Development and application of monoclonal antibody against IgM of silver prussian carp Carassius auratus gibelio
GUO Baoqin,WEI Chang*,WANG Yinan,LI Qiang
1.College of Marine and Biological Engineering,Yancheng Institute of Technology,Yancheng 224051,China;2.College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China
Abstract: In this study,immunoglobulin IgM from the serum of silver prussian carp Carassiusauratusgibelio was isolated and purified by ammonium sulfate salting out method combined with protein A affinity chromatography.SDS-PAGE analysis showed that the purified IgM mainly contained two protein bands with relative molecular mass of 82 000 and 25 000,respectively.Balb/c mice were immunized with purified IgM,and five anti-crucian carp IgM monoclonal antibodies,named as 8G1,7C6,8C2,8C5 and 5C2,were obtained by hybridoma technique.Isotype analyzing indicated that 8G1,8C2,8C5 and 5C2 belonged to IgG1 isotype,and 7C6 belonged to IgG2b isotype.Western blot results showed that the five monodonal antibody (MAb) strains specifically recognized IgM light chain molecule with relative molecular mass of 25 000.The indirect immunofluorescence showed that all the five monoclonal antibodies recognized the sIgM cell of silver prussian carp.In addition,the indirect ELISA method for detection of the anti-CyHV-2 serum antibody in sliver carp was established using the anti-IgM monoclonal antibody as primary antibody and AP-labeled sheep anti-mouse Ig as the secondary antibody.The results of condition optimization indicated that the candidate 8C5 is the optimal anti-IgM monoclonal antibody,and 1∶20 dilution of fish serum is the optimal concentration for ELISA detection.Results of this study provides an effective tool for future research on immune response of silver prussian carp and an effective method for the evaluation of immune effect of vaccination.
郭宝琴, 魏畅, 王轶南, 李强. 异育银鲫IgM单克隆抗体的制备及其应用[J]. 大连海洋大学学报, 2022, 37(3): 450-456.
GUO Baoqin, WEI Chang, WANG Yinan, LI Qiang. Development and application of monoclonal antibody against IgM of silver prussian carp Carassius auratus gibelio. Journal of Dalian Ocean University, 2022, 37(3): 450-456.