孕马尿中雌酮硫酸钠单克隆抗体的研制

Preparation of Monoclonal Antibody of Sodium Estrone Sulfate from Pregnant Mare's Urine

目的建立雌酮硫酸钠(ESS)单克隆抗体的制备方法。方法以ESS为抗原免疫Balb/c小鼠,筛选小鼠免疫方法,并通过方阵滴定法确定间接酶联免疫吸附测定(ELISA)方法;再以杂交瘤抗体技术获得抗ESS单克隆抗体细胞株。结果 ESS抗原5次以初次免疫200μg,加强免疫100μg的免疫剂量多点注射小鼠背部皮下免疫为小鼠最佳免疫方法;确定10μg·L-1为抗原包被浓度,1∶2 000的一抗血清稀释倍数;细胞融合率达90.2%,ELISA法筛选阳性率为4.4%,并筛选得到两株特异性较好的细胞株2C8和8A7。结论该研究筛选建立了ESS小鼠免疫方法及灵敏度高、特异性好的间接ELISA筛选体系,可用于ESS单克隆抗体的制备及检测,且建立了ESS单克隆抗体制备方法。

Objective To establish a method to prepare anti-sodium estrone sulfate monoclonal antibody （ ESS-Mab） . Methods Balb/c mice were immunized by ESS. Immune methods were screened. The blood serum potencies were measured by indirect ELISA and the best consistence of antigen and the first antibody were confirmed with method of titration. Cell fusion was carried by using PEG method and McAb hybridoma was screened with the indirect ELISA. Results The best immunization method of mice was subcutaneously multi-point injection in mouse back with the dose of 200/100 μg ESS antigen five times. The fusion rate was 90. 2%. Hybridoma positive rate of ELISA screening was 4. 4%. Finally two cell lines 2C8 and 8A7 with good specificity and sensitivity were obtained. Conclusion The best immunization way is selected and indirect ELISA is set up effectively and reliably for screening and presenting ESS McAb. the hybridoma technique is able to prepare monoclonal antibody of anti-ESS successfully.