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Applied Biochemistry and Biotechnology

, Volume 184, Issue 1, pp 303–322 | Cite as

A BioDesign Approach to Obtain High Yields of Biosimilars by Anti-apoptotic Cell Engineering: a Case Study to Increase the Production Yield of Anti-TNF Alpha Producing Recombinant CHO Cells

  • Sultan Gulce IzEmail author
  • Muge Anil Inevi
  • Pelin Saglam Metiner
  • Duygu Ayyildiz Tamis
  • Nazli Kisbet
Article

Abstract

Recent developments in medical biotechnology have facilitated to enhance the production of monoclonal antibodies (mAbs) and recombinant proteins in mammalian cells. Human mAbs for clinical applications have focused on three areas, particularly cancer, immunological disorders, and infectious diseases. Tumor necrosis factor alpha (TNF-α), which has both proinflammatory and immunoregulatory functions, is an important target in biopharmaceutical industry. In this study, a humanized anti-TNF-α mAb producing stable CHO cell line which produces a biosimilar of Humira (adalimumab) was used. Adalimumab is a fully human anti-TNF mAb among the top-selling mAb products in recent years as a biosimilar. Products from mammalian cell bioprocesses are a derivative of cell viability and metabolism, which is mainly disrupted by cell death in bioreactors. Thus, different strategies are used to increase the product yield. Suppression of apoptosis, also called anti-apoptotic cell engineering, is the most remarkable strategy to enhance lifetime of cells for a longer production period. In fact, using anti-apoptotic cell engineering as a BioDesign approach was inspired by nature; nature gives prolonged life span to some cells like stem cells, tumor cells, and memory B and T cells, and researchers have been using this strategy for different purposes. In this study, as a biomimicry approach, anti-apoptotic cell engineering was used to increase the anti-TNF-α mAb production from the humanized anti-TNF-α mAb producing stable CHO cell line by Bcl-xL anti-apoptotic protein. It was shown that transient transfection of CHO cells by the Bcl-xL anti-apoptotic protein expressing plasmid prolonged the cell survival rate and protected cells from apoptosis. The transient expression of Bcl-xL using CHO cells enhanced the anti-TNF-α production. The production of anti-TNF-α in CHO cells was increased up to 215 mg/L with an increase of 160% after cells were transfected with Bcl-xL expressing plasmid with polyethylenimine (PEI) reagent at the ratio of 1:6 (DNA:PEI). In conclusion, the anti-apoptotic efficacy of the Bcl-xL expressing plasmid in humanized anti-TNF-α MAb producing stable CHO cells is compatible with curative effect for high efficiency recombinant protein production. Thus, this model can be used for large-scale production of biosimilars through transient Bcl-xL gene expression as a cost-effective method.

Keywords

Anti-apoptotic cell engineering Bcl-xL Chinese hamster ovary cells Polyethylenimine (PEI) Transient gene expression (TGE) 

Notes

Acknowledgements

This study has been partly funded by TUBITAK through 2209-A project number 1919B011402737 under the supervision of Sultan GULCE IZ, PhD.

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© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Department of Bioengineering, Faculty of EngineeringEge UniversityIzmirTurkey
  2. 2.Department of Biotechnology and BioengineeringIzmir Institute of TechnologyIzmirTurkey
  3. 3.Turgut Ilaclari A.SIstanbulTurkey
  4. 4.GlaxoSmithKlineIstanbulTurkey

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