Abstract:
:Chinese hamster ovary (CHO) cells in culture are known to consume large amounts of nutrients and divert most of them toward byproducts, some of which, including lactate and ammonia, are known to be toxic in nature. Glucose limitation strategies can successfully control lactate accumulation in fed-batch cultures yielding higher peak cell densities and titers. Interestingly, even in such optimized cultures, cell growth slows and eventually stops, indicating the emergence of other factors that negatively affect cell growth. In this study, we employed omics techniques to identify and quantify nine compounds that are intermediates or byproducts of amino acid metabolism, and accumulate in fed-batch cultures. Treatment with these compounds either individually or in a combined fashion resulted in partial or complete cell growth inhibition. Careful control of selected amino acid concentrations between one-half and one millimolar during the growth phase of fed-batch cultures reduced accumulation of the inhibitory metabolites and allowed for higher peak cell densities and increased productivity. Biotechnol. Bioeng. 2017;114: 1779-1790. © 2017 Wiley Periodicals, Inc.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Mulukutla BC,Kale J,Kalomeris T,Jacobs M,Hiller GWdoi
10.1002/bit.26313subject
Has Abstractpub_date
2017-08-01 00:00:00pages
1779-1790issue
8eissn
0006-3592issn
1097-0290journal_volume
114pub_type
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journal_title:Biotechnology and bioengineering
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