比较免疫磁珠法与A蛋白亲和层析法纯化兔抗血清中的IgG  

Purification of IgG from Rabbit Sera by Immunomagnetic Beads and Protein A Affinity Chromatography

作　　者：郝华[1] 鄢庆枇[1,2] 邹文政[1,2] 纪勇[1,2] 

机构地区：[1]集美大学水产学院,福建厦门361021 [2]福建省高校水产科学技术与食品安全重点实验室,福建厦门361021

出　　处：《集美大学学报（自然科学版）》2011年第2期87-91,共5页Journal of Jimei University：Natural Science

基　　金："863"计划资助项目(2007AA09Z115);厦门市科技项目(3502Z20073019;3502Z20073020)

摘　　要：优化了免疫磁珠分离法纯化抗血清的实验条件,并与A蛋白亲和层析法比较纯化效果,以求得到一种简便、快速、高效的纯化IgG方法.结果表明:从5只新西兰兔获得210 mL试管凝集效价高达1∶5 120的兔抗鳗弧菌抗血清,磁珠与IgG结合10 min达到平衡,其最大结合量为0.227 mg/mL;免疫磁珠分离法与A蛋白亲和层析法得到的IgG纯度都很高,经过SDS-PAGE电泳都只得到25 ku和55 ku左右的两条带;免疫磁珠分离法得到的抗体ELISA效价高于A蛋白亲和层析法;免疫磁珠分离法反应所需时间(10 min)小于A蛋白亲和层析法所需的20 min,其得率(11.5 mg/mL)也高于A蛋白亲和层析法的10.25 mg/mL.Anti-sera were prepared from rabbit by injection of Vibrio anguillarum antigen,and then the IgG was purified from the anti-sera by the methods of immunomagnetic bead and protein A affinity chromatography.The results showed：210 mL anti-sera with an agglutination titer of 1∶5 120 were prepared from 5 New Zealand rabbits.The bonding of IgG and immunomagnetic beads reached equilibrium within 10 min,and the maximum bonding was 0.227 mg/mL.Purified IgG exhibited two bands in SDS-PAGE gel,the molecular weight of heavy chain and light chain of IgG were 55 ku and 25 ku,respectively.The IgG purified by immunomagnetic beads exhibited higher titer than that purified by protein A affinity chromatography.The process of immunomagnetic beads separation could be finished within 10 min which was shorter than that of protein A Sepharose affinity chromatography（20 min）.The IgG recovery efficacy of immunomagnetic beads method（11.5 mg/mL）was higher than that of protein A sepharose affinity chromatography（10.25 mg/mL）.The results indicated that immunomagnetic beads purified IgG conveniently,fast and efficiently,so they could be widely introduced to IgG purification.

关 键 词：免疫磁珠 A蛋白亲和层析 抗体纯化 

分 类 号：S941.42[农业科学—水产养殖]