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A robust transfection reagent for the transfection of CHO and HEK293 cells and production of recombinant proteins and lentiviral particles – PTG1
Author(s) -
Gonçalves Cristine,
Gross Fabian,
Guégan Philippe,
Cheradame Hervé,
Midou Patrick
Publication year - 2014
Publication title -
biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.144
H-Index - 84
eISSN - 1860-7314
pISSN - 1860-6768
DOI - 10.1002/biot.201400324
Subject(s) - transfection , hek 293 cells , chinese hamster ovary cell , bioproduction , microbiology and biotechnology , recombinant dna , cell culture , viral vector , gene delivery , chemistry , biology , biochemistry , gene , genetics
Bioproduction of recombinant proteins (r‐proteins) and recombinant lentiviral particles (r‐lentiviral particles) requires robust transfections consisting of efficient protocols that are easy to implement, with good reproducibility for a maximum production of proteins and lentiviral particles in a short time with low cytotoxicity. This study evaluates the capacity of histidinylated polyethyleneimine I (PTG1) to facilitate robust DNA transfection, with low cytotoxicity, of Chinese hamster ovary (CHO) and human embryonic kidney (HEK293T) cells for the production of r‐proteins and r‐lentiviral particles. We report that PTG1 transfection of cells in suspension with a plasmid DNA encoding enhanced green fluorescent protein leads to 72 and 97% of transfected CHO and HEK293T cells respectively, and does not significantly affect cell viability. PTG1 transfection of 100 mL of CHO‐S cell culture in suspension at a cell density of 2 × 10 6 cells /mL resulted in a high level of transfected cells and protein expression after transfection with 0.75 μg/mL plasmid DNA. Transfection with PTG1 is more efficient than LipofectAmine2000™, and gene expression is higher than observed with FreeStyle™ and JetPEI®. Tri‐transfection of HEK293T packaging cells leads to the production of a higher level of r‐lentiviral particles compared to the calcium phosphate method, and permits two harvests of viral particles within three days. These results show that PTG1 is a powerful new transfection reagent for cell lines frequently used for recombinant protein and lentiviral particle production. PTG1 could be used in protocols for bioproduction of therapeutic proteins such as antibodies for cancer treatments and viral vectors for gene therapy applications.