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PD-L1 upregulation by lytic induction of Epstein-Barr Virus.
- Source :
-
Virology [Virology] 2022 Mar; Vol. 568, pp. 31-40. Date of Electronic Publication: 2022 Jan 20. - Publication Year :
- 2022
-
Abstract
- Epstein-Barr virus (EBV) is an etiologic agent of infectious mononucleosis and several malignancies. Here, we found that reactivation of EBV resulted in increased programmed cell death-ligand 1 (PD-L1) expression in a cell type-dependent manner. Lytic induction in EBV-positive Akata, AGS, MutuI, and Jijoye cell lines increased PD-L1 levels, but cells such as EBV-negative Akata, MutuIII, and P3HR1 did not have increased PD-L1. EBV in the P3HR1 cell line has a deletion in the EBNA2 gene, while EBV in its parental cell line, Jijoye, has the complete EBNA2 gene. PD-L1 expression by lytic induction was reduced when EBNA2 was knocked down. In addition, pharmacological inhibition indicated involvement of nuclear factor kappa B, mitogen-activated protein kinase, and AKT signaling. These results suggest that EBV likely evades immunity by inducing PD-L1 upon reactivation, through the increased expression of EBNA2 and activation of signaling pathways.<br /> (Copyright © 2022 Elsevier Inc. All rights reserved.)
- Subjects :
- B7-H1 Antigen metabolism
Cell Line
Cells, Cultured
Epstein-Barr Virus Infections metabolism
Epstein-Barr Virus Nuclear Antigens genetics
Gene Knockdown Techniques
Humans
NF-kappa B metabolism
Proto-Oncogene Proteins c-akt metabolism
Signal Transduction
Up-Regulation
Viral Proteins genetics
B7-H1 Antigen genetics
Epstein-Barr Virus Infections genetics
Epstein-Barr Virus Infections virology
Gene Expression Regulation
Herpesvirus 4, Human physiology
Host-Pathogen Interactions genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1096-0341
- Volume :
- 568
- Database :
- MEDLINE
- Journal :
- Virology
- Publication Type :
- Academic Journal
- Accession number :
- 35093708
- Full Text :
- https://doi.org/10.1016/j.virol.2022.01.006