Abstract
Batch and fed-batch cultures of a murine hybridomacell line (AFP-27) were performed in a stirred tankreactor to estimate the effect of feed rate on growthrate, macromolecular metabolism and antibodyproduction. Macromolecular composition was foundto change dynamically during batch culture ofhybridoma cells possibly due to active production ofDNA, RNA and protein during the exponential phase.Antibody synthesis is expected to compete with theproduction of cellular proteins from the amino acidpool. Therefore, it is necessary to examine therelationship between cell growth in terms of cellularmacromolecules and antibody production. In this study,we searched for an optimum feeding strategy bychanging the target specific growth rate in fed-batchculture to give higher antibody productivity whileexamining the macromolecular composition. Concentratedglucose (60 mM) and glutamine (20 mM) in DR medium(1:1 mixture of DMEM and RPMI) with additional aminoacids were fed continuously to the culture and thefeed rate was updated after every sampling to ensureexponential feeding (or approximately constantspecific growth rate). Specific antibody productionrate was found to be significantly increased in thefed-batch cultures at the near-zero specific growthrate in which the productions of cellular DNA, RNA,protein and polysaccharide were strictly limited byslow feeding of glucose, glutamine and other nutrients. Possible implications of these results are discussed.
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Jang, J.D., Barford, J.P. Effect of feed rate on growth rate and antibody production in the fed-batch culture of murine hybridoma cells. Cytotechnology 32, 229–242 (2000). https://doi.org/10.1023/A:1008169417980
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DOI: https://doi.org/10.1023/A:1008169417980