated knockdown of either EBV BART-7 or BART-9 exhibited a significant reduction in the expression of these viral miRs compared to cells with wild-type (wt) EBV genomes. This outcome effectively validates the experimental model employed in this study. Knocking down either BART-7 or BART-9 resulted in a notable reduction in cell viability and proliferation rates, alongside an elevation in the expression of EBV lytic genes. Global proteomic analysis revealed that the knockdown of EBV BART-7 significantly decreased the expression of ubiquitin/proteasome proteins while concurrently increasing RNA binding proteins (RBPs). Conversely, BART-9 knockdown reduced proteins associated with oxidoreductase activity, particularly those involved in fatty acid metabolism. Our findings unveil previously undiscovered EBV miRs BARTs 7 and 9 roles in cellular pathways relevant to both viral biology and lymphomagenesis.
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Affiliation(s)
- Brunno Felipe Ramos Caetano
- São Paulo State University (UNESP), Department of Pathology, Botucatu Medical School, Av. Prof. Dr. Mário Rubens Guimarães Montenegro S/n, CEP 18618-687, Botucatu, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Biotechnology (IBTEC), Alameda Das Tecomarias S/n, CEP 18607-440, Botucatu, São Paulo, Brazil.
| | - Viviana Loureiro Rocha
- São Paulo State University (UNESP), Institute of Biotechnology (IBTEC), Alameda Das Tecomarias S/n, CEP 18607-440, Botucatu, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Biosciences (IBB). R. Prof. Dr. Antônio Celso Wagner Zanin, 250, CEP 18618-689, Botucatu, São Paulo, Brazil.
| | - Bruno Cesar Rossini
- São Paulo State University (UNESP), Institute of Biotechnology (IBTEC), Alameda Das Tecomarias S/n, CEP 18607-440, Botucatu, São Paulo, Brazil.
| | - Lucilene Delazari Dos Santos
- São Paulo State University (UNESP), Institute of Biotechnology (IBTEC), Alameda Das Tecomarias S/n, CEP 18607-440, Botucatu, São Paulo, Brazil.
| | - Deilson Elgui De Oliveira
- São Paulo State University (UNESP), Department of Pathology, Botucatu Medical School, Av. Prof. Dr. Mário Rubens Guimarães Montenegro S/n, CEP 18618-687, Botucatu, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Biotechnology (IBTEC), Alameda Das Tecomarias S/n, CEP 18607-440, Botucatu, São Paulo, Brazil.
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Chen Y, Kincaid RP, Bastin K, Fachko DN, Skalsky RL. MicroRNA-focused CRISPR/Cas9 screen identifies miR-142 as a key regulator of Epstein-Barr virus reactivation. PLoS Pathog 2024; 20:e1011970. [PMID: 38885264 PMCID: PMC11213311 DOI: 10.1371/journal.ppat.1011970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 06/28/2024] [Accepted: 05/27/2024] [Indexed: 06/20/2024] Open
Abstract
Reactivation from latency plays a significant role in maintaining persistent lifelong Epstein-Barr virus (EBV) infection. Mechanisms governing successful activation and progression of the EBV lytic phase are not fully understood. EBV expresses multiple viral microRNAs (miRNAs) and manipulates several cellular miRNAs to support viral infection. To gain insight into the host miRNAs regulating transitions from EBV latency into the lytic stage, we conducted a CRISPR/Cas9-based screen in EBV+ Burkitt lymphoma (BL) cells using anti-Ig antibodies to crosslink the B cell receptor (BCR) and induce reactivation. Using a gRNA library against >1500 annotated human miRNAs, we identified miR-142 as a key regulator of EBV reactivation. Genetic ablation of miR-142 enhanced levels of immediate early and early lytic gene products in infected BL cells. Ago2-PAR-CLIP experiments with reactivated cells revealed miR-142 targets related to Erk/MAPK signaling, including components directly downstream of the B cell receptor (BCR). Consistent with these findings, disruption of miR-142 enhanced SOS1 levels and Mek phosphorylation in response to surface Ig cross-linking. Effects could be rescued by inhibitors of Mek (cobimetinib) or Raf (dabrafenib). Taken together, these results show that miR-142 functionally regulates SOS1/Ras/Raf/Mek/Erk signaling initiated through the BCR and consequently, restricts EBV entry into the lytic cycle.
