Abstract
We describe a method for polyethyleneimine (PEI) mediated transient transfection of suspension-adapted Chinese hamster ovary (CHO-DG44) cells for protein expression applicable at scales from 2 mL to 2 L. The method involves transfection at a high cell density (5 × 106 cells/mL) by direct addition of plasmid DNA (pDNA) and PEI to the culture and subsequent incubation at 31 °C with agitation by orbital shaking. This method requires 0.3 mg/L of coding pDNA, 2.7 mg/L of nonspecific (filler) DNA and 15 mg/L of PEI. The production phase is performed at 31 °C in the presence of 0.25% N,N-dimethylacetamide (DMA). We also provide information on culture vessel options, recommended working volumes, and recommended shaking speeds for transfections at scales from 2 mL to 2 L.
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Rajendra, Y. (2018). PEI-Mediated Transient Gene Expression in CHO Cells. In: Hacker, D. (eds) Recombinant Protein Expression in Mammalian Cells. Methods in Molecular Biology, vol 1850. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-8730-6_3
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DOI: https://doi.org/10.1007/978-1-4939-8730-6_3
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