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• W2049671504 endingPage "e1003610" @default.
• W2049671504 startingPage "e1003610" @default.
• W2049671504 abstract "Type I interferons (IFN) are important for antiviral responses. Melanoma differentiation-associated gene 5 (MDA-5) and retinoic acid-induced gene I (RIG-I) proteins detect cytosolic double-stranded RNA (dsRNA) or 5'-triphosphate (5'-ppp) RNA and mediate IFN production. Cytosolic 5'-ppp RNA and dsRNA are generated during viral RNA replication and transcription by viral RNA replicases [RNA-dependent RNA polymerases (RdRp)]. Here, we show that the Semliki Forest virus (SFV) RNA replicase can induce IFN-β independently of viral RNA replication and transcription. The SFV replicase converts host cell RNA into 5'-ppp dsRNA and induces IFN-β through the RIG-I and MDA-5 pathways. Inactivation of the SFV replicase RdRp activity prevents IFN-β induction. These IFN-inducing modified host cell RNAs are abundantly produced during both wild-type SFV and its non-pathogenic mutant infection. Furthermore, in contrast to the wild-type SFV replicase a non-pathogenic mutant replicase triggers increased IFN-β production, which leads to a shutdown of virus replication. These results suggest that host cells can restrict RNA virus replication by detecting the products of unspecific viral replicase RdRp activity." @default.
• W2049671504 created "2016-06-24" @default.
• W2049671504 creator A5001402841 @default.
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• W2049671504 creator A5012508232 @default.
• W2049671504 creator A5013384437 @default.
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• W2049671504 creator A5053674169 @default.
• W2049671504 creator A5053991345 @default.
• W2049671504 creator A5058385165 @default.
• W2049671504 creator A5087509869 @default.
• W2049671504 date "2013-09-05" @default.
• W2049671504 modified "2023-10-10" @default.
• W2049671504 title "RIG-I and MDA-5 Detection of Viral RNA-dependent RNA Polymerase Activity Restricts Positive-Strand RNA Virus Replication" @default.
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