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  • Borna disease virus nucleoprotein inhibits type I interferon induction through the interferon regulatory factor 7 pathway #MMPMID23939047
  • Song W; Kao W; Zhai A; Qian J; Li Y; Zhang Q; Zhao H; Hu Y; Li H; Zhang F
  • Biochem Biophys Res Commun 2013[Sep]; 438 (4): 619-23 PMID23939047garesp_yesshow ga
  • The expression of type I interferon (IFN) is one of the most potent innate defences against viral infection in higher vertebrates. Borna disease virus (BDV) establishes persistent, noncytolytic infections in animals and in cultured cells. Early studies have shown that the BDV phosphoprotein can inhibit the activation of type I IFN through the TBK1-IRF3 pathway. The function of the BDV nucleoprotein in the inhibition of IFN activity is not yet clear. In this study, we demonstrated IRF7 activation and increased IFN-alpha/beta expression in a BDV-persistently infected human oligodendroglia cell line following RNA interference-mediated BDV nucleoprotein silencing. Furthermore, we showed that BDV nucleoprotein prevented the nuclear localisation of IRF7 and inhibited endogenous IFN induction by poly(I:C), coxsackie virus B3 and IFN-beta. Our findings provide evidence for a previously undescribed mechanism by which the BDV nucleoprotein inhibits type I IFN expression by interfering with the IRF7 pathway.
  • |*Host-Pathogen Interactions[MESH]
  • |Borna Disease/*genetics/metabolism/virology[MESH]
  • |Borna disease virus/*physiology[MESH]
  • |Cell Line[MESH]
  • |Down-Regulation[MESH]
  • |Humans[MESH]
  • |Interferon Regulatory Factor-7/analysis/*metabolism[MESH]
  • |Interferon Type I/*genetics[MESH]
  • |Nucleoproteins/*metabolism[MESH]
  • |Signal Transduction[MESH]
  • |Viral Proteins/*metabolism[MESH]

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    619 4.438 2013