Phagocytosis of picornavirus-infected cells induces an RNA-dependent antiviral state in human dendritic cells.

Abstract:

:Dendritic cells (DCs) play a central role in instructing antiviral immune responses. DCs, however, can become targeted by different viruses themselves. We recently demonstrated that human DCs can be productively infected with echoviruses (EVs), but not coxsackie B viruses (CVBs), both of which are RNA viruses belonging to the Enterovirus genus of the Picornaviridae family. We now show that phagocytosis of CVB-infected, type I interferon-deficient cells induces an antiviral state in human DCs. Uptake of infected cells increased the expression of the cytoplasmic RNA helicases retinoic acid-inducible gene I and melanoma differentiation-associated gene 5 as well as other interferon-stimulated genes and protected DCs against subsequent infection with EV9. These effects depended on recognition of viral RNA and could be mimicked by exposure to the synthetic double-stranded RNA analogue poly(I:C) but not other Toll-like receptor (TLR) ligands. Blocking endosomal acidification abrogated protection, suggesting a role for TLRs in the acquisition of an antiviral state in DCs. In conclusion, recognition of viral RNA rapidly induces an antiviral state in human DCs. This might provide a mechanism by which DCs protect themselves against viruses when attracted to an environment with ongoing infection.

journal_name

J Virol

journal_title

Journal of virology

authors

Kramer M,Schulte BM,Toonen LW,Barral PM,Fisher PB,Lanke KH,Galama JM,van Kuppeveld FJ,Adema GJ

doi

10.1128/JVI.02376-07

subject

Has Abstract

pub_date

2008-03-01 00:00:00

pages

2930-7

issue

6

eissn

0022-538X

issn

1098-5514

pii

JVI.02376-07

journal_volume

82

pub_type

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