A Consensus Genome-scale Reconstruction of Chinese Hamster Ovary Cell Metabolism.

A Consensus Genome-scale Reconstruction of Chinese Hamster Ovary Cell Metabolism.
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DOI:
10.1016/j.cels.2016.10.020
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发表时间:
2016-11-23
期刊:
影响因子:
9.3
通讯作者:
Lewis NE
Lewis NE
中科院分区:
生物学1区
文献类型:
--
作者:
Hefzi H;Ang KS;Hanscho M;Bordbar A;Ruckerbauer D;Lakshmanan M;Orellana CA;Baycin-Hizal D;Huang Y;Ley D;Martinez VS;Kyriakopoulos S;Jiménez NE;Zielinski DC;Quek LE;Wulff T;Arnsdorf J;Li S;Lee JS;Paglia G;Loira N;Spahn PN;Pedersen LE;Gutierrez JM;King ZA;Lund AM;Nagarajan H;Thomas A;Abdel-Haleem AM;Zanghellini J;Kildegaard HF;Voldborg BG;Gerdtzen ZP;Betenbaugh MJ;Palsson BO;Andersen MR;Nielsen LK;Borth N;Lee DY;Lewis NE

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Chinese hamster ovary (CHO) cells dominate biotherapeutic protein production and are widely used in mammalian cell line engineering research. To elucidate metabolic bottlenecks in protein production and to guide cell engineering and bioprocess optimization, we reconstructed the metabolic pathways in CHO and associated them with >1,700 genes in the Cricetulus griseus genome. The genome-scale metabolic model based on this reconstruction, iCHO1766, and cell line-specific models for CHO-K1, CHO-S, and CHO-DG44 cells, provide the biochemical basis of growth and recombinant protein production. The models accurately predict growth phenotypes and known auxotrophies in CHO cells. With the models, we quantify the protein synthesis capacity of CHO cells and demonstrate that common bioprocess treatments, such as histone deacetylase inhibitors, inefficiently increase product yield. However, our simulations show the metabolic resources in CHO are >3 times more efficiently utilized for growth or recombinant protein synthesis following targeted efforts to engineer the CHO secretory pathway. This model will further accelerate CHO cell engineering and help optimize bioprocesses.
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