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Goormachtigh, G.* ; Ouk, T.S.* ; Mougel, A.* ; Tranchand-Bunel, D.* ; Masy, E.* ; Le, Clorennec, C.* ; Feuillard, J.* ; Bornkamm, G.W. ; Auriault, C.* ; Manet, E.* ; Fafeur, V.* ; Adriaenssens, E.* ; Coll, J.*

Autoactivation of the Epstein-barr virus oncogenic protein LMP1 during type II latency through opposite roles of the NF-kB and JNK signaling pathways.

J. Virol. 80, 7382-7393 (2006)
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Epstein-Barr virus (EBV) is associated with several human malignancies where it expresses limited subsets of latent proteins. Of the latent proteins, latent membrane protein 1 (LMP1) is a potent transforming protein that constitutively induces multiple cell signaling pathways and contributes to EBV-associated oncogenesis. Regulation of LMP1 expression has been extensively described during the type III latency of EBV. Nevertheless, in the majority of EBV-associated tumors, the virus is commonly found to display a type II latency program in which it is still unknown which viral or cellular protein is really involved in maintaining LMP1 expression. Here, we demonstrate that LMP1 activates its own promoter pLMP1 through the JNK signaling pathway emerging from the TES2 domain. Our results also reveal that this activation is tightly controlled by LMP1, since pLMP1 is inhibited by LMP1-activated NF-κB signaling pathway. By using our physiological models of EBV-infected cells displaying type II latency as well as lymphoblastoid cell lines expressing a type III latency, we also demonstrate that this balanced autoregulation of LMP1 is shared by both latency programs. Finally, we show that this autoactivation is the most important mechanism to maintain LMP1 expression during the type II latency program of EBV. Copyright © 2006, American Society for Microbiology. All Rights Reserved.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
ISSN (print) / ISBN 0022-538X
e-ISSN 1098-5514
Journal Journal of Virology
Quellenangaben Volume: 80, Issue: 15, Pages: 7382-7393 Article Number: , Supplement: ,
Publisher American Society for Microbiology (ASM)
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Clinical Molecular Biology and Tumor Genetics (K.MOLBI)