本实验以 HIV- 1env与 h IL - 6基因在重组痘苗病毒中的共表达研究为目的 ,将痘苗病毒复制非必需区血凝素(HA )基因作为侧翼 ,把编码人白细胞介素 6 (h IL - 6 )的基因片段克隆到真核表达质粒 p J38env的下游 ,构建成含有 HIV- 1env与 h...本实验以 HIV- 1env与 h IL - 6基因在重组痘苗病毒中的共表达研究为目的 ,将痘苗病毒复制非必需区血凝素(HA )基因作为侧翼 ,把编码人白细胞介素 6 (h IL - 6 )的基因片段克隆到真核表达质粒 p J38env的下游 ,构建成含有 HIV- 1env与 h IL - 6两种外源基因的重组表达质粒 PJ38E- IL 6 ,经同源重组和血凝素阴性空斑筛选 ,获得了重组痘苗病毒 v J38E- IL 6。经间接免疫荧光试验、Dot- EL ISA和 Western bolt等检测证明 ,重组病毒能同时表达 env蛋白和 IL - 6蛋白 ,表达产物的分子量分别为 98k Da、2 6 k展开更多
目的探讨中国流行株 HIV- 1gag与 h IL - 2 /h IL - 6共表达重组核酸疫苗质粒的免疫效果。方法以核酸疫苗质粒 p IRES1neo为表达载体 ,构建重组核酸疫苗质粒 p IRES1- gag、p IRES1- gag- h IL- 2、p IRES1- gag- h IL- 6 ,通过间接免...目的探讨中国流行株 HIV- 1gag与 h IL - 2 /h IL - 6共表达重组核酸疫苗质粒的免疫效果。方法以核酸疫苗质粒 p IRES1neo为表达载体 ,构建重组核酸疫苗质粒 p IRES1- gag、p IRES1- gag- h IL- 2、p IRES1- gag- h IL- 6 ,通过间接免疫荧光试验、Dot- EL ISA检测 gag/h IL - 2 /h IL - 6基因的表达产物。另将此重组核酸疫苗质粒免疫 Balb/c小鼠 ,进行淋巴细胞转化试验、CD4+ 、CD8+ T淋巴细胞数量测定、细胞毒性 T淋巴细胞 (CTL )特异性杀伤作用检测及血清抗体检测 ,结果构建的重组质粒转染 BHK细胞后可表达目的基因 ,免疫小鼠后可有效地刺激淋巴细胞增殖、诱导特异性 CTL 反应 ,当和 h IL- 2 /h IL- 6共表达时免疫效果更加显著。讨论与 Gag蛋白共表达的 h IL- 2 /h IL- 6能够进一步增强免疫鼠的细胞免疫与体液免疫水平 ,构建的重组质粒为 HIV-展开更多
670-bp hIL-6 cDNA fragments have been amplified by polymerase chain reaction(PCR)using recombinant plasmid pBMIL-6A as templates and two synthetic oligonucleotides containing the opti-mired translation initiation sequ...670-bp hIL-6 cDNA fragments have been amplified by polymerase chain reaction(PCR)using recombinant plasmid pBMIL-6A as templates and two synthetic oligonucleotides containing the opti-mired translation initiation sequence/and restriction sites suitable for cloning as primers.The amplified IL-6cDNA fragments have then been recombined with a non-fusion expression baculovirus vector pVL1393.Theresultant recombinant plasmid pVL.IL-6 together with wtAcMNPV DNAs were transferred into culturedlepidopteran insect cells(Sf9)by calcium phosphate coprecipitation procedure.The recombinant baculovirus-es were formed by homologous recombination in vivo between pVL.IL-6 and wtAcMNPV DNAs,screenedfor plaque assay,and identified by means of dot blotting hybridization.The expressed rhIL-6 was secretedinto the culture medium,and its bioactivity was measured through half-maximum H-TdR incorporation intoIL-6-dependent cells 7TD1.As a result,the supernatant collected from recombinant baculovirus rAc.IL-6-infected Sf9 cells showed IL-6 activity of 10~6U/mL.The expression level of rhIL-6 of the supernatant deter-mined by IL-6 ELISA quantitation kit was 1 μg/mL.展开更多
文摘本实验以 HIV- 1env与 h IL - 6基因在重组痘苗病毒中的共表达研究为目的 ,将痘苗病毒复制非必需区血凝素(HA )基因作为侧翼 ,把编码人白细胞介素 6 (h IL - 6 )的基因片段克隆到真核表达质粒 p J38env的下游 ,构建成含有 HIV- 1env与 h IL - 6两种外源基因的重组表达质粒 PJ38E- IL 6 ,经同源重组和血凝素阴性空斑筛选 ,获得了重组痘苗病毒 v J38E- IL 6。经间接免疫荧光试验、Dot- EL ISA和 Western bolt等检测证明 ,重组病毒能同时表达 env蛋白和 IL - 6蛋白 ,表达产物的分子量分别为 98k Da、2 6 k
基金the National Natural Science Foundation of China
文摘670-bp hIL-6 cDNA fragments have been amplified by polymerase chain reaction(PCR)using recombinant plasmid pBMIL-6A as templates and two synthetic oligonucleotides containing the opti-mired translation initiation sequence/and restriction sites suitable for cloning as primers.The amplified IL-6cDNA fragments have then been recombined with a non-fusion expression baculovirus vector pVL1393.Theresultant recombinant plasmid pVL.IL-6 together with wtAcMNPV DNAs were transferred into culturedlepidopteran insect cells(Sf9)by calcium phosphate coprecipitation procedure.The recombinant baculovirus-es were formed by homologous recombination in vivo between pVL.IL-6 and wtAcMNPV DNAs,screenedfor plaque assay,and identified by means of dot blotting hybridization.The expressed rhIL-6 was secretedinto the culture medium,and its bioactivity was measured through half-maximum H-TdR incorporation intoIL-6-dependent cells 7TD1.As a result,the supernatant collected from recombinant baculovirus rAc.IL-6-infected Sf9 cells showed IL-6 activity of 10~6U/mL.The expression level of rhIL-6 of the supernatant deter-mined by IL-6 ELISA quantitation kit was 1 μg/mL.
