Quantitative Proteomic Analysis of Cellular Responses to a Designed Amino Acid Feed in a Monoclonal Antibody Producing Chinese Hamster Ovary Cell Line

Authors
Fatemeh Torkashvand 1
Fereidoun Mahboudi 1
Manouchehr Vossoughi 2
Elnaz Fatemi 1
Seyed Masoud Moosavi Basri 1
Behrouz Vaziri 1
1 Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
2 Department of Chemical and Petroleum Engineering, Biochemical and Bioenvironmental Research Center Sharif University of Technology, Tehran, Iran
10.29252/ibj.22.6.385
Abstract
Background: Chinese hamster ovary (CHO) cell line is considered as the most common cell line in the biopharmaceutical industry because of its capability in performing efficient post-translational modifications and producing the recombinant proteins, which are similar to natural human proteins. The optimization of the upstream process via different feed strategies has a great impact on the target molecule expression and yield. Methods: To determine and understand the molecular events beneath the feed effects on the CHO cell, a label-free quantitative proteomic analysis was applied. The proteome changes followed by the addition of a designed amino acid feed to the monoclonal antibody producing CHO cell line culture medium were investigated. Results: The glutathione synthesis, the negative regulation of the programmed cell death, proteasomal catabolic process, and the endosomal transport pathway were up-regulated in the group fed with a designed amino acid feed compared to the control group. Conclusion: Our findings could be helpful to identify new targets for metabolic engineering.
Keywords
CHO Cells
Glutathione
Monoclonal antibodies
Proteomics