| DOI | Resolve DOI: https://doi.org/10.1016/j.jbiotec.2008.04.006 |
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| Author | Search for: Jardin, B. A.1; Search for: Zhao, Y.; Search for: Selvaraj, M.; Search for: Montes, J.1; Search for: Tran, R.1; Search for: Prakash, S.; Search for: Elias, C. B. |
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| Affiliation | - National Research Council of Canada. NRC Biotechnology Research Institute
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| Format | Text, Article |
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| Subject | CMV promoter; BacMam baculovirus; hollow fiber (HBFR); factorial design; Sf9; Chinese hamster ovary (CHO-K1); HEK 293A cells; wave bioreactor; TFF, tangential flow filtration; human embryonic kidney cells (HEK); secreted alkaline phosphatase (SEAP); trichostatin; alkaline phosphatase; biotechnology; cell Line; cell; cytomegalovirus; gene expression; in vitro; kidney; phosphatase; protein; vitro |
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| Abstract | A BacMam baculovirus was designed in our laboratory to express the reporter protein secreted alkaline phosphatase (SEAP) driven by the immediate early promoter of human cytomegalovirus promoter (CMV). In vitro tests have been carried out using this recombinant baculovirus to study the secreted protein in two cell lines and under various culture conditions. The transductionswere carried out on two commonly used mammalian cell lines namely the human embryonic kidney (HEK 293A) and Chinese hamster ovary (CHO-K1). Initial studies clearly demonstrated that the transient expression of SEAP was at least 10-fold higher in the HEK 293 cells than the CHO cells under equivalent experimental conditions. Factorial design experiments were done to study the effect of different parameters such as cell density, MOI, and the histone deacetylase inhibitor, trichostatin A concentration. The multiplicity of infection (MOI) and the cell density were found to have the most impact on the process. The enhancer trichostatin A also showed some positive effect. The production of secreted protein in a batch reactor was studied using the Wave disposable bioreactor system. A semi-continuous perfusion process was developed to extend the period of gene expression in mammalian cells using a hollow fiber bioreactor system (HFBR). The growth of cells and viability in both systems was monitored by offline analyses of metabolites. The expression of recombinant protein could be maintained over an extended period of time up to 30 days in the HFBR. |
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| Publication date | 2008-04-17 |
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| In | |
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| Note | DA - 20080623IS - 0168-1656 (Print)LA - engPT - Journal ArticleSB - IM |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | 47825
NRCC 47825 |
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| NPARC number | 12400994 |
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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 | e4f6f7f0-0bb1-4da0-816e-0eb008a7b663 |
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| Record created | 2009-10-02 |
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| Record modified | 2020-04-15 |
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