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Affiliation(s)
- Yan Chen
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Rodney P. Kincaid
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Kelley Bastin
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Devin N. Fachko
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Rebecca L. Skalsky
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
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Zhang C, Liu Y, Yang F, Liu Y, Wang N, Li Y, Liu Y, Qiu Z, Zhang L, You X, Gan L. MicroRNA-194-5p/Heparin-binding EGF-like growth factor signaling mediates dexamethasone-induced activation of pseudorabies virus in rat pheochromocytoma cells. Vet Microbiol 2024; 290:109974. [PMID: 38262115 DOI: 10.1016/j.vetmic.2023.109974] [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: 11/14/2023] [Revised: 12/21/2023] [Accepted: 12/28/2023] [Indexed: 01/25/2024]
Abstract
Pseudorabies virus (PRV) is a neurotropic virus, which infects a wide range of mammals. The activity of PRV is gradually suppressed in hosts that have tolerated the primary infection. Increased glucocorticoid levels resulting from stressful stimuli overcome repression of PRV activity. However, the host cell mechanism involved in the activation processes under stressful conditions remains unclear. In this study, infection of rat PC-12 pheochromocytoma cells with neuronal properties using PRV at a multiplicity of infection (MOI) = 1 for 24 h made the activity of PRV be the relatively repressed state, and then incubation with 0.5 μM of the corticosteroid dexamethasone (DEX) for 4 h overcomes the relative repression of PRV activity. RNA-seq deep sequencing and bioinformatics analyses revealed different microRNA and mRNA profiles of PC-12 cells with/without PRV and/or DEX treatment. qRT-PCR and western blot analyses confirmed the negative regulatory relationship of miRNA-194-5p and its target heparin-binding EGF-like growth factor (Hbegf); a dual-luciferase reporter assay revealed that Hbegf is directly targeted by miRNA-194-5p. Further, miRNA-194-5p mock transfection contributed to PRV activation, Hbegf was downregulated in DEX-treated PRV infection cells, and Hbegf overexpression contributed to returning activated PRV to the repression state. Moreover, miRNA-194-5p overexpression resulted in reduced levels of HBEGF, c-JUN, and p-EGFR, whereas Hbegf overexpression suppressed the reduction caused by miRNA-194-5p overexpression. Overall, this study is the first to report that changes in the miR-194-5p-HBEGF/EGFR pathway in neurons are involved in DEX-induced activation of PRV, laying a foundation for the clinical prevention of stress-induced PRV activation.
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Affiliation(s)
- Chen Zhang
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Yuxuan Liu
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Fan Yang
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Yifan Liu
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Naixiu Wang
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Yuhang Li
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Yanqing Liu
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Zhiyun Qiu
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Lin Zhang
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Xiaoyan You
- Key Laboratory of Pig Industry Sciences, Ministry of Agriculture and Rural Affairs, Chongqing, China; Chongqing Key Laboratory of Pig Industry Sciences, Chongqing, China
| | - Ling Gan
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China.
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Kashyap D, Rele S, Bagde PH, Saini V, Chatterjee D, Jain AK, Pandey RK, Jha HC. Comprehensive insight into altered host cell-signaling cascades upon Helicobacter pylori and Epstein-Barr virus infections in cancer. Arch Microbiol 2023; 205:262. [PMID: 37310490 DOI: 10.1007/s00203-023-03598-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 06/14/2023]
Abstract
Cancer is characterized by mutagenic events that lead to disrupted cell signaling and cellular functions. It is one of the leading causes of death worldwide. Literature suggests that pathogens, mainly Helicobacter pylori and Epstein-Barr virus (EBV), have been associated with the etiology of human cancer. Notably, their co-infection may lead to gastric cancer. Pathogen-mediated DNA damage could be the first and crucial step in the carcinogenesis process that modulates numerous cellular signaling pathways. Altogether, it dysregulates the metabolic pathways linked with cell growth, apoptosis, and DNA repair. Modulation in these pathways leads to abnormal growth and proliferation. Several signaling pathways such RTK, RAS/MAPK, PI3K/Akt, NFκB, JAK/STAT, HIF1α, and Wnt/β-catenin are known to be altered in cancer. Therefore, this review focuses on the oncogenic roles of H. pylori, EBV, and its associated signaling cascades in various cancers. Scrutinizing these signaling pathways is crucial and may provide new insights and targets for preventing and treating H. pylori and EBV-associated cancers.
