目的阐明重组表达乙脑病毒非结构蛋白1(Non-structural protein 1,NS1)与包括乙脑病毒在内的多种蚊传黄病毒的抗原抗体反应,以及对乙脑病毒感染患者急性期血清标本的抗原抗体反应。方法本研究使用大肠杆菌原核表达载体(prokaryotic expr...目的阐明重组表达乙脑病毒非结构蛋白1(Non-structural protein 1,NS1)与包括乙脑病毒在内的多种蚊传黄病毒的抗原抗体反应,以及对乙脑病毒感染患者急性期血清标本的抗原抗体反应。方法本研究使用大肠杆菌原核表达载体(prokaryotic expression vector,pET)系统,重组表达乙脑病毒NS1基因。使用Western Blot实验方法检测重组表达蛋白质与多种,包括乙脑病毒在内的蚊传黄病毒抗体的反应,以及乙脑病毒感染患者急性期血清的抗原抗体反应。结果乙脑病毒(P3株)NS1基因表达产物以包涵体形式存在,经过变性和复性的表达产物在聚丙烯酰胺凝胶电泳(polyacrylamide gel electrophoresis,PAGE,简称变性胶)显示为单一条带,分子量约为45000。进一步的抗原抗体分析结果表明,表达产物与乙脑病毒(蚊虫分离株,脑炎患者分离株)多克隆或者单克隆抗体以及乙脑病毒感染病人急性期血清标本可以获得完全一致的抗原/抗体杂交反应。重组表达产物与蚊传黄病毒,如登革病毒和黄热病毒多克隆抗体之间抗原/抗体杂交反应为阴性,但与西尼罗病毒和墨累谷脑炎病毒多克隆抗体呈现抗原/抗体阳性杂交反应。结论本文成功获得乙脑病毒NS1蛋白的重组表达并分析了重组蛋白对多种蚊传黄病毒及乙脑病毒感染患者标本之间的抗原/抗体反应,研究结果对于阐明乙脑病毒NS1蛋白与蚊传黄病毒之间抗原抗体反应提供了重要的基础数据。本研究所获得重组表达蛋白为进一步研究乙脑病毒NS1蛋白质功能等提供了重要的物质基础。展开更多
In order to provide a rational research basis for clinical detection and genetic engineering vaccine, plasmid pET-28a (+) encoding both Porin gene PIA and PIB of Neisseria gonorrhoeae was constructed and a fusion prot...In order to provide a rational research basis for clinical detection and genetic engineering vaccine, plasmid pET-28a (+) encoding both Porin gene PIA and PIB of Neisseria gonorrhoeae was constructed and a fusion protein in E.coli DE3 expressed. The fragments of PIA and PIB gene of Neisseria gonorrhoeae were amplified and cloned into prokaryotic expression plasmid pET-28a(+) with double restriction endonuclease cut to construct recombinant pET-PIB-PIA. The recombinant was verified with restriction endonuclease and sequenced and transformed into E.coli DE3 to express the fusion protein PIB-PIA after induced with IPTG. The results showed PIA-PIB fusion DNA fragment was proved correct through sequencing. A 67 kD (1 kD=0 992 1 ku) fusion protein had been detected by SDS-PAGE. It was concluded that the fusion protein was successively expressed.展开更多
FUS1 is a novel candidate tumor suppressor gene identified in human chromosome 3p21.3. Its expression showed significantly reduction or even loss in lung cancer and other types of cancers. In order to further investig...FUS1 is a novel candidate tumor suppressor gene identified in human chromosome 3p21.3. Its expression showed significantly reduction or even loss in lung cancer and other types of cancers. In order to further investigate the biological function of FUS1 protein, FUS1 cDNA from MRC-5 cells was amplified by RT-PCR and cloned into prokaryotic expression vector pQE-30. The recombinant expression plasmids were transformed into M15 strain and grown at 20℃ or 37℃. SDS–PAGE analysis revealed that the accumulation of the recombinant protein FUS1 (rFUS1) in inclusion body forms reached maxium amount when induced with 0.5 mM IPTG for 5 h at 37℃. The inclusion bodies were solubilized in 2M urea and purified by a 6 ×His tagged affinity column under denaturing condition. The purified rFUS1 was identified by electrospray ionization-mass spectrometry (ESI-MS) and tested for purity by HPLC chromatography. The purified rFUS1 proteins were then used to immunize rabbits to obtain anti-human FUS1 polyclonal antibodies, which were suitable to detect both the recombinant exogenous FUS1 and the endogenous FUS1 from tissues and cells by western blot and immunohistochemistry, Available purified rFUS1 proteins and self-prepared polyclonal antibodies against FUS1 may provide effective tools for further studies on biological function and application of FUS1.展开更多
