机构地区: 华南农业大学兽医学院农业部动物疫病防控重点开放实验室
出 处: 《中国预防兽医学报》 2010年第2期94-97,共4页
摘 要: 为构建血管瘤病变型J亚群禽白血病病毒E元件缺失突变体病毒,本研究利用融合PCR方法将E元件缺失,获得含有缺失性突变体病毒前病毒全基因组的重组质粒pSCAU-HN-△E。将该重组质粒纯化后转染DF-1细胞,并连续传代,最终获得缺失病毒rSCAU-HN-△E。该毒株感染的DF-1细胞可被ALV-J特异性单克隆抗体JE9所识别,并且体外增殖性能稳定。该缺失性病毒的获得为E元件功能的研究奠定了基础。 The Subgroup J avian leukosis virus (ALV-J) strain SCAU-HN06 isolated from commercial layer hens with spontaneous hemangiomas has a complete "E" element in 3'UTR. In order to rescue the E element-deleted virus, we constructed the recombinant plasmid pSCAU-HN-△ E that contained the whole ALV-J genome but with E element deleted. The plasmid was transfected into DF-1 cells and the rescued virus was identified by indirect fluorescence antibody test with ALV-J specific monoclonal antibody JE9. The recombinant virus was stable in cell culture during nine passages and had a titre up to 10^3.6 TCID50/0.2 mL.