A sensitive, specific, noncompetitive, sandwich-type radioimmunoassayfor carcinoembryonic antigen (CEA) has been developed in our laboratoryl which canbe performed conveniently. The assay involves two monoclonal antib...A sensitive, specific, noncompetitive, sandwich-type radioimmunoassayfor carcinoembryonic antigen (CEA) has been developed in our laboratoryl which canbe performed conveniently. The assay involves two monoclonal antibodies, selectedfor high affinity and specificity and also for reaction against antigenic sites on CEAthat are distal from each other. One of these antibodies was labeled with 1251 andthe other was conjugated covalently to biotin. Polystyrene tubes were conjugatedcovalently to avidin. These tubes represent a rapid, simple method for separating theCEA-bound antibody from the free antibody. The biotin-antibody-CEA-"’I-labeledantibody complexes bind to the tubes and CEA concentration is directly related tocounts per minute. This assay can detect the CEA at a concentration of 0.22 ig/L inserum.展开更多
采用包被管分离技术,利用两株抗PAP单克隆抗体,双位点夹心免疫放射分析方法测量人血清中PAP含量。结果表明,该试剂盒分析灵敏度为0.1μg/L;批内变异系数为(8.8~9.6)%;批间变异系数为(7.7~12.3)%;回收率为(96.3~105.0)%;标准曲线...采用包被管分离技术,利用两株抗PAP单克隆抗体,双位点夹心免疫放射分析方法测量人血清中PAP含量。结果表明,该试剂盒分析灵敏度为0.1μg/L;批内变异系数为(8.8~9.6)%;批间变异系数为(7.7~12.3)%;回收率为(96.3~105.0)%;标准曲线范围为2.5~200.0μg/L。与DPC公司CAC PAP IR-MA试剂盒进行方法学比较,相关系数r=0.909。展开更多
文摘A sensitive, specific, noncompetitive, sandwich-type radioimmunoassayfor carcinoembryonic antigen (CEA) has been developed in our laboratoryl which canbe performed conveniently. The assay involves two monoclonal antibodies, selectedfor high affinity and specificity and also for reaction against antigenic sites on CEAthat are distal from each other. One of these antibodies was labeled with 1251 andthe other was conjugated covalently to biotin. Polystyrene tubes were conjugatedcovalently to avidin. These tubes represent a rapid, simple method for separating theCEA-bound antibody from the free antibody. The biotin-antibody-CEA-"’I-labeledantibody complexes bind to the tubes and CEA concentration is directly related tocounts per minute. This assay can detect the CEA at a concentration of 0.22 ig/L inserum.
文摘采用包被管分离技术,利用两株抗PAP单克隆抗体,双位点夹心免疫放射分析方法测量人血清中PAP含量。结果表明,该试剂盒分析灵敏度为0.1μg/L;批内变异系数为(8.8~9.6)%;批间变异系数为(7.7~12.3)%;回收率为(96.3~105.0)%;标准曲线范围为2.5~200.0μg/L。与DPC公司CAC PAP IR-MA试剂盒进行方法学比较,相关系数r=0.909。