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Affiliation(s)
- Dharmendra Kashyap
- Lab No. POD 1B 602, Infection Bio-Engineering Group, Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India
| | - Samiksha Rele
- Lab No. POD 1B 602, Infection Bio-Engineering Group, Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India
| | - Pranit Hemant Bagde
- Lab No. POD 1B 602, Infection Bio-Engineering Group, Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India
| | - Vaishali Saini
- Lab No. POD 1B 602, Infection Bio-Engineering Group, Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India
| | | | | | - Rajan Kumar Pandey
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, 17177, Solna, Sweden
| | - Hem Chandra Jha
- Lab No. POD 1B 602, Infection Bio-Engineering Group, Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India.
- Centre for Rural Development and Technology, Indian Institute of Technology Indore, Madhya Pradesh, 453552, Indore, India.
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Skalsky RL. MicroRNA-mediated control of Epstein-Barr virus infection and potential diagnostic and therapeutic implications. Curr Opin Virol 2022; 56:101272. [PMID: 36242893 DOI: 10.1016/j.coviro.2022.101272] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 09/07/2022] [Accepted: 09/15/2022] [Indexed: 11/03/2022]
Abstract
Herpesviruses, such as Epstein-Barr virus (EBV), encode multiple viral microRNAs that are expressed throughout various infection stages. While much progress has been made in evaluating both the viral and host microRNAs (miRNAs) that are detected during infection as well as elucidating their molecular targets in vitro, our understanding of their contributions to pathogenesis in vivo, viral oncogenesis, and clinical implications for these small molecules remains limited. miRNAs are widely recognized as key regulators of global cellular processes, including apoptosis, cell differentiation, and development of immune responses. This review discusses the roles of miRNAs in EBV infection and current advances in miRNA-based diagnostic and therapeutic strategies potentially applicable toward EBV-associated diseases.
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Affiliation(s)
- Rebecca L Skalsky
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, OR, USA.
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Cai J, Zhang B, Li Y, Zhu W, Akihisa T, Li W, Kikuchi T, Liu W, Feng F, Zhang J. Prophylactic and Therapeutic EBV Vaccines: Major Scientific Obstacles, Historical Progress, and Future Direction. Vaccines (Basel) 2021; 9:vaccines9111290. [PMID: 34835222 PMCID: PMC8623587 DOI: 10.3390/vaccines9111290] [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: 09/01/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 11/29/2022] Open
Abstract
The Epstein-Barr virus (EBV) infects more than 95% of adults worldwide and is associated with various malignant tumors and immune diseases, imparting a huge disease burden on the human population. Available EBV vaccines are imminent. Prophylactic vaccines can effectively prevent the spread of infection, whereas therapeutic vaccines mainly stimulate cell-mediated immunity and kill infected cells, thus curbing the development of malignant tumors. Nevertheless, there are still no approved EBV vaccines after decades of effort. The complexity of the EBV life cycle, the lack of appropriate animal models, and the limited reports on adjuvant selection and immune responses are gravely impeding progress in EBV vaccines. The soluble gp350 vaccine could reduce the incidence of infectious mononucleosis (IM), which seemed to offer hope, but could not prevent EBV infection. Continuous research and vaccine trials provide deep insights into the structural biology of viruses, the designs for immunogenicity, and the evolving vaccine platforms. Moreover, the new vaccine candidates are expected to achieve further success via combined immunization to elicit both a dual protection of B cells and epithelial cells, and sustainable immunization against infected cells at several phases of infection.
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Affiliation(s)
- Jing Cai
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (J.C.); (B.Z.); (Y.L.); (T.A.); (F.F.)
| | - Bodou Zhang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (J.C.); (B.Z.); (Y.L.); (T.A.); (F.F.)
| | - Yuqi Li
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (J.C.); (B.Z.); (Y.L.); (T.A.); (F.F.)
| | - Wanfang Zhu
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (W.Z.); (W.L.)
| | - Toshihiro Akihisa
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (J.C.); (B.Z.); (Y.L.); (T.A.); (F.F.)
