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Updated: Dec 21, 2025

A High-throughput Automated Platform for the Development of Manufacturing Cell Lines for Protein Therapeutics
Published on: September 22, 2011
High efficiency CHO cell display-based antibody maturation
Ruiqi Luo1,2, Yun Zhao1, Yingjun Fan1,2
1Key Laboratory for Protein and Peptide Pharmaceuticals, National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
Abstract:
Previously, we developed a CHO cell display-based antibody maturation procedure in which an antibody (or other protein) gene of interest was induced to mutate by activation-induced cytidine deaminase (AID) and then form a library by simply proliferating the CHO cells in culture. In this study, we further improved the efficiency of this maturation system by reengineering AID, and optimizing the nucleic acid sequence of the target antibody gene and AID gene as well as the protocol for AID gene transfection. These changes have increased both the mutation rate and the number of mutation type of antibody genes by more than 10 fold, and greatly improved the maturation efficiency of antibody/other proteins.
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