| DOI | Resolve DOI: https://doi.org/10.1016/j.jbiotec.2017.06.009 |
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| Author | Search for: Poulain, A.1; Search for: Perret, S.1; Search for: Malenfant, F.1; Search for: Mullick, A.1; Search for: Massie, B.1; Search for: Durocher, Y.1 |
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| Affiliation | - National Research Council of Canada. Human Health Therapeutics
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| Format | Text, Article |
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| Subject | CHO; cell pools; inducible expression system; methionine sulfoximine; polyethylenimine; recombinant proteins |
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| Abstract | To rapidly produce large amounts of recombinant proteins, the generation of stable Chinese Hamster Ovary (CHO) cell pools represents a useful alternative to large-scale transient gene expression (TGE). We have developed a cell line (CHOBRI/rcTA) allowing the inducible expression of recombinant proteins, based on the cumate gene switch. After the identification of optimal plasmid DNA topology (supercoiled vs linearized plasmid) for PEIpro™ mediated transfection and of optimal conditions for methionine sulfoximine (MSX) selection, we were able to generate CHOBRI/rcTA pools producing high levels of recombinant proteins. Volumetric productivities of up to 900mg/L were reproducibly achieved for a Fc fusion protein and up to 350mg/L for an antibody after 14days post-induction in non-optimized fed-batch cultures. In addition, we show that CHO pool volumetric productivities are not affected by a freeze-thaw cycle or following maintenance in culture for over one month in the presence of MSX. Finally, we demonstrate that volumetric protein production with the CR5 cumate-inducible promoter is three- to four-fold higher than with the human CMV or hybrid EF1α-HTLV constitutive promoters. These results suggest that the cumate-inducible CHOBRI/rcTA stable pool platform is a powerful and robust system for the rapid production of gram amounts of recombinant proteins. |
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| Publication date | 2017-06-15 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23002175 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | ac970221-3075-4921-9c1d-fb59b097f911 |
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| Record created | 2017-08-29 |
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| Record modified | 2020-03-16 |
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