疏水性电荷诱导色谱分离抗HER2单克隆抗体

采用疏水性电荷诱导色谱（HCIC）新型生物分离方法，从CHO细胞培养液中高效分离抗HER2单克隆抗体（单抗）。选用典型HCIC介质MEP HyperCel，考察了细胞培养液中单抗稳定性，比较了不同pH下MEP HyperCel介质对抗HER2单抗的吸附性能，发现pH6～9范围内吸附容量均较高，酸性条件下吸附容量显著下降。进一步考察了抗HER2单抗的动态吸附载量，优化了上样和洗脱条件，确定了合适的分离条件，实现了细胞培养液中高效分离单抗，纯度达到94.6%，收率约0.1 mg·（ml料液）^-1。结果表明，HCIC从哺乳动物细胞培养液中分离单抗是切实可行的，为单抗分离提供了新思路。

Separation and purification of anti-HER2 monoclonal antibody with hydrophobic charge-induction chromatography

Hydrophobic charge-induction chromatography (HCIC) is a new technology for biomolecule separation. In the present work HCIC was used to separate monoclonal antibody (mAb) anti-HER2 from Chinese Hamster ovary (CHO) cell culture broth with typical HCIC resin, MEP HyperCel. The stability of anti-HER2 mAb in cell culture broth was investigated firstly, and the adsorption of anti-HER2 mAb onto MEP HyperCel at different pH was compared. The adsorption capacities were high at the range of pH 6-9, but decreased significantly under acidic condition. The dynamic binding capacity of anti-HER2 mAb was determined with a packed bed, and the loading and elution conditions were optimized. The suitable separation conditions were obtained, and the purity of mAb could reach 94.6% with the yield of 0.1 mg·(ml broth)^-1. It is feasible to separate mAb from mammalian cell culture broth with HCIC.