Repository logo
 

HCMV activation of ERK-MAPK drives a multi-factorial response promoting the survival of infected myeloid progenitors

Published version
Peer-reviewed

Loading...
Thumbnail Image

Type

Article

Change log

Authors

Kew, V 
Reeves, M 

Abstract

Viral binding and entry provides the first trigger of a cell death response and thus how human cytomegalovirus (HCMV) evades this - particularly during latent infection where a very limited pattern of gene expression is observed - is less well understood. It has been demonstrated that the activation of cellular signalling pathways upon virus binding promotes the survival of latently infected cells by the activation of cell encoded anti-apoptotic responses. In CD34+ cells, a major site of HCMV latency, ERK signalling is important for survival and we now show that the activation of this pathway impacts on multiple aspects of cell death pathways. The data illustrate that HCMV infection triggers activation of pro-apoptotic Bak which is then countered through multiple ERK-dependent functions. Specifically, ERK promotes ELK1 mediated transcription of the key survival molecule MCL-1, along with a concomitant decrease of the pro-apoptotic BIM and PUMA proteins. Finally, we show that the elimination of ELK-1 from CD34+ cells results in elevated Bak activation in response to viral infection, resulting in cell death. Taken together, these data begin to shed light on the poly-functional response elicited by HCMV via ERK-MAPK to promote cell survival.

Description

Keywords

0601 Biochemistry and Cell Biology, Biomedical, Basic Science, Infectious Diseases, Infection, Generic Health Relevance, 2.2 Factors relating to physical environment

Journal Title

Journal of Molecular Biochemistry

Conference Name

Journal ISSN

2241-0090
2241-0090

Volume Title

6

Publisher

Lorem Ipsum Press

Publisher DOI

Sponsorship
MRC (G0900466/1)
This work was funded by a Medical Research Council Fellowship (G:0900466) awarded to MBR. MRW is funded bv the Medical Research Council Programme Grants (G:0701279 & MR/K021087/1). The funders had no role in study design, data collection and interpretation, or decision to submit the work for publication.