Comparative metabolic analysis of CHO cell clones obtained through cell engineering, for IgG productivity, growth and cell longevity

PloS One
Camila A Wilkens, Ziomara P Gerdtzen

Abstract

Cell engineering has been used to improve animal cells' central carbon metabolism. Due to the central carbon metabolism's inefficiency and limiting input of carbons into the TCA cycle, key reactions belonging to these pathways have been targeted to improve cultures' performance. Previous works have shown the positive effects of overexpressing PYC2, MDH II and fructose transporter. Since each of these modifications was performed in different cell lines and culture conditions, no comparisons between these modifications can be made. In this work we aim at contrasting the effect of each of the modifications by comparing pools of transfected IgG producing CHO cells cultivated in batch cultures. Results of the culture performance of engineered clones indicate that even though all studied clones had a more efficient metabolism, not all of them showed the expected improvement on cell proliferation and/or specific productivity. CHO cells overexpressing PYC2 were able to improve their exponential growth rate but IgG synthesis was decreased, MDH II overexpression lead to a reduction in cell growth and protein production, and cells transfected with the fructose transporter gene were able to increase cell density and reach the same volumetr...Continue Reading

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Citations

Nov 26, 2015·Journal of Biotechnology·Cécile ToussaintYves Durocher
Dec 13, 2016·Journal of Biotechnology·Eric KarengeraOlivier Henry
Jul 7, 2017·Biotechnology and Applied Biochemistry·Wu ZouMohamed Al-Rubeai
Apr 1, 2018·Biotechnology and Bioengineering·Fiona HartleyKarl Morten
Jan 30, 2018·Biotechnology Journal·Ricardo Valdés-Bango Curell, Niall Barron
Jan 31, 2019·Journal of Cellular Physiology·Muhammad AkramRida Zainab
May 9, 2019·Biotechnology Letters·N JiménezZ P Gerdtzen

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Methods Mentioned

BETA
ELISA
transfection
PCR

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