Virus Genes

, Volume 42, Issue 1, pp 76–81 | Cite as

Activation of NF-κB by nucleocapsid protein of the porcine reproductive and respiratory syndrome virus

  • Rui Luo
  • Liurong Fang
  • Yunbo Jiang
  • Hui Jin
  • Yanwei Wang
  • Dang Wang
  • Huanchun Chen
  • Shaobo Xiao


Nuclear factor kappa B (NF-κB) is a critical transcription factor in innate and adaptive immune response as well as cell proliferation and survival. Previous studies have demonstrated that porcine reproductive and respiratory syndrome virus (PRRSV) infection activated NF-κB pathways through IκB degradation in MARC-145 cells and alveolar macrophages. To evaluate the mechanisms behind this, we investigated the role of PRRSV structural proteins in the regulation of NF-κB. In this study, we screened the structural proteins of PRRSV by NF-κB DNA-binding assay and luciferase activity assay and demonstrated that PRRSV nucleocapsid (N) protein could activate NF-κB in MARC-145 cells. Furthermore, we revealed that the region between aa 30 and 73 of N protein was essential for its function in the activation of NF-κB. These results presented here provide a basis for understanding molecular mechanism of PRRSV infection and inflammation response.


Porcine reproductive and respiratory syndrome virus (PRRSV) NF-κB N protein 



This work was supported by the National Natural Sciences Foundation of China (31001054, 30800046) and the New Century Excellent Talent Project (NCET-07-0347).


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Rui Luo
    • 1
    • 2
  • Liurong Fang
    • 1
    • 2
  • Yunbo Jiang
    • 1
    • 2
  • Hui Jin
    • 1
    • 2
  • Yanwei Wang
    • 1
    • 2
  • Dang Wang
    • 1
    • 2
  • Huanchun Chen
    • 1
    • 2
  • Shaobo Xiao
    • 1
    • 2
  1. 1.State Key Laboratory of Agricultural MicrobiologyHuazhong Agricultural UniversityWuhanChina
  2. 2.Laboratory of Animal Virology, College of Veterinary MedicineHuazhong Agricultural UniversityWuhanChina

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