Transfection of HEK293-EBNA1 cells in suspension with linear PEI for production of recombinant proteins

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DOIResolve DOI: http://doi.org/10.1101/pdb.prot4977
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TypeArticle
Journal titleCold Spring Harbor Protocols
ISSN1940-3402
Volume3
Issue3
AbstractFast and efficient production of recombinant proteins (r-proteins) remains a major challenge for the academic and biopharmaceutical communities. Pure r-proteins are often required in large amounts (hundreds of milligrams to gram quantities) when being developed as biotherapeutics, or in smaller quantities (milligrams) for high-throughput screening campaigns and structural or functional studies. Mammalian cells are often preferred over prokaryotic systems when expressing cDNAs of mammalian origin due to their superior capability to conduct elaborate post-translational modifications. Large-scale transfection of mammalian cells is now establishing itself as a "must-have" technology in the scientific community, as it allows the production of milligram to gram quantities of r-proteins within a few days after cDNA cloning into the appropriate expression vector. Although calcium-mediated large-scale transfection is very effective, it is usually achieved in serum-containing medium under tightly controlled conditions that are difficult to achieve on a large scale. In contrast, polyethylenimine (PEI) is much easier to use: It binds to and precipitates DNA efficiently and the resulting DNA-PEI complexes are suitable for efficient transfection of mammalian cells. PEI has been used successfully on a large scale in serum-containing and serum-free cultures. In particular, the linear isoform of PEI is more effective for transfecting cells in suspension. This protocol describes the steps needed for successful transfection of HEK293 cells adapted to serum-supplemented or serum-free medium in suspension culture using linear PEI.
Publication date
PublisherCold Spring Harbor Laboratory Press
LanguageEnglish
AffiliationNRC Biotechnology Research Institute; National Research Council Canada
Peer reviewedYes
NRC number53209
NPARC number21268302
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Record identifier75e91dd3-a7b9-4bfc-ab0f-9a73595d61dd
Record created2013-06-17
Record modified2016-05-09
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