title: [Construction and identification of a recombinant PRRSV expressing protective antigens of type O foot-and-mouth disease virus].
abstract: Using mutation PCR, we cloned the target gene containing 421-480nt (141-160aa) and 598-639nt (200-213aa) of VP1 gene of foot and mouth disease virus (FMDV) into the deleted region (508-532aa) of Nsp2 gene of a highly pathogenic porcine reproductive and respiratory syndrome virus derived vaccine strain (HuN4-F112) that was used as vector. The recombinant cDNA was in vitro transcribed followed by transfection of BHK-21 cells for 36 h. Then, the supernatant of the cell culture was continuously seeded to monolayer of MARC-145 cells for recovery of the recombinant virus. CPE was obviously visible after a couple of passages in the seeded MARC-145, and the rescued virus (designated as rPRRSV-F112-O/VP1ep) was identified by Mlu I digestion, sequencing and immunofluorescence assay. Meanwhile, expression of inserted FMDV epitopes was also detected by indirect immunofluorescence assay with polyclonal antibodies against VP1 protein of FMDV. The analysis of biological characteristics shows that the titer of the rescued recombinant PRRSV (TCID50 = -log10(-6.75)/0.1 mL) was similar to its direct parental virus rHuN4-F112-delta508-532, but higher than rHuN4-F112.
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Tong
authors.forename: Yanzhao
authors.initials: Y
authors.lastname: Xu
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Jiang
authors.forename: Shanrui
authors.initials: S
authors.lastname: Zhang
authors.forename: Yaxin
authors.initials: Y
authors.lastname: Wang
authors.forename: Jianping
authors.initials: J
authors.lastname: Zhu
authors.forename: Lingxue
authors.initials: L
authors.lastname: Yu
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
authors.forename: Huanchun
authors.initials: H
authors.lastname: Chen
authors.forename: Guangzhi
authors.initials: G
authors.lastname: Tong
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000276:immunology; D001483:Base Sequence; D036022:Capsid Proteins / Q000276:immunology; D002460:Cell Line; D003546:Cysteine Endopeptidases / Q000235:genetics; D000939:Epitopes / Q000235:genetics*; D005536:Foot-and-Mouth Disease / Q000276:immunology / Q000517:prevention & control; D029544:Foot-and-Mouth Disease Virus / Q000235:genetics* / Q000276:immunology; D008969:Molecular Sequence Data; D009154:Mutation; D019316:Porcine respiratory and reproductive syndrome virus / Q000235:genetics* / Q000276:immunology; D011995:Recombination, Genetic; D013552:Swine; D014162:Transfection; D014613:Vaccines, Attenuated / Q000235:genetics / Q000276:immunology; D014759:Viral Envelope Proteins / Q000235:genetics / Q000276:immunology; D014765:Viral Vaccines / Q000235:genetics / Q000276:immunology
chemical_list: D000956:Antigens, Viral; D036022:Capsid Proteins; D000939:Epitopes; C442501:VP1 protein, Foot-and-mouth disease virus; D014613:Vaccines, Attenuated; D014759:Viral Envelope Proteins; D014765:Viral Vaccines; D003546:Cysteine Endopeptidases; C078306:nsP2 proteinase