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Dai B, Chen AY, Corkum CP, Peroutka RJ, Landon A, Houng S, Muniandy PA, Zhang Y, Lehrmann E, Mazan-Mamczarz K, Steinhardt J, Shlyak M, Chen QC, Becker KG, Livak F, Michalak TI, Talwani R, Gartenhaus RB. Hepatitis C virus upregulates B-cell receptor signaling: a novel mechanism for HCV-associated B-cell lymphoproliferative disorders. Oncogene 2015; 35:2979-90. [PMID: 26434584 PMCID: PMC4821826 DOI: 10.1038/onc.2015.364] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 08/03/2015] [Accepted: 08/28/2015] [Indexed: 02/06/2023]
Abstract
B-cell receptor (BCR) signaling is essential for the development of B cells and has a critical role in B-cell neoplasia. Increasing evidence indicates an association between chronic hepatitis C virus (HCV) infection and B-cell lymphoma, however, the mechanisms by which HCV causes B-cell lymphoproliferative disorder are still unclear. Herein, we demonstrate the expression of HCV viral proteins in B cells of HCV-infected patients and show that HCV upregulates BCR signaling in human primary B cells. HCV nonstructural protein NS3/4A interacts with CHK2 and downregulates its activity, modulating HuR posttranscriptional regulation of a network of target mRNAs associated with B-cell lymphoproliferative disorders. Interestingly, the BCR signaling pathway was found to have the largest number of transcripts with increased association with HuR and was upregulated by NS3/4A. Our study reveals a previously unidentified role of NS3/4A in regulation of host BCR signaling during HCV infection, contributing to a better understanding of the molecular mechanisms underlying HCV-associated B-cell lymphoproliferative disorders.
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Affiliation(s)
- B Dai
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - A Y Chen
- Molecular Virology and Hepatology Research Group, Division of BioMedical Sciences, Faculty of Medicine, Memorial University, St John's, Newfoundland and Labrador, Canada
| | - C P Corkum
- Molecular Virology and Hepatology Research Group, Division of BioMedical Sciences, Faculty of Medicine, Memorial University, St John's, Newfoundland and Labrador, Canada
| | - R J Peroutka
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - A Landon
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - S Houng
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - P A Muniandy
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - Y Zhang
- Gene Expression and Genomics Unit, Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - E Lehrmann
- Gene Expression and Genomics Unit, Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - K Mazan-Mamczarz
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - J Steinhardt
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - M Shlyak
- Department of Infectious Diseases, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Q C Chen
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - K G Becker
- Gene Expression and Genomics Unit, Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - F Livak
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA
| | - T I Michalak
- Molecular Virology and Hepatology Research Group, Division of BioMedical Sciences, Faculty of Medicine, Memorial University, St John's, Newfoundland and Labrador, Canada
| | - R Talwani
- Department of Infectious Diseases, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - R B Gartenhaus
- Department of Medicine, Marlene and Stewart Greenebaum Cancer Center, University of Maryland, Baltimore, MD, USA.,Veterans Administration Medical Center, Baltimore, MD, USA
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