数字农科院2.0

Identification Of Protein Inhibitor Of Activated Stat 4, A Novel Host Interacting Partner That Involved In Bovine Viral Diarrhea Virus Growth

文献类型： 外文期刊

作者： Gong, XW; Chen, QW; Zheng, FY

作者机构：

关键词： Bvdv C Protein; Yeast Two-Hybrid; Pias4; Rna Interference; Co-Immunoprecipitation

期刊名称： VIROLOGY JOURNAL

ISSN： 1743-422X

年卷期： 2020 年 17 卷 1 期

页码：

收录情况： JCR（2021版）

摘要： Background Bovine viral diarrhea virus (BVDV) belongs to the Flaviviridae family and the pestivius virus group. BVDV is responsible for significant economic loss in cattle industry worldwide because of reducing reproductive performance, increasing incidence of other diseases and mortality among young stock. The core (C) protein of the Flaviviridae family member is involved in host antiviral immune response through activation of related signaling pathways that affect the viral replication. However, the influence of C protein-interaction partners in BVDV infections is poorly defined. Methods To explore C-protein-interacting partners, yeast two-hybrid was used to screen the interaction protein of C protein using bovine peripheral blood mononuclear cell (PBMC) cDNA library. The co-immunoprecipitation and confocal assays were manipulated to determine the interaction between potential partners and C protein. Knockdown and overexpression of the partner were used to examine whether the C-protein-interacting partner plays a role in BVDV proliferation and virulence. Meanwhile, qRT-PCR and western blot assays were used to investigate the effect of C protein and C-protein-interacting partner on the immune response of host cells. Results We identified protein inhibitor of activated STAT 4 (PIAS4) as a novel interacting partner of the BVDV C protein. Co-immunoprecipitation and confocal assays demonstrated a strong interaction between C protein and PIAS4. Silencing of PIAS4 with small interfering RNA suppressed C protein expression and BVDV growth, while overexpression of PISA4 increased C protein expression and BVDV growth. The overexpression of PIAS4 increased the cell apoptosis. Meanwhile, the expressions of STAT4, SOCS3, IFITM, IFN-alpha were negatively regulated by the expression of PIAS4. The expression of C protein suppressed the antiviral proteins expression, and the inhibition effect was enhanced by interaction of PIAS4 and C protein. These results highlighted the beneficial properties of cellular PIAS4 for BVDV protein expression and growth. Conclusions This study provides reliable clues for understanding the roles of PIAS4 in the regulation of BVDV growth.

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