Advertisement

 

 

Type 2 BVDV N(pro) suppresses IFN-1 pathway signaling in bovine cells and augments BRSV replication.

Type 2 BVDV N(pro) suppresses IFN-1 pathway signaling in bovine cells and augments BRSV replication.
Author Information (click to view)

Alkheraif AA, Topliff CL, Reddy J, Massilamany C, Donis RO, Meyers G, Eskridge KM, Kelling CL,


Alkheraif AA, Topliff CL, Reddy J, Massilamany C, Donis RO, Meyers G, Eskridge KM, Kelling CL, (click to view)

Alkheraif AA, Topliff CL, Reddy J, Massilamany C, Donis RO, Meyers G, Eskridge KM, Kelling CL,

Advertisement

Virology 2017 04 19507() 123-134 pii S0042-6822(17)30122-8
Abstract

Bovine viral diarrhea virus (BVDV) infection induces immunosuppression and in conjunction with bovine respiratory syncytial virus (BRSV) contributes to the bovine respiratory disease complex. Bovine turbinate cells were single or co-infected with type 2 BVDV wild-type (BVDV2-wt), its dysfunctional N(pro) mutant (BVDV2-E), and/or BRSV. BVDV2-E significantly up-regulated PKR, IRF-7, TBK-1, IRF-3, and IFN-β mRNAs based on real-time Q-RT-PCR. BRSV-infected cells expressed significantly up-regulated PKR, IRF-3, IRF-7, and IFN-β mRNAs, whereas BVDV2-wt, but not BVDV2-E, abolished this up-regulation in co-infection. No significant differences were observed in MAVS, NF-κB, and PIN-1 mRNAs. A dual-luciferase reporter assay showed that BVDV2-wt significantly increased NF-κB activity compared to BVDV2-E, while BVDV2-E significantly increased IFN-β activity compared to BVDV2-wt. The BRSV titer and RNA levels significantly increased in cells co-infected with BRSV/BVDV2-wt compared to cells co-infected with BRSV/BVDV2-E or infected with BRSV alone. This data supports the synergistic action of BVDV2-wt and BRSV inhibition of IFN-1.

Submit a Comment

Your email address will not be published. Required fields are marked *

17 − 11 =

[ HIDE/SHOW ]