- Research Institute for Science and Technology, Tokyo University of Science, Chiba 278-8510, Japan
| | - Wei Li
- Faculty of Pharmaceutical Sciences, Toho University, Chiba 274-8510, Japan; (W.L.); (T.K.)
| | - Takashi Kikuchi
- Faculty of Pharmaceutical Sciences, Toho University, Chiba 274-8510, Japan; (W.L.); (T.K.)
| | - Wenyuan Liu
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (W.Z.); (W.L.)
| | - Feng Feng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (J.C.); (B.Z.); (Y.L.); (T.A.); (F.F.)
- Jiangsu Food and Pharmaceutical Science College, Huaian 223003, China
| | - Jie Zhang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, China; (J.C.); (B.Z.); (Y.L.); (T.A.); (F.F.)
- Jiangsu Food and Pharmaceutical Science College, Huaian 223003, China
- Correspondence:
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Virus-Induced Tumorigenesis and IFN System. BIOLOGY 2021; 10:biology10100994. [PMID: 34681093 PMCID: PMC8533565 DOI: 10.3390/biology10100994] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/01/2021] [Accepted: 09/27/2021] [Indexed: 01/11/2023]
Abstract
Oncogenic viruses favor the development of tumors in mammals by persistent infection and specific cellular pathways modifications by deregulating cell proliferation and inhibiting apoptosis. They counteract the cellular antiviral defense through viral proteins as well as specific cellular effectors involved in virus-induced tumorigenesis. Type I interferons (IFNs) are a family of cytokines critical not only for viral interference but also for their broad range of properties that go beyond the antiviral action. In fact, they can inhibit cell proliferation and modulate differentiation, apoptosis, and migration. However, their principal role is to regulate the development and activity of most effector cells of the innate and adaptive immune responses. Various are the mechanisms by which IFNs exert their effects on immune cells. They can act directly, through IFN receptor triggering, or indirectly by the induction of chemokines, the secretion of further cytokines, or by the stimulation of cells useful for the activation of particular immune cells. All the properties of IFNs are crucial in the host defense against viruses and bacteria, as well as in the immune surveillance against tumors. IFNs may be affected by and, in turn, affect signaling pathways to mediate anti-proliferative and antiviral responses in virus-induced tumorigenic context. New data on cellular and viral microRNAs (miRNAs) machinery, as well as cellular communication and microenvironment modification via classical secretion mechanisms and extracellular vesicles-mediated delivery are reported. Recent research is reviewed on the tumorigenesis induced by specific viruses with RNA or DNA genome, belonging to different families (i.e., HPV, HTLV-1, MCPyV, JCPyV, Herpesviruses, HBV, HCV) and the IFN system involvement.
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Roles of Lytic Viral Replication and Co-Infections in the Oncogenesis and Immune Control of the Epstein-Barr Virus. Cancers (Basel) 2021; 13:cancers13092275. [PMID: 34068598 PMCID: PMC8126045 DOI: 10.3390/cancers13092275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/04/2021] [Accepted: 05/05/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary The Epstein–Barr virus (EBV) colonizes more than 95% of the adult human population. Its cancer-forming potential is usually contained by lifelong immune control. Genetic alterations and immune modulation by co-infection point towards cytotoxic lymphocytes, such as natural killer and CD8+ T cells, as the main pillars of this immune protection. In this review, we discuss how the EBV infection program that leads to infectious virion production and co-infections, such as with malaria parasites, the human immunodeficiency virus (HIV) and the Kaposi sarcoma-associated herpesvirus (KSHV), modulate this immune control. Abstract Epstein–Barr virus (EBV) is the prototypic human tumor virus whose continuous lifelong immune control is required to prevent lymphomagenesis in the more than 90% of the human adult population that are healthy carriers of the virus. Here, we review recent evidence that this immune control has not only to target latent oncogenes, but also lytic replication of EBV. Furthermore, genetic variations identify the molecular machinery of cytotoxic lymphocytes as essential for this immune control and recent studies in mice with reconstituted human immune system components (humanized mice) have begun to provide insights into the mechanistic role of these molecules during EBV infection. Finally, EBV often does not act in isolation to cause disease. Some of EBV infection-modulating co-infections, including human immunodeficiency virus (HIV) and Kaposi sarcoma-associated herpesvirus (KSHV), have been modeled in humanized mice. These preclinical in vivo models for EBV infection, lymphomagenesis, and cell-mediated immune control do not only promise a better understanding of the biology of this human tumor virus, but also the possibility to explore vaccine candidates against it.
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