抗rhEPO单克隆抗体的制备及初步应用

目的 :研制抗人促红细胞生成素的特异性单克隆抗体 (mAb) ,对其生物学特性进行初步鉴定 ,并用于转基因羊乳中重组人促红细胞生成素 (rhEPO)的提纯。方法 :以自制的rhEPO粗品免疫BALB/c小鼠 ,制备抗rhEPO的mAb。以Westernblot和间接ELISA法 ,对所获mAb进行初步鉴定。以纯化的mAb同预活化的Sepharose 4B偶联 ,制得mAb亲和层析柱 ,并用于转基因羊乳中rhEPO的提纯。结果 :获得两株可分泌特异性抗rhEPO的mAb的杂交瘤细胞株 (1E7和 2E6 )。Ig亚类 (型 )的鉴定分别为IgG1和IgG2b ,轻链均为κ型。用Westernblot证实 ,获得的mAb可特异性地识别rhEPO。用自制的免疫亲和层析柱用于转基因羊乳中rhEPO的提纯 ,具有很好的吸附作用 ,回收率达 70 %。结论 :成功地获得两株可分泌特异性抗rhEPO的mAb的杂交瘤细胞。用自制的免疫亲和层析柱提纯转基因羊奶中的rhEPO具有较高的吸附效率

Preparation and preliminary application of monoclonal antibody against recombinant human erythropoietin

AIM: To prepare monoclonal antibody (mAb) against erythropoietin(EPO), characterize its biological properties and use it to purify the rhEPO from transgenic goat milk. METHODS: A crude rhEPO product was used as the antigen to immunize BALB/c mice for preparing mAbs against rhEPO. The mAbs were characterized by Western blot and indirect ELISA. Purified mAb 2E6 was coupled with pre-activated Sepharose 4B to prepare the immunoaffinity chromatography column for purifying the rhEPO from transgenic goat milk. RESULTS: Two hybridoma cell lines(1E7 and 2E6)were obtained. mAbs 1E7 and 2E6 were shown to be IgG1 and IgG2b respectively, and their light chains were both kappa. Western blot analysis confirmed that the two mAbs could bind to rhEPO. The immunoaffinity chromatography column could adsorb 70% of rhEPO in purifying the rhEPO from transgenic goat milk. CONCLUSION: Two hybridoma cell lines secreting anti-rhEPO mAbs were successfully established. The mAb-immunoaffinity chromatography column could be used to purify the rhEPO from transgenic goat milk.