title: Construction and immunogenicity of pseudotype baculovirus expressing GP5 and M protein of porcine reproductive and respiratory syndrome virus.
abstract: Baculovirus, which is extensively utilized as an excellent tool for production of recombinant protein in insect cells, has recently emerged as a novel and attractive gene delivery vehicle for mammalian cells. In the present study, a pseudotype baculovirus (with the glycoprotein of vesicular stomatitis virus (VSV-G) on the envelope) was used as vector to construct recombinant baculovirus coexpressing GP5 and M protein of porcine reproductive and respiratory syndrome virus (PRRSV), under the transcriptional control of two independent cytomegalovirus immediate early (CMV-IE) enhancer/promoters. The resultant recombinant baculovirus (BV-G-5m6) efficiently expressed PRRSV GP5 and M protein in mammalian cells. Intramuscular injection of BV-G-5m6 with various doses (1 x 10(8), 1 x 10(9), and 1 x 10(10)PFU/mouse) induced the production of PRRSV-specific neutralizing antibodies and gamma interferon (IFN-gamma) under dose-dependent pattern. Furthermore, BV-G-5m6 performed better immunogenicity, even at low dose (10(8)PFU), than DNA construct (pCI-5m6) encoding the same antigens, as demonstrated by significantly enhanced neutralizing antibodies and IFN-gamma production. These results indicate that pseudotype baculovirus-mediated gene delivery can be utilized as an alternative strategy to develop new generation of vaccine against PRRSV infection.
authors.affiliation: State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, Hubei, P.R.China.
authors.forename: Shengping
authors.initials: S
authors.lastname: Wang
authors.forename: Liurong
authors.initials: L
authors.lastname: Fang
authors.forename: Huiying
authors.initials: H
authors.lastname: Fan
authors.forename: Yunbo
authors.initials: Y
authors.lastname: Jiang
authors.forename: Yongfei
authors.initials: Y
authors.lastname: Pan
authors.forename: Rui
authors.initials: R
authors.lastname: Luo
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.forename: Huanchun
authors.initials: H
authors.lastname: Chen
authors.forename: Shaobo
authors.initials: S
authors.lastname: Xiao
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D016367:Baculoviridae / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D002460:Cell Line; D005260:Female; D007371:Interferon-gamma / Q000096:biosynthesis; D051379:Mice; D008807:Mice, Inbred BALB C; D009500:Neutralization Tests; D019318:Porcine Reproductive and Respiratory Syndrome / Q000517:prevention & control; D019316:Porcine respiratory and reproductive syndrome virus / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D011995:Recombination, Genetic; D013552:Swine; D014759:Viral Envelope Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D014763:Viral Matrix Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D014765:Viral Vaccines / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; C525999:M protein, porcine reproductive and respiratory syndrome virus; D014759:Viral Envelope Proteins; D014763:Viral Matrix Proteins; D014765:Viral Vaccines; C114789:glycoprotein 5, PRRSV; D007371:Interferon-gamma