title: Production process reproducibility and product quality consistency of transient gene expression in HEK293 cells with anti-PD1 antibody as the model protein.
abstract: Demonstration of reproducibility and consistency of process and product quality is one of the most crucial issues in using transient gene expression (TGE) technology for biopharmaceutical development. In this study, we challenged the production consistency of TGE by expressing nine batches of recombinant IgG antibody in human embryonic kidney 293 cells to evaluate reproducibility including viable cell density, viability, apoptotic status, and antibody yield in cell culture supernatant. Product quality including isoelectric point, binding affinity, secondary structure, and thermal stability was assessed as well. In addition, major glycan forms of antibody from different batches of production were compared to demonstrate glycosylation consistency. Glycan compositions of the antibody harvested at different time periods were also measured to illustrate N-glycan distribution over the culture time. From the results, it has been demonstrated that different TGE batches are reproducible from lot to lot in overall cell growth, product yield, and product qualities including isoelectric point, binding affinity, secondary structure, and thermal stability. Furthermore, major N-glycan compositions are consistent among different TGE batches and conserved during cell culture time.
authors.affiliation: Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China.
authors.forename: Kai
authors.initials: K
authors.lastname: Ding
authors.affiliation: Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Han
authors.affiliation: Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China.
authors.forename: Huifang
authors.initials: H
authors.lastname: Zong
authors.affiliation: Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China.
authors.forename: Junsheng
authors.initials: J
authors.lastname: Chen
authors.affiliation: Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China. bhzhang@sjtu.edu.cn.
authors.forename: Baohong
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China. jianweiz@sjtu.edu.cn.|Jecho Laboratories, Inc., 7320 Executive Way, Frederick, MD, 21704, USA. jianweiz@sjtu.edu.cn.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Zhu
mesh_terms: D019149:Bioreactors; D002460:Cell Line; D004797:Enzyme-Linked Immunosorbent Assay; D015870:Gene Expression; D006031:Glycosylation; D057809:HEK293 Cells; D006801:Humans; D007074:Immunoglobulin G / Q000096:biosynthesis*; D011134:Polysaccharides / Q000737:chemistry; D017433:Protein Structure, Secondary; D011994:Recombinant Proteins / Q000096:biosynthesis* / Q000235:genetics; D015203:Reproducibility of Results; D014162:Transfection
chemical_list: D007074:Immunoglobulin G; D011134:Polysaccharides; D011994:Recombinant Proteins
keywords: Glycosylation conservation; Product quality consistency; Production process reproducibility; Transient gene expression