title: Both Nsp1β and Nsp11 are responsible for differential TNF-α production induced by porcine reproductive and respiratory syndrome virus strains with different pathogenicity in vitro.
abstract: Porcine reproductive and respiratory syndrome virus (PRRSV) has been recognized to be one of the most important pathogens severely affecting global swine industry. An increasingly number of studies have paid much attention to the diverse roles of its nonstructural proteins (Nsps) in regulating the innate immune response of host upon PRRSV infection. In the present study, we first discovered that highly pathogenic PRRSV (HP-PRRSV) and low pathogenic PRRSV (LP-PRRSV) infection exhibited a differential TNF-α expression in pulmonary alveolar macrophages (PAMs), showing that HP-PRRSV infection induces lower TNF-α production at protein level in PAMs, compared with LP-PRRSV. Next, HP-PRRSV was confirmed to strongly suppress TNF-α production by inhibiting ERK signaling pathway. Finally, both Nsp1β and Nsp11 were demonstrated to be responsible for the inhibitory effect on TNF-α production induced by HP-PRRSV and the differential TNF-α production in PAMs. These findings contribute to the understanding of the pathogenesis of the Chinese HP-PRRSV.
authors.affiliation: Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China.
authors.forename: Qing
authors.initials: Q
authors.lastname: He
authors.affiliation: Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China.
authors.forename: Xinna
authors.initials: X
authors.lastname: Ge
authors.affiliation: Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. Electronic address: guoxin@cau.edu.cn.
authors.forename: Xin
authors.initials: X
authors.lastname: Guo
authors.affiliation: Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. Electronic address: yanghanchun1@cau.edu.cn.
authors.forename: Hanchun
authors.initials: H
authors.lastname: Yang
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D054884:Host-Pathogen Interactions; D057131:Immune Evasion; D016676:Macrophages, Alveolar / Q000276:immunology* / Q000821:virology*; D019316:Porcine respiratory and reproductive syndrome virus / Q000276:immunology* / Q000472:pathogenicity; D034421:Sus scrofa; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors / Q000378:metabolism*; D017361:Viral Nonstructural Proteins / Q000378:metabolism*
chemical_list: D014409:Tumor Necrosis Factor-alpha; D017361:Viral Nonstructural Proteins
keywords: Extracellular signal regulated kinase (ERK); Nonstructural protein (Nsp); Porcine reproductive and respiratory syndrome virus (PRRSV); Pulmonary alveolar macrophages (PAMs); Tumor necrosis factor-α (TNF-α)