目的研究1997～1999年出生人群,接种重组乙型肝炎(乙肝)疫苗[Hepatitis B Vaccine Made by Recombinant Deoxyribonucleic Acid(DNA)Techniques in Chinese Hamster Ovary(CHO)Cell,HepB(CHO)]的免疫效果。方法将正定县1997～1999年出...目的研究1997～1999年出生人群,接种重组乙型肝炎(乙肝)疫苗[Hepatitis B Vaccine Made by Recombinant Deoxyribonucleic Acid(DNA)Techniques in Chinese Hamster Ovary(CHO)Cell,HepB(CHO)]的免疫效果。方法将正定县1997～1999年出生人群接种重组HepB(CHO)的三个乡作为研究现场,以户籍登记在册的全部儿童为研究对象,核实重组HepB(CHO)接种史,采集静脉血5ml,无菌分离血清,使用固相放射免疫试剂检测乙肝病毒表面抗原[Hepatitis B Virus(HBV)Surface Antigen,HBsAg]和抗乙肝病毒核心抗原抗体(Anti-HBV Core Antibody,Anti-HBc);抗乙肝病毒表面抗原抗体(Anti-HBV Surface Antibody,Anti-HBs)使用Abbott公司生产的微粒子酶免疫测定(Microparticle Enzyme Immunoassay,MEIA)试剂定量检测。结果免疫后10～12年的Anti-HBs阳性率分别为71.0%、72.1%、68.2%,平均70.3%;Anti-HBs的几何平均浓度(Geometric Mean Concentration,GMC)分别为197.9mIU/ml(毫国际单位/毫升)、296.0mIU/ml、158.0mIU/ml,平均207.9mIU/ml。HBsAg阳性率为0.50%,Anti-HBc阳性率为2.26%。结论重组HepB(CHO)免疫后10～12年效果良好。展开更多
To construct the recombinant expression functionally in Chinese hamster ovary cells in order vector for CD80-IgG fusion gene and to express it to be used as an effective method to eliminate the immune escape of leukem...To construct the recombinant expression functionally in Chinese hamster ovary cells in order vector for CD80-IgG fusion gene and to express it to be used as an effective method to eliminate the immune escape of leukemic cells, the cDNA encoding the signal and extracellular domains of murine CD80 was generated by PCR amplification from plasmid pcDNMB7 containing the full length cDNA of murine CD80 and those of murine IgG1, in which the Fc fragment was obtained through RT-PCR amplification from murine spleen cells. These two cDNAs were then cloned in tandem into eukaryotic expression vector pcDNA3.0 and the resultant recombinant plasmid pcDNA/CD80-IgG was then transfected to Chinese hamster ovary cells with liposome transfection reagent. The cell clones constitutively expressing CD80-IgG fusion protein were obtained by G418 screening. Western blotting and dot ELISA assay were used to detect the expression of the fusion protein in the supernatants of these cells. Meanwhile, the fusion protein expressed was then purified with affinity chromatography, and its biological activity was demonstrated by flow cytometry, MTr colorimetry and ELISA assay. The experimental resuits showed that these two inserts were successfully cloned into plasmid pcDNA3.0, and the highly purified fusion protein was obtained. This fusion protein was proved to be able to upregulate the density of CD80 on leukemic cells, deliberately promote the proliferative reactions of mouse allogenic lymphocytes and increase the killing activity against WEHI-3 cells from 49.7 % up to 84.6 %. In addition, this fusion protein could also enhance the IL-2 secretion from allogenic lymphocytes activated by tumorspecific antigens. It is concluded that the recombinant vector constructed can be functionally expressed in the mammalian cells, thus providing a solid foundation for the further investigation on the mechanism to eliminate the immune escape of leukemic cells in vivo.展开更多
