PMID- 24634130 OWN - NLM STAT- MEDLINE DCOM- 20141222 LR - 20140317 IS - 1676-5680 (Electronic) IS - 1676-5680 (Linking) VI - 13 IP - 1 DP - 2014 Feb 20 TI - Construction and expression of a heterologous protein in Lactococcus lactis by using the nisin-controlled gene expression system: the case of the PRRSV ORF6 gene. PG - 1088-96 LID - 10.4238/2014.February.20.10 [doi] AB - The porcine reproductive and respiratory syndrome virus (PRRSV) continues to be a threat, exerting significant economic effects on the swine industry worldwide. However, none of the current commercially available vaccines can completely prevent respiratory infection, trans-placental transmission, pig-to-pig transmission of the virus, or maintain immune protection in sows. This study provides information on PRRSV and a review of available options for PRRS control strategies based on its pathogenic characteristics, immune properties, and biological characteristics. In this study, the nisin-controlled expression system of Lactococcus lactis was selected as a vector to express the ORF6 gene of PRRSV. Food-grade recombinant, L. lactis PNZ8149/NZ3900-M/PRRS, which contained the lactose operon, was successfully constructed. The molecular weight of the expressed recombinant protein was approximately 19 kDa. Furthermore, the recombinant protein was located on the surface of L. lactis and showed reactogenicity with the antibody against PRRSV. Results of this study are expected to lay a theoretical foundation for development of genetically engineered L. lactis mucosal vaccines and to provide information related to its immune activity and adjuvant effects. FAU - Wang, Z H AU - Wang ZH AD - Department of Animal and Veterinary Science, Chengdu Vocational College of Agricultural Science and Technology, WenJiang, Sichuan, China. FAU - Wang, Y L AU - Wang YL AD - Isotope Research Laboratory, College of Life and Basic Sciences, Sichuan Agricultural University, Xin Kang, Ya'an, Sichuan, China. FAU - Zeng, X Y AU - Zeng XY AD - Isotope Research Laboratory, College of Life and Basic Sciences, Sichuan Agricultural University, Xin Kang, Ya'an, Sichuan, China 363150834@qq.com. LA - eng PT - Journal Article DEP - 20140220 PL - Brazil TA - Genet Mol Res JT - Genetics and molecular research : GMR JID - 101169387 RN - 0 (Recombinant Proteins) RN - 1414-45-5 (Nisin) SB - IM MH - Animals MH - Cell Line MH - Gene Expression/*drug effects MH - *Genes, Viral MH - Genetic Vectors/genetics/metabolism MH - Lactococcus lactis/*genetics/metabolism MH - Nisin/*pharmacology MH - Porcine respiratory and reproductive syndrome virus/*genetics MH - Recombinant Proteins/genetics/metabolism MH - Swine/virology EDAT- 2014/03/19 06:00 MHDA- 2014/12/23 06:00 CRDT- 2014/03/18 06:00 PHST- 2014/03/18 06:00 [entrez] PHST- 2014/03/19 06:00 [pubmed] PHST- 2014/12/23 06:00 [medline] AID - gmr2985 [pii] AID - 10.4238/2014.February.20.10 [doi] PST - epublish SO - Genet Mol Res. 2014 Feb 20;13(1):1088-96. doi: 10.4238/2014.February.20.10.