ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (3): 515-521.doi: 10.11843/j.issn.0366-6964.2017.03.015

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The Role of Chicken G3BP1 in the Formation of Stress Granules Induced by Newcastle Disease Virus Infection

ZHANG Pin1, SUN Ying-jie2, ZHENG Hang3, MAO Xu-ming2, QIU Xu-sheng2, TAN Lei2, MENG Chun-chun2, SONG Cui-ping2, LIAO Ying2, DING Chan2* , MA Wei-ming1*   

  1. (1. College of Animal Science and Technology, Shandong Agricultural University, Tai’an 271018, China; 2. Shanghai Veterinary Research Institute, CAAS, Shanghai 200241, China; 3. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China)
  • Received:2016-10-09 Online:2017-03-23 Published:2017-03-23

Abstract:

To investigate the mechanism of chicken stress granule (SG) formation and the role of Ras GTPase- activating protein-binding protein 1 (G3BP1) in SG formation and virus infection, immunofluorescence assay was utilized to evaluate G3BP1 accumulation in Newcastle disease virus (NDV) infected HeLa cells. GFP-tagged chicken G3BP1 and its 4 domains were transfected into HeLa cells, respectively, before exposed to various stressors. Finally, G3BP1 was transfected into cells before NDV infection. Western blot and TCID50 test were utilized to evaluate virus replication. The results showed that NDV infection induced endogenous G3BP1 accumulating as SGs. Transfection of exogenous chicken G3BP1 into either HeLa, DF-1 or CEF cells induced SGs in the presence or absence of environmental stress. Then the role of 4 domains of chicken G3BP1 in SG formation was evaluated. The results showed that RNA-binding domain was responsible for SG accumulation. In contrast, NTF2-like domain inhibit SG formation. Finally, it confirmed that G3BP1 overexpression enhanced NDV replication, indicating the pro-viral role of SG in NDV infection. These results demonstrated that chicken G3BP1 plays an important role in SG formation. Chicken SG promotes NDV replication.This study lay the foundation for the interactions between NDV and chicken cells.

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