目的比较成人接种20微克(g)重组乙型肝炎(乙肝)疫苗(中国仓鼠卵巢细胞)[Hepatitis B Vaccine(HepB)Made by Recombinant Deoxyribonucleic Acid(DNA)Techniquesin Chinese Hamster Ovary(CHO)Cell,HepB-CHO]和20g重组乙肝疫苗(酿酒酵母)...目的比较成人接种20微克(g)重组乙型肝炎(乙肝)疫苗(中国仓鼠卵巢细胞)[Hepatitis B Vaccine(HepB)Made by Recombinant Deoxyribonucleic Acid(DNA)Techniquesin Chinese Hamster Ovary(CHO)Cell,HepB-CHO]和20g重组乙肝疫苗(酿酒酵母)(HepB Made by Recombinant DNA Techniquesin Saccharomyces Cerevisiae Yeast,HepB-SCY)的抗体应答及其影响因素。方法在山东省章丘市选择研究现场,筛选出乙肝病毒表面抗原[Hepatitis B Virus(HBV)Surface Antigen,HBsAg]、抗乙肝病毒表面抗原抗体(Antibody to HBsAg,Anti-HBs)和抗乙肝病毒核心抗原抗体全阴性者作为研究对象,随机分为两组,按照0、l、6个月免疫程序分别接种20g HepB-SCY和20g HepB-CHO。所有研究对象进行问卷调查并采集静脉血,采用化学发光微粒子免疫分析法(Chemiluminescence Microparticle Imunoassay,CMIA)定量检测Anti-HBs。比较不同HepB初次免疫后的抗体应答率和抗体水平,采用多因素分析方法确定排除其他因素影响后,HepB种类对抗体应答的影响。结果 HepB-SCY和HepB-CHO分别接种2011人和2290人。HepB-SCY无应答[<l0毫国际单位/毫升(mIU/m1)]率、低应答[10mIU/ml～99mIU/ml]率、正常应答[100mIU/ml～999mIU/m1]率、高应答[≥1000mIU/ml]率分别为14.22%、15.57%、29.09%和41.12%,HepB-CHO分别为9.35%、19.08%、33.97%和37.60%,两组四项指标间差异均有统计学意义(x2=5.44～23.11,P<0.01)。HepB-SCY组和HepB-CHO组Anti-HBs几何平均浓度(Geometric Mean Concentration,GMC)分别为270.39mIU/ml[95%可信区间(Confidence Interval,CI):233.33mIU/ml～3l3.32mIU/m1]和312.67mIU/ml(95%CI;278.28mIU/ml～351.32mIU/ml),差异无统计学意义(U=I.52,P=0.13)。多因素分析显示,排除性别、年龄、体重指数、吸烟史、饮酒史等因素影响后,无应答率与疫苗种类有关。结论成人接种20g HepB-SCY和20gHepB-CHO均可以获得较好的抗体应答,20g HepB-SCY无应答率略高于20g HepB-CHO。展开更多
文摘目的研究1997～1999年出生人群,接种重组乙型肝炎(乙肝)疫苗[Hepatitis B Vaccine Made by Recombinant Deoxyribonucleic Acid(DNA)Techniques in Chinese Hamster Ovary(CHO)Cell,HepB(CHO)]的免疫效果。方法将正定县1997～1999年出生人群接种重组HepB(CHO)的三个乡作为研究现场,以户籍登记在册的全部儿童为研究对象,核实重组HepB(CHO)接种史,采集静脉血5ml,无菌分离血清,使用固相放射免疫试剂检测乙肝病毒表面抗原[Hepatitis B Virus(HBV)Surface Antigen,HBsAg]和抗乙肝病毒核心抗原抗体(Anti-HBV Core Antibody,Anti-HBc);抗乙肝病毒表面抗原抗体(Anti-HBV Surface Antibody,Anti-HBs)使用Abbott公司生产的微粒子酶免疫测定(Microparticle Enzyme Immunoassay,MEIA)试剂定量检测。结果免疫后10～12年的Anti-HBs阳性率分别为71.0%、72.1%、68.2%,平均70.3%;Anti-HBs的几何平均浓度(Geometric Mean Concentration,GMC)分别为197.9mIU/ml(毫国际单位/毫升)、296.0mIU/ml、158.0mIU/ml,平均207.9mIU/ml。HBsAg阳性率为0.50%,Anti-HBc阳性率为2.26%。结论重组HepB(CHO)免疫后10～12年效果良好。
