To construct the bi-valent genetic engineering vaccine against pseudorabies virus（PRV）and porcine reproductive and respiratory syndrome virus（PRRSV）,the modified PRRSV ORF5 gene（ORF5M） and the VP22 gene of bovin...To construct the bi-valent genetic engineering vaccine against pseudorabies virus（PRV）and porcine reproductive and respiratory syndrome virus（PRRSV）,the modified PRRSV ORF5 gene（ORF5M） and the VP22 gene of bovine herpesvirus 1（BHV-1）,which encodes VP22 protein and has been demonstrated to exhibit the unusual protein transduction property,were inserted into a PRV universal transfer vector pIECMV by turns.A recombinant virus transfer vector pIECMV-VP22ORF5M possessing VP22-ORF5M fusion gene was generated.The recombinant virus transfer vector pIECMV-VP22ORF5M co-transfected the IBRS-2 cells with PRV TK-/gE-/LacZ+ genomic DNA digested by EcoRⅠusing liposome method.Based on homologous recombination,the recombinant virus was generated and then purified by the plaque assay and PCR amplification.After three rounds of plaque purification,the recombinant virus was further confirmed by PCR,Southern blot and Western blot.A recombinant PRV（rPRV）TK-/gE-/VP22GP5+ expressing VP22-GP5 fusion protein was constructed.The results of TCID50 tests showed that the insertion of the foreign genes had no influence on the propagation of rPRV in IBRS-2 or PK-15 cells.The construction of rPRV TK-/gE-/VP22GP5+ provides a basis for further study of bi-valent genetic engineering vaccines against PRRSV and PRV,and that this strategy may also be useful to develop more efficient genetic engineering vaccines against other pathogens.展开更多
利用蚀斑试验方法对牛疱疹病毒1型(BHV-1)和牛副流感病毒3型(BPIV-3)的混合病毒进行分离纯化及鉴定,为BHV-1、BPIV-3感染的诊断提供科学依据。将不同稀释度的BHV-1和BPIV-3混合病毒接种至牛肾原代细胞,加营养琼脂培养,产生蚀斑后扩增并R...利用蚀斑试验方法对牛疱疹病毒1型(BHV-1)和牛副流感病毒3型(BPIV-3)的混合病毒进行分离纯化及鉴定,为BHV-1、BPIV-3感染的诊断提供科学依据。将不同稀释度的BHV-1和BPIV-3混合病毒接种至牛肾原代细胞,加营养琼脂培养,产生蚀斑后扩增并RT-PCR鉴定。将纯化后毒液分别进行二次蚀斑纯化及鉴定。结果 BHV-1和BPIV-3混合病毒第6~7 d可产生明显蚀斑。鉴定阳性的BHV-1和BPIV-3进行二次蚀斑,鉴定结果均为阳性,且分离的两种病毒TCID_(50)测定结果为10^(-8.5)/0.1 m L、10^(-6.5)/0.1 m L。首次通过蚀斑试验,成功分离并得到了两株毒力较高且纯化的BHV-1和BPIV-3病毒株。展开更多
文摘To construct the bi-valent genetic engineering vaccine against pseudorabies virus（PRV）and porcine reproductive and respiratory syndrome virus（PRRSV）,the modified PRRSV ORF5 gene（ORF5M） and the VP22 gene of bovine herpesvirus 1（BHV-1）,which encodes VP22 protein and has been demonstrated to exhibit the unusual protein transduction property,were inserted into a PRV universal transfer vector pIECMV by turns.A recombinant virus transfer vector pIECMV-VP22ORF5M possessing VP22-ORF5M fusion gene was generated.The recombinant virus transfer vector pIECMV-VP22ORF5M co-transfected the IBRS-2 cells with PRV TK-/gE-/LacZ+ genomic DNA digested by EcoRⅠusing liposome method.Based on homologous recombination,the recombinant virus was generated and then purified by the plaque assay and PCR amplification.After three rounds of plaque purification,the recombinant virus was further confirmed by PCR,Southern blot and Western blot.A recombinant PRV（rPRV）TK-/gE-/VP22GP5+ expressing VP22-GP5 fusion protein was constructed.The results of TCID50 tests showed that the insertion of the foreign genes had no influence on the propagation of rPRV in IBRS-2 or PK-15 cells.The construction of rPRV TK-/gE-/VP22GP5+ provides a basis for further study of bi-valent genetic engineering vaccines against PRRSV and PRV,and that this strategy may also be useful to develop more efficient genetic engineering vaccines against other pathogens.
文摘利用蚀斑试验方法对牛疱疹病毒1型(BHV-1)和牛副流感病毒3型(BPIV-3)的混合病毒进行分离纯化及鉴定,为BHV-1、BPIV-3感染的诊断提供科学依据。将不同稀释度的BHV-1和BPIV-3混合病毒接种至牛肾原代细胞,加营养琼脂培养,产生蚀斑后扩增并RT-PCR鉴定。将纯化后毒液分别进行二次蚀斑纯化及鉴定。结果 BHV-1和BPIV-3混合病毒第6~7 d可产生明显蚀斑。鉴定阳性的BHV-1和BPIV-3进行二次蚀斑,鉴定结果均为阳性,且分离的两种病毒TCID_(50)测定结果为10^(-8.5)/0.1 m L、10^(-6.5)/0.1 m L。首次通过蚀斑试验,成功分离并得到了两株毒力较高且纯化的BHV-1和BPIV-3病毒株。
