Overexpression of G6PDH does not affect the behavior of HEK-293 clones stably expressing interferon-α2b

AIMS Bioengineering

Sachin Gupte¹  Yves Durocher²  Mario Jolicoeur³  Jingkui Chen³  Iness Hammami³  Edwige Arnold³ 

[1] Department of Pharmacology, New York Medical College, Valhalla, NY 10595;National Research Council, Montréal, Québec, Canada;Research Laboratory in Applied Metabolic Engineering, Department of Chemical Engineering, École Polytechnique de Montréal, Montréal, Québec, Canada;

关键词: G6PDH overexpression;    Pentose Phosphate Pathway;    HEK-293;    metabolomics;    cell energetics;    Pyruvate Carboxylase;   

DOI  :  10.3934/bioeng.2016.3.319

来源: DOAJ

【 摘 要 】

HEK293 cells are gaining in interest for the production of recombinant proteins. However, further understanding and engineering of cell metabolism are still needed to improve protein titers. The importance of G6PDH has already been studied regarding redox balance, and a correlation has recently been established between the oxidative pentose phosphate pathway (PPP) and antibody peak production. In this work, HEK293 cells stably expressing interferon-α2b, a parental clone, and a further engineered clone expressing the cytosolic yeast pyruvate-carboxylase (PYC) were transiently transfected to overexpress glucose-6-phosphate dehydrogenase (G6PDH) and increase fluxes through the PPP. The aim of the study was thus to evaluate the effect of overexpressing G6PDH on the “pull” effect brought by the PYC phenotype. Results indicate that the cell metabolism is, however, highly robust, showing a highly regulated PPP damping the potential effects of overexpressing G6PDH. A metabolomic study also clearly demonstrates, by metabolites profiling, that the PYC clone has a highly robust and more efficient metabolic efficiency, compared to its parental clone.

【 授权许可】

Unknown