文摘To construct the recombinant expression functionally in Chinese hamster ovary cells in order vector for CD80-IgG fusion gene and to express it to be used as an effective method to eliminate the immune escape of leukemic cells, the cDNA encoding the signal and extracellular domains of murine CD80 was generated by PCR amplification from plasmid pcDNMB7 containing the full length cDNA of murine CD80 and those of murine IgG1, in which the Fc fragment was obtained through RT-PCR amplification from murine spleen cells. These two cDNAs were then cloned in tandem into eukaryotic expression vector pcDNA3.0 and the resultant recombinant plasmid pcDNA/CD80-IgG was then transfected to Chinese hamster ovary cells with liposome transfection reagent. The cell clones constitutively expressing CD80-IgG fusion protein were obtained by G418 screening. Western blotting and dot ELISA assay were used to detect the expression of the fusion protein in the supernatants of these cells. Meanwhile, the fusion protein expressed was then purified with affinity chromatography, and its biological activity was demonstrated by flow cytometry, MTr colorimetry and ELISA assay. The experimental resuits showed that these two inserts were successfully cloned into plasmid pcDNA3.0, and the highly purified fusion protein was obtained. This fusion protein was proved to be able to upregulate the density of CD80 on leukemic cells, deliberately promote the proliferative reactions of mouse allogenic lymphocytes and increase the killing activity against WEHI-3 cells from 49.7 % up to 84.6 %. In addition, this fusion protein could also enhance the IL-2 secretion from allogenic lymphocytes activated by tumorspecific antigens. It is concluded that the recombinant vector constructed can be functionally expressed in the mammalian cells, thus providing a solid foundation for the further investigation on the mechanism to eliminate the immune escape of leukemic cells in vivo.
文摘目的比较成人接种20微克(g)重组乙型肝炎(乙肝)疫苗(中国仓鼠卵巢细胞)[Hepatitis B Vaccine(HepB)Made by Recombinant Deoxyribonucleic Acid(DNA)Techniquesin Chinese Hamster Ovary(CHO)Cell,HepB-CHO]和20g重组乙肝疫苗(酿酒酵母)(HepB Made by Recombinant DNA Techniquesin Saccharomyces Cerevisiae Yeast,HepB-SCY)的抗体应答及其影响因素。方法在山东省章丘市选择研究现场,筛选出乙肝病毒表面抗原[Hepatitis B Virus(HBV)Surface Antigen,HBsAg]、抗乙肝病毒表面抗原抗体(Antibody to HBsAg,Anti-HBs)和抗乙肝病毒核心抗原抗体全阴性者作为研究对象,随机分为两组,按照0、l、6个月免疫程序分别接种20g HepB-SCY和20g HepB-CHO。所有研究对象进行问卷调查并采集静脉血,采用化学发光微粒子免疫分析法(Chemiluminescence Microparticle Imunoassay,CMIA)定量检测Anti-HBs。比较不同HepB初次免疫后的抗体应答率和抗体水平,采用多因素分析方法确定排除其他因素影响后,HepB种类对抗体应答的影响。结果 HepB-SCY和HepB-CHO分别接种2011人和2290人。HepB-SCY无应答[<l0毫国际单位/毫升(mIU/m1)]率、低应答[10mIU/ml～99mIU/ml]率、正常应答[100mIU/ml～999mIU/m1]率、高应答[≥1000mIU/ml]率分别为14.22%、15.57%、29.09%和41.12%,HepB-CHO分别为9.35%、19.08%、33.97%和37.60%,两组四项指标间差异均有统计学意义(x2=5.44～23.11,P<0.01)。HepB-SCY组和HepB-CHO组Anti-HBs几何平均浓度(Geometric Mean Concentration,GMC)分别为270.39mIU/ml[95%可信区间(Confidence Interval,CI):233.33mIU/ml～3l3.32mIU/m1]和312.67mIU/ml(95%CI;278.28mIU/ml～351.32mIU/ml),差异无统计学意义(U=I.52,P=0.13)。多因素分析显示,排除性别、年龄、体重指数、吸烟史、饮酒史等因素影响后,无应答率与疫苗种类有关。结论成人接种20g HepB-SCY和20gHepB-CHO均可以获得较好的抗体应答,20g HepB-SCY无应答率略高于20g HepB-CHO。
