Production of glycoprotein therapeutics in Chinese hamster ovary (CHO) cells is limited by the cells' generic capacity for N-glycosylation, and production of glycoproteins with desirable homogeneous glycoforms remains a challenge. We conducted a comprehensive knockout screen of glycosyltransferase genes controlling N-glycosylation in CHO cells and constructed a design matrix that facilitates the generation of desired glycosylation, such as human-like α2,6-linked sialic acid capping. This engineering approach will aid the production of glycoproteins with improved properties and therapeutic potential.
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We would like to express our sincere gratitude to the SAFC Sigma team including K. Kayser and N. Sealover for their help with ZFN targeting constructs. We are also grateful to B. Palsson for help throughout this work and critical comments on the manuscript. We are grateful to M. Uhlen, L.E. Pedersen and B. Voldborg at the Novo Nordisk Foundation Center for Biosustainability, Danish Technical University, for RNA-seq analysis. This work was supported by the Novo Nordisk Foundation, Kirsten og Freddy Johansen Fonden, The Mizutani Foundation, A.P. Møller og Hustru Chastine Mc-Kinney Møllers Fond til Almene Formaal, Copenhagen University Excellence Programme for Interdisciplinary Research (CDO2016), the Danish National Research Foundation (DNRF107) and The Danish Councils for Strategic and Independent Research. All reagents and cell lines used in the study are available upon request for research purposes under a material transfer agreement.
A patent application has been filed on which some of the authors are listed as inventors.
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Yang, Z., Wang, S., Halim, A. et al. Engineered CHO cells for production of diverse, homogeneous glycoproteins. Nat Biotechnol 33, 842–844 (2015). https://doi.org/10.1038/nbt.3280
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