中文摘要：

目的：制备抗炭疽保护性抗原15（protective antigen,PA15）单克隆抗体,初步建立双抗体夹心ELISA检测炭疽感染者血清中的保护性抗原。方法：以纯化的PA63蛋白为免疫原免疫小鼠,利用杂交瘤技术制备单克隆抗体,SDS-PAGE电泳检测抗体纯度,间接ELISA、Western blot、免疫沉淀（IP）和蛋白质谱分析单抗特异性,并建立双抗体夹心ELISA检测方法。结果：制备了2株抗PA15单克隆抗体,命名为3D7和8E9。SDS-PAGE电泳可见抗体的重链和轻链,间接ELISA、Western blot发现单抗3D7和8E9可与PA15、PA63特异性结合,IP和蛋白质谱分析发现单抗3D7可与PA83特异性结合,双抗体夹心ELISA方法检测炭疽感染血清中保护性抗原的最低检出浓度为16 ng/ml。结论：成功制备了抗PA15单克隆抗体,并建立了双抗体夹心ELISA方法检测炭疽感染血清中的保护性抗原。

英文摘要：

Objective：To produce monoclonal antibodies against Bacillus anthracis PA15,and preliminarily establish double antibody sandwich-ELISA to detect the protective antigen obtained from serum of patient infected with Bacillus anthracis.Methods：Purified PA63 proteins were performed as immunogen to immunize mice.Hybridoma technology was performed to produce monoclonal antibodies.Sodium dodecyl sulfate-polyacrylamide gel electrophoresis（SDS-PAGE） was performed to detect the purity of antibodies.Indirect ELISA,Western blot,immunoprecipitation（IP） and protein profiling were performed to analyze the specificity of monoclonal antibodies.Furthermore,double antibody sandwich-ELISA method was performed.Results：Two monoclonal antibodies against PA15were obtained,named 3D7 and 8E9.SDS-PAGE showed the heavy and light chains of antibodies.Indirect ELISA and Western blot detected that monoclonal antibodies 3D7 and 8E9 can specifically bind PA15 and PA63.IP and protein profiling analyses showed that monoclonal antibody 3D7 can specifically bind PA83.Double antibody sandwich-ELISA detected that the limited detectable concentration of protective antigen from serum infected with Bacillus anthracis was 16 ng/ml.Conclusion：We have successfully developed monoclonal antibody against PA15,and established double antibody sandwich-ELISA to detect anthrax infected serum protective antigen.