14-3-3ε acts as a proviral factor in highly pathogenic porcine reproductive and respiratory syndrome virus infection

Autor: Shengliang Cao, Fangyuan Cong, Min Tan, Guofei Ding, Jiaqi Liu, Li Li, Yuzhong Zhao, Sidang Liu, Yihong Xiao
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Veterinary Research, Vol 50, Iss 1, Pp 1-11 (2019)
Druh dokumentu: article
ISSN: 1297-9716
DOI: 10.1186/s13567-019-0636-0
Popis: Abstract The highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) emerged in 2006 in China and caused great economic losses for the swine industry because of the lack of an effective vaccine. 14-3-3 proteins are generating significant interest as potential drug targets by allowing the targeting of specific pathways to elicit therapeutic effects in human diseases. In a previous study, 14-3-3s were identified to interact with non-structural protein 2 (NSP2) of PRRSV. In the present study, the specific subtype 14-3-3ε was confirmed to interact with NSP2 and play a role in the replication of the HP-PRRSV TA-12 strain. Knockdown of 14-3-3ε in Marc-145 cells and porcine alveolar macrophages (PAMs) caused a significant decrease in TA-12 replication, while stable overexpression of 14-3-3ε caused a significant increase in the replication of TA-12 and low pathogenic PRRSV (LP-PRRSV) CH-1R. The 14-3-3 inhibitor difopein also decreased TA-12 and CH-1R replication in Marc-145 cells and PAMs. These findings are consistent with 14-3-3ε acting as a proviral factor and suggest that 14-3-3ε siRNA and difopein are therapeutic candidates against PRRSV infection.
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