| Literature DB >> 21411525 |
Stephane Daffis1, Helen M Lazear, Wen Jun Liu, Michelle Audsley, Michael Engle, Alexander A Khromykh, Michael S Diamond.
Abstract
The host determinants that contribute to attenuation of the naturally occurring nonpathogenic strain of West Nile virus (WNV), the Kunjin strain (WNV(KUN)), remain unknown. Here, we show that compared to a highly pathogenic North American strain, WNV(KUN) exhibited an enhanced sensitivity to the antiviral effects of type I interferon. Our studies establish that the virulence of WNV(KUN) can be restored in cells and mice deficient in specific interferon regulatory factors (IRFs) or the common type I interferon receptor. Thus, WNV(KUN) is attenuated primarily through its enhanced restriction by type I interferon- and IRF-3-dependent mechanisms.Entities:
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Year: 2011 PMID: 21411525 PMCID: PMC3094947 DOI: 10.1128/JVI.00232-11
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103