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.