alexa Construction and Detection of Recombinant Adeno-Associated Virus Co- Expressing PRRSV GP5, M Proteins and shRNA
ISSN: 2161-0517

Virology & Mycology
Open Access

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Research Article

Construction and Detection of Recombinant Adeno-Associated Virus Co- Expressing PRRSV GP5, M Proteins and shRNA

Bin Yang*, Xi Lan and Yan Qiu

State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China

*Corresponding Author:
Yang B
State Key Laboratory of Veterinary Etiological Biology
Lanzhou Veterinary Research Institute
Chinese Academy of Agricultural Sciences
Lanzhou 730046, China
Tel: +86-13919137004
Fax: +86-931-8340977
E-mail: [email protected]

Received date: August 11, 2016; Accepted date: January 06, 2017; Published date: January 13, 2017

Citation: Yang B, Lan X, Qiu Y (2017) Construction and Detection of Recombinant Adeno-Associated Virus Co-Expressing PRRSV GP5, M Proteins and shRNA. Virol-mycol 6:160. doi:10.4172/2161-0517.1000160

Copyright: © 2017 Yang B, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Porcine reproductive and respiratory syndrome virus (PRRSV) is a severe threat to the swine industry and has caused heavy economic losses worldwide. The currently used inactivated and attenuated virus vaccines have several shortcomings, such as unsafety and low protection rate, so it is urgent to develop a new vaccine. To explore and develop a novel vaccine against PRRSV, a bi-functional recombinant adeno-associated virus, expressing ORF5 and ORF6 proteins as well as a short interfering RNA (shRNA) against ORF7, was constructed. The shRNA against ORF7 was inserted into the sequence forward of the U6 promoter of pAAV-U6-IRES-hrGFP, and ORF5 and ORF6 were cloned into the sequence after the CMV promoter. 293T cells that were co-transfected with this vector along with pAAV-RC and pHelper produced a recombinant adeno-associated virus. 293T cells transduced with this recombinant virus expressed GP5 and M proteins, and Marc145 cells transduced with this recombinant virus suppressed the replication of PRRSV. The infective titer of the reconstructed virus was 1.9 × 1010 v.gmL as measured by the dot blotting method, and GP5 and M proteins were detected by western blot. The successful construction of rAAV-shRNA-ORF5-6 paves the way for the development of novel bi-functional vaccines against PRRSV.

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