Epstein-Barr Virus and latent membrane protein 1 modulate host B cell microRNA to promote cell survival
- Over 90% of humans are carriers for the B cell lymphotrophic [gamma]-herpes virus Epstein-Barr Virus (EBV). Though normally benign, EBV is the causative agent of infectious mononucleosis (IM) and is associated with multiple B cell malignancies, including post-transplant lymphoproliferative disease (PTLD). In immunodeficient and immune compromised individuals, proliferating EBV-infected B cells can progress to lymphoproliferative disease, transformation and malignancy due to the absence of a robust immune system to constrain the expansion of EBV-infected cells. Here we examine the expression of host cell microRNA in EBV-transformed B cells and following activation of the EBV viral oncogene latent membrane protein 1 (LMP1). We find that microRNA-194 is expressed at lower levels in EBV+ B lymphoma cell lines derived from patients with PTLD and that this microRNA is specifically suppressed by activation of tumor-derived LMP1 molecules. IL-10, required for autonomous growth of EBV-transformed B cells, is a direct target of microRNA-194. The overexpression of microRNA-194 in tumor-derived EBV-transformed B cells significantly decreased IL-10 production and significantly increased apoptosis. This phenotype was partially yet significantly rescued by the addition of exogenous IL-10. Thus, IL-10 expression, which acts as an autocrine growth factor for EBV+ B cell lymphomas, is promoted by EBV-induced suppression of microRNA-194.
|Type of resource
|electronic; electronic resource; remote
|1 online resource.
|Harris-Arnold, Aleishia Geraldine Christane
|Stanford University, Program in Immunology.
|Krams, Sheri Michele
|Krams, Sheri Michele
|Statement of responsibility
|Aleishia Geraldine Christane Harris-Arnold.
|Submitted to the Program in Immunology.
|Thesis (Ph.D.)--Stanford University, 2014.
- © 2014 by Aleishia Geraldine Christane Harris-Arnold
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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