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Porcine epidemic diarrhea virus E protein suppresses RIG-I signaling-mediated interferon-β production.
- Source :
-
Veterinary Microbiology . Mar2021, Vol. 254, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • PEDV E protein inhibits the poly(I:C)-induced IFN-β and ISGs production. • PEDV E protein suppresses the expression of RIG-I signaling-associated molecules. • PEDV E interacts IRF3 and further interferes its nuclear translocation. • PEDV E protein acts as an IFN-β antagonist through blockage of the RIG-I/ IRF3 signaling. Porcine epidemic diarrhea virus (PEDV) encodes many multifunctional proteins that inhibit host innate immune response during virus infection. As one of important structural proteins, PEDV E protein has been found to block the production of type I interferon (IFN) in virus life cycle, but little is known about this process that E protein subverts host innate immune. Thus, in this present study, we initiated the construction of eukaryotic expression vectors to express PEDV E protein. Subsequently, cellular localization analysis was performed and the results showed that the majority of PEDV E protein distributed at cytoplasm and localized in endoplasmic reticulum (ER). Over-expression of PEDV E protein significantly inhibited poly(I:C)-induced IFN-β and IFN-stimulated genes (ISGs) productions. We also found that PEDV E protein remarkably suppressed the protein expression of RIG-I signaling-associated molecules, but all their corresponding mRNA levels remained unaffected and unchanged. Furthermore, PEDV E protein obviously interfered with the translocation of IRF3 from cytoplasm to nucleus through direct interaction with IRF3, which is crucial for the IFN-β production induced by poly(I:C). Taken together, our results suggested that PEDV E protein acts as an IFN-β antagonist through suppression of the RIG-I-mediated signaling. This study will pave the way for the further investigation into the molecular mechanisms by which PEDV E protein evades host innate immune response. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03781135
- Volume :
- 254
- Database :
- Academic Search Index
- Journal :
- Veterinary Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 149125791
- Full Text :
- https://doi.org/10.1016/j.vetmic.2021.108994