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Gantuz M, Lorenzetti MA, Chabay PA, Preciado MV. A novel recombinant variant of latent membrane protein 1 from Epstein Barr virus in Argentina denotes phylogeographical association. PLoS One 2017; 12:e0174221. [PMID: 28328987 PMCID: PMC5362222 DOI: 10.1371/journal.pone.0174221] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/05/2017] [Indexed: 12/15/2022] Open
Abstract
Epstein Barr virus (EBV) infection in Argentina occurs at an early age and occasionally develops infectious mononucleosis (IM). EBV is also related with lymphomas. LMP1, the viral oncoprotein is polymorphic and is used to define viral variants.
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Affiliation(s)
- Magdalena Gantuz
- Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP), CONICET-GCBA, Laboratorio de Biología Molecular, División Patología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
| | - Mario Alejandro Lorenzetti
- Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP), CONICET-GCBA, Laboratorio de Biología Molecular, División Patología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
| | - Paola Andrea Chabay
- Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP), CONICET-GCBA, Laboratorio de Biología Molecular, División Patología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
| | - María Victoria Preciado
- Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP), CONICET-GCBA, Laboratorio de Biología Molecular, División Patología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
- * E-mail:
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Harris-Arnold A, Arnold CP, Schaffert S, Hatton O, Krams SM, Esquivel CO, Martinez OM. Epstein-Barr virus modulates host cell microRNA-194 to promote IL-10 production and B lymphoma cell survival. Am J Transplant 2015; 15:2814-24. [PMID: 26147452 DOI: 10.1111/ajt.13375] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/19/2015] [Accepted: 04/28/2015] [Indexed: 01/25/2023]
Abstract
Epstein-Barr virus (EBV) is a γ-herpesvirus that is linked to the development of posttransplant lymphoproliferative disorder (PTLD) in solid organ recipients. We previously demonstrated that EBV(+) B cell lymphoma cell lines isolated from patients with PTLD produce human IL-10 as an autocrine growth factor. However, little is known regarding IL-10 regulation in B cells. Here we show that EBV infection markedly alters the expression of host B cell microRNA, a class of small noncoding RNA that is an important regulator of transcriptional and posttranscriptional gene expression. Gene arrays reveal unique microRNA profiles in EBV(+) B cell lymphoma lines from patients with PTLD, compared to normal B cells or in vitro generated EBV(+) lymphoblastoid cell lines. We show that microRNA-194 expression is uniquely suppressed in EBV(+) B cell lines from PTLD patients and that the 3'untranslated region of IL-10 is targeted by microRNA-194. Overexpression of microRNA-194 attenuates IL-10 production and increases apoptosis of EBV(+) B cell lymphoma lines. Together, these data indicate that EBV co-opts the host B cell microRNA network and specifically suppresses microRNA-194 to override control of IL-10 expression. Thus, modulation of microRNA-194 may constitute a novel approach to inhibiting proliferation of EBV(+) B cell lymphomas in PTLD.
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Affiliation(s)
- A Harris-Arnold
- Department of Surgery, Division of Abdominal Transplantation, Stanford University School of Medicine, Stanford, CA.,Program in Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA
| | - C P Arnold
- Program in Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA
| | - S Schaffert
- Department of Surgery, Division of Abdominal Transplantation, Stanford University School of Medicine, Stanford, CA.,Program in Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA
| | - O Hatton
- Department of Surgery, Division of Abdominal Transplantation, Stanford University School of Medicine, Stanford, CA.,Program in Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA
| | - S M Krams
- Department of Surgery, Division of Abdominal Transplantation, Stanford University School of Medicine, Stanford, CA.,Program in Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA
| | - C O Esquivel
- Department of Surgery, Division of Abdominal Transplantation, Stanford University School of Medicine, Stanford, CA
| | - O M Martinez
- Department of Surgery, Division of Abdominal Transplantation, Stanford University School of Medicine, Stanford, CA.,Program in Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA
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Lorenzetti MA, Gantuz M, Altcheh J, De Matteo E, Chabay PA, Preciado MV. Epstein-Barr virus BZLF1 gene polymorphisms: malignancy related or geographically distributed variants? Clin Microbiol Infect 2014; 20:O861-9. [PMID: 24666405 DOI: 10.1111/1469-0691.12631] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 03/21/2014] [Accepted: 03/21/2014] [Indexed: 11/29/2022]
Abstract
The ubiquitous Epstein-Barr virus (EBV) is related to the development of several lymphoid and epithelial malignancies and is also the aetiological agent for infectious mononucleosis (IM). BZLF1, an immediate early gene, plays a key role in modulating the switch from latency to lytic replication, hence enabling viral propagation. Polymorphic variations in the coded protein have been studied in other geographical regions in a search for viral factors that are inherent to malignancies and differ from those present in benign infections. In the present study, in samples of paediatric patients with benign IM and paediatric patients with malignant lymphomas, we detected previously described sequence variations as well as distinctive sequence polymorphisms from our region. By means of phylogenetic reconstruction, we characterized new phylogenetically distinct variants. Moreover, we described an association between specific variants and the studied pathologies in our region, particularly variant BZLF1-A2 with lymphomas and BZLF1-C with IM. Additionally, length polymorphisms within intron 1 were also assessed and compared between pathologies resulting in an association between 29-bp repeated units and lymphomas. In conclusion, this is the first report to characterize BZLF1 gene polymorphisms in paediatric patients from our geographical region and to suggest the association of these polymorphisms with malignant lymphomas.
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Affiliation(s)
- M A Lorenzetti
- Molecular Biology Laboratory, Pathology Division, Ricardo Gutiérrez Children Hospital, Buenos Aires, Argentina
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