A critical link between Toll-like receptor 3 and type II interferon signaling pathways in antiviral innate immunity.
Proc Natl Acad Sci U S A
; 105(51): 20446-51, 2008 Dec 23.
Article
em En
| MEDLINE
| ID: mdl-19074283
ABSTRACT
A conundrum of innate antiviral immunity is how nucleic acid-sensing Toll-like receptors (TLRs) and RIG-I/MDA5 receptors cooperate during virus infection. The conventional wisdom has been that the activation of these receptor pathways evokes type I IFN (IFN) responses. Here, we provide evidence for a critical role of a Toll-like receptor 3 (TLR3)-dependent type II IFN signaling pathway in antiviral innate immune response against Coxsackievirus group B serotype 3 (CVB3), a member of the positive-stranded RNA virus family picornaviridae and most prevalent virus associated with chronic dilated cardiomyopathy. TLR3-deficient mice show a vulnerability to CVB3, accompanied by acute myocarditis, whereas transgenic expression of TLR3 endows even type I IFN signal-deficient mice resistance to CVB3 and other types of viruses, provided that type II IFN signaling remains intact. Taken together, our results indicate a critical cooperation of the RIG-I/MDA5-type I IFN and the TLR3-type II IFN signaling axes for efficient innate antiviral immune responses.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Viroses
/
Transdução de Sinais
/
Interferon gama
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Receptor 3 Toll-Like
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Imunidade Inata
Limite:
Animals
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article