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CHO gene expression profiling in biopharmaceutical process analysis and design
Author(s) -
Schaub Jochen,
Clemens Christoph,
Schorn Peter,
Hildebrandt Tobias,
Rust Werner,
Mennerich Detlev,
Kaufmann Hitto,
Schulz Torsten W.
Publication year - 2009
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.22549
Subject(s) - biopharmaceutical , titer , gene expression profiling , computational biology , cell culture , gene expression , biology , gene , microbiology and biotechnology , chemistry , biochemistry , genetics , antibody
Increase in both productivity and product yields in biopharmaceutical process development with recombinant protein producing mammalian cells can be mainly attributed to the advancements in cell line development, media, and process optimization. Only recently, genome‐scale technologies enable a system‐level analysis to elucidate the complex biomolecular basis of protein production in mammalian cells promising an increased process understanding and the deduction of knowledge‐based approaches for further process optimization. Here, the use of gene expression profiling for the analysis of a low titer (LT) and high titer (HT) fed batch process using the same IgG producing CHO cell line was investigated. We found that gene expression (i) significantly differed in HT versus LT process conditions due to differences in applied chemically defined, serum‐free media, (ii) changed over the time course of the fed batch processes, and that (iii) both metabolic pathways and 14 biological functions such as cellular growth or cell death were affected. Furthermore, detailed analysis of metabolism in a standard process format revealed the potential use of transcriptomics for rational media design as is shown for the case of lipid metabolism where the product titer could be increased by about 20% based on a lipid modified basal medium. The results demonstrate that gene expression profiling can be an important tool for mammalian biopharmaceutical process analysis and optimization. Biotechnol. Bioeng. 2010; 105: 431–438. © 2009 Wiley Periodicals, Inc.