用转染EBV DNA Bam HI K片段后稳定表达EBNA-1的K_4细胞作为靶细胞,检测50份鼻咽癌病人和38份健康对照者血清中的IgG/EBNA-1抗体;阳性率分别为100%和92%。前者的平均几何滴度为89.4,后者为18.3,前者约为后者的5倍。同一批被检血清经SP...用转染EBV DNA Bam HI K片段后稳定表达EBNA-1的K_4细胞作为靶细胞,检测50份鼻咽癌病人和38份健康对照者血清中的IgG/EBNA-1抗体;阳性率分别为100%和92%。前者的平均几何滴度为89.4,后者为18.3,前者约为后者的5倍。同一批被检血清经SPA吸收去除IgG竞争性抑制后,鼻咽癌病人的IgA/EBNA-1抗体阳性率达78%(GMT 20.9),健康人的IgA/EBNA-1抗体阳性率仅5.3%,效价亦很低(GMT 5.2)。表明IgA/EBNA-1抗体对鼻咽癌是比较特异的,可考虑作为鼻咽癌血清学诊断的指标之一。展开更多
To overexpress EBNA-1 in E.coli and generate the specific antibody,in this study,the antigenicity,epitope and hydrolysis of EBNA-1 were analyzed using the computer design software Biosun.Based on the prediction by com...To overexpress EBNA-1 in E.coli and generate the specific antibody,in this study,the antigenicity,epitope and hydrolysis of EBNA-1 were analyzed using the computer design software Biosun.Based on the prediction by computer analysis,the sequence encoding EBNA-1385-557 was amplified by PCR with the specific primers.The expression vector containing EBNA-1385-557 coding sequence was constructed.His-tagged EBNA-1385-557 was expressed in E.coli.The soluble recombinant protein was purified using Ni-NTA chromatography.The purified protein was used as antigens to immunize mice and screen the antibodies,which will serve as an important tool for further studies.展开更多
文摘用转染EBV DNA Bam HI K片段后稳定表达EBNA-1的K_4细胞作为靶细胞,检测50份鼻咽癌病人和38份健康对照者血清中的IgG/EBNA-1抗体;阳性率分别为100%和92%。前者的平均几何滴度为89.4,后者为18.3,前者约为后者的5倍。同一批被检血清经SPA吸收去除IgG竞争性抑制后,鼻咽癌病人的IgA/EBNA-1抗体阳性率达78%(GMT 20.9),健康人的IgA/EBNA-1抗体阳性率仅5.3%,效价亦很低(GMT 5.2)。表明IgA/EBNA-1抗体对鼻咽癌是比较特异的,可考虑作为鼻咽癌血清学诊断的指标之一。
基金supposed by National Basic Research Program of China(973 Program)(2006CB504305)Beijing Natural Science Foundation(No.7051006).
文摘To overexpress EBNA-1 in E.coli and generate the specific antibody,in this study,the antigenicity,epitope and hydrolysis of EBNA-1 were analyzed using the computer design software Biosun.Based on the prediction by computer analysis,the sequence encoding EBNA-1385-557 was amplified by PCR with the specific primers.The expression vector containing EBNA-1385-557 coding sequence was constructed.His-tagged EBNA-1385-557 was expressed in E.coli.The soluble recombinant protein was purified using Ni-NTA chromatography.The purified protein was used as antigens to immunize mice and screen the antibodies,which will serve as an important tool for further studies.