Human Cytomegalovirus Delays Neutrophil Apoptosis and Stimulates the Release of a Prosurvival Secretome
Author(s)
Type
Journal Article
Abstract
Human cytomegalovirus (HCMV) is a major cause of viral disease in the young and the immune-suppressed. At sites of infection, HCMV recruits the neutrophil, a cell with a key role in orchestrating the initial immune response. Herein, we report a profound survival response in human neutrophils exposed to the clinical HCMV isolate Merlin, but not evident with the attenuated strain AD169, through suppression of apoptosis. The initial survival event, which is independent of viral gene expression and involves activation of the ERK/MAPK and NF-κB pathways, is augmented by HCMV-stimulated release of a secretory cytokine profile that further prolongs neutrophil lifespan. As aberrant neutrophil survival contributes to tissue damage, we predict that this may be relevant to the immune pathology of HCMV, and the presence of this effect in clinical HCMV strains and its absence in attenuated strains implies a beneficial effect to the virus in pathogenesis and/or dissemination. In addition, we show that HCMV-exposed neutrophils release factors that enhance monocyte recruitment and drive monocyte differentiation to a HCMV-permissive phenotype in an IL-6-dependent manner, thus providing an ideal vehicle for viral dissemination. This study increases understanding of HCMV–neutrophil interactions, highlighting the potential role of neutrophil recruitment as a virulence mechanism to promote HCMV pathology in the host and influence the dissemination of HCMV infection. Targeting these mechanisms may lead to new antiviral strategies aimed at limiting host damage and inhibiting viral spread.
Date Issued
2017-09-25
Date Acceptance
2017-09-07
Citation
FRONTIERS IN IMMUNOLOGY, 2017, 8
ISSN
1664-3224
Publisher
FRONTIERS MEDIA SA
Journal / Book Title
FRONTIERS IN IMMUNOLOGY
Volume
8
Copyright Statement
© 2017 Pocock, Storisteanu, Reeves, Juss, Wills, Cowburn and Chilvers. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000411599200002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Life Sciences & Biomedicine
Immunology
human cytomegalovirus
neutrophil
monocyte
polymorphonuclear leukocyte
apoptosis
NF-KAPPA-B
INFECTED ENDOTHELIAL-CELLS
POLYMORPHONUCLEAR LEUKOCYTES
IN-VITRO
TRANSENDOTHELIAL MIGRATION
HUMAN ALPHA-DEFENSIN-1
TRANSPLANT RECIPIENTS
INSITU HYBRIDIZATION
IMMUNE-RESPONSES
GENE-EXPRESSION
Publication Status
Published
Article Number
ARTN 1185
Date Publish Online
2017-09-25