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- W1912102732 endingPage "1101" @default.
- W1912102732 startingPage "1094" @default.
- W1912102732 abstract "ABSTRACT Chinese Hamster Ovary (CHO) cells are widely used for the large‐scale production of recombinant biopharmaceuticals. However, attempts to express IGF‐1 (a mutated human Insulin‐like growth factor 1 Ea peptide (hIGF‐1Ea mut)) in CHO cells resulted in poor cell growth and low productivity (0.1–0.2 g/L). Human IGF‐1 variants negatively impacted CHO cell growth via the IGF‐1 receptor (IGF‐1R). Therefore knockout (KO) of the IGF‐1R gene in two different CHO cell lines as well as knockdown (KD) of IGF‐1R in one CHO cell line were performed. These cell line engineering approaches decreased significantly the hIGF‐1 mediated cell growth inhibition and increased productivity of both KO CHO cell lines as well as of the KD CHO cell line. A productivity increase of 10‐fold at pool level and sevenfold at clone level was achieved, resulting in a titer of 1.3 g/L. This data illustrate that cell line engineering approaches are powerful tools to improve the yields of recombinant proteins which are difficult to produce in CHO cells. Biotechnol. Bioeng. 2016;113: 1094–1101. © 2015 Wiley Periodicals, Inc." @default.
- W1912102732 created "2016-06-24" @default.
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- W1912102732 date "2016-01-18" @default.
- W1912102732 modified "2023-10-16" @default.
- W1912102732 title "Improving expression of recombinant human IGF-1 using IGF-1R knockout CHO cell lines" @default.
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- W1912102732 doi "https://doi.org/10.1002/bit.25877" @default.
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