文摘目的阐明重组表达乙脑病毒非结构蛋白1(Non-structural protein 1,NS1)与包括乙脑病毒在内的多种蚊传黄病毒的抗原抗体反应,以及对乙脑病毒感染患者急性期血清标本的抗原抗体反应。方法本研究使用大肠杆菌原核表达载体(prokaryotic expression vector,pET)系统,重组表达乙脑病毒NS1基因。使用Western Blot实验方法检测重组表达蛋白质与多种,包括乙脑病毒在内的蚊传黄病毒抗体的反应,以及乙脑病毒感染患者急性期血清的抗原抗体反应。结果乙脑病毒(P3株)NS1基因表达产物以包涵体形式存在,经过变性和复性的表达产物在聚丙烯酰胺凝胶电泳(polyacrylamide gel electrophoresis,PAGE,简称变性胶)显示为单一条带,分子量约为45000。进一步的抗原抗体分析结果表明,表达产物与乙脑病毒(蚊虫分离株,脑炎患者分离株)多克隆或者单克隆抗体以及乙脑病毒感染病人急性期血清标本可以获得完全一致的抗原/抗体杂交反应。重组表达产物与蚊传黄病毒,如登革病毒和黄热病毒多克隆抗体之间抗原/抗体杂交反应为阴性,但与西尼罗病毒和墨累谷脑炎病毒多克隆抗体呈现抗原/抗体阳性杂交反应。结论本文成功获得乙脑病毒NS1蛋白的重组表达并分析了重组蛋白对多种蚊传黄病毒及乙脑病毒感染患者标本之间的抗原/抗体反应,研究结果对于阐明乙脑病毒NS1蛋白与蚊传黄病毒之间抗原抗体反应提供了重要的基础数据。本研究所获得重组表达蛋白为进一步研究乙脑病毒NS1蛋白质功能等提供了重要的物质基础。
文摘In order to provide a rational research basis for clinical detection and genetic engineering vaccine, plasmid pET-28a (+) encoding both Porin gene PIA and PIB of Neisseria gonorrhoeae was constructed and a fusion protein in E.coli DE3 expressed. The fragments of PIA and PIB gene of Neisseria gonorrhoeae were amplified and cloned into prokaryotic expression plasmid pET-28a(+) with double restriction endonuclease cut to construct recombinant pET-PIB-PIA. The recombinant was verified with restriction endonuclease and sequenced and transformed into E.coli DE3 to express the fusion protein PIB-PIA after induced with IPTG. The results showed PIA-PIB fusion DNA fragment was proved correct through sequencing. A 67 kD (1 kD=0 992 1 ku) fusion protein had been detected by SDS-PAGE. It was concluded that the fusion protein was successively expressed.
文摘FUS1 is a novel candidate tumor suppressor gene identified in human chromosome 3p21.3. Its expression showed significantly reduction or even loss in lung cancer and other types of cancers. In order to further investigate the biological function of FUS1 protein, FUS1 cDNA from MRC-5 cells was amplified by RT-PCR and cloned into prokaryotic expression vector pQE-30. The recombinant expression plasmids were transformed into M15 strain and grown at 20℃ or 37℃. SDS–PAGE analysis revealed that the accumulation of the recombinant protein FUS1 (rFUS1) in inclusion body forms reached maxium amount when induced with 0.5 mM IPTG for 5 h at 37℃. The inclusion bodies were solubilized in 2M urea and purified by a 6 ×His tagged affinity column under denaturing condition. The purified rFUS1 was identified by electrospray ionization-mass spectrometry (ESI-MS) and tested for purity by HPLC chromatography. The purified rFUS1 proteins were then used to immunize rabbits to obtain anti-human FUS1 polyclonal antibodies, which were suitable to detect both the recombinant exogenous FUS1 and the endogenous FUS1 from tissues and cells by western blot and immunohistochemistry, Available purified rFUS1 proteins and self-prepared polyclonal antibodies against FUS1 may provide effective tools for further studies on biological function and application of FUS1.
