Enhanced recombinant protein production in CHO cell continuous cultures under growth-inhibiting conditions is associated with an arrested cell cycle in G1/G0 phase

Low temperature and sodium butyrate (NaBu) are two of the most used productivity-enhancing strategies in CHO cell cultures during biopharmaceutical manufacturing. While these two approaches alter the balance in the reciprocal relationship between cell growth and productivity, we do not fully underst...

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Published in:PloS one 2022-11, Vol.17 (11), p.e0277620-e0277620
Main Authors: Avello, Verónica, Torres, Mauro, Vergara, Mauricio, Berrios, Julio, Valdez-Cruz, Norma A, Acevedo, Cristian, Molina Sampayo, Maria, Dickson, Alan J, Altamirano, Claudia
Format: Article
Language:English
Subjects:
Biology and Life Sciences
Biopharmaceuticals
Bioprocessing
Biosynthesis
Cell culture
Cell cycle
Cell growth
Cell lines
Continuous culture
Deregulation
Gene expression
Genetic aspects
Glucose
Low temperature
Manufacturing
Methods
Molecular modelling
Pharmaceuticals
Physiological aspects
Productivity
Proteins
Recombinant proteins
Research and analysis methods
Sodium
Sodium butyrate
Supplements
Temperature effects
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Summary:Low temperature and sodium butyrate (NaBu) are two of the most used productivity-enhancing strategies in CHO cell cultures during biopharmaceutical manufacturing. While these two approaches alter the balance in the reciprocal relationship between cell growth and productivity, we do not fully understand their mechanisms of action beyond a gross cell growth inhibition. Here, we used continuous culture to evaluate the differential effect of low temperature and NaBu supplementation on CHO cell performance and gene expression profile. We found that an increase in cell-productivity under growth-inhibiting conditions was associated with the arrest of cells in the G1/G0 phase. A transcriptome analysis revealed that the molecular mechanisms by which low temperature and NaBu arrested cell cycle in G1/G0 differed from each other through the deregulation of different cell cycle checkpoints and regulators. The individual transcriptome changes in pattern observed in response to low temperature and NaBu were retained when these two strategies were combined, leading to an additive effect in arresting the cell cycle in G1/G0 phase. The findings presented here offer novel molecular insights about the cell cycle regulation during the CHO cell bioprocessing and its implications for increased recombinant protein production. This data provides a background for engineering productivity-enhanced CHO cell lines for continuous manufacturing.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0277620