Abstract

Retinoic acid inducible gene I (RIG-I) is a pattern recognition receptor (PRR) responsible for detection of nucleic acids from pathogens in the cytoplasm of infected cells and induction of type I interferon (IFN). RIG-Ispecific pathogen associated molecular patterns (PAMPs) are characterized by RNA molecules with a 5'-triphosphate (5'-ppp) group and partial doublestranded composition. Although many RNA molecules capable of activating RIG-I have been described, the exact nature of viral RNAs that are responsible for triggering RIG-I activity during the course of an infection has not been extensively explored and the specificity of RIG-I for various viral RNA molecules remains largely unknown. By examining endogenous RIG-I/ RNA complexes in influenza virus- and Sendai virus-infected cells we were able to identify viral RNA molecules that specifically associated with RIG-I during infection. We showed that in Sendai virus-infected cells, RIG-I specifically and preferentially associated with the copy-back defective interfering (DI) particle RNA and not with the fulllength Sendai virus genome or Sendai virus encoded mRNAs. In influenza virus-infected cells RIG-I also preferentially associated with DI RNAs as well as with the shorter genomic segments.

Original languageEnglish
Pages (from-to)166-169
Number of pages4
JournalVirulence
Volume2
Issue number2
DOIs
StatePublished - 2011

Keywords

  • Influenza
  • PAMP
  • PRR
  • RIG-I
  • Sendai

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