A Single Dynamic Metabolic Model Can Describe mAb Producing CHO Cell Batch and Fed-Batch Cultures on Different Culture Media

PLoS One. 2015 Sep 2;10(9):e0136815. doi: 10.1371/journal.pone.0136815. eCollection 2015.

Abstract

CHO cell culture high productivity relies on optimized culture medium management under fed-batch or perfused chemostat strategies enabling high cell densities. In this work, a dynamic metabolic model for CHO cells was further developed, calibrated and challenged using datasets obtained under four different culture conditions, including two batch and two fed-batch cultures comparing two different culture media. The recombinant CHO-DXB11 cell line producing the EG2-hFc monoclonal antibody was studied. Quantification of extracellular substrates and metabolites concentration, viable cell density, monoclonal antibody concentration and intracellular concentration of metabolite intermediates of glycolysis, pentose-phosphate and TCA cycle, as well as of energetic nucleotides, were obtained for model calibration. Results suggest that a single model structure with a single set of kinetic parameter values is efficient at simulating viable cell behavior in all cases under study, estimating the time course of measured and non-measured intracellular and extracellular metabolites. Model simulations also allowed performing dynamic metabolic flux analysis, showing that the culture media and the fed-batch strategies tested had little impact on flux distribution. This work thus paves the way to an in silico platform allowing to assess the performance of different culture media and fed-batch strategies.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acids / metabolism
  • Animals
  • Antibodies, Monoclonal / metabolism*
  • Batch Cell Culture Techniques / methods*
  • Biotechnology / methods
  • CHO Cells / cytology
  • CHO Cells / metabolism*
  • Cricetulus
  • Culture Media / metabolism*
  • Energy Metabolism
  • Glycolysis
  • Metabolic Networks and Pathways*
  • Models, Biological

Substances

  • Amino Acids
  • Antibodies, Monoclonal
  • Culture Media

Grants and funding

This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Research Network Grant program, grant no. NETGP380070-08 [http://www.nserc-crsng.gc.ca/]; the Canada Research Chair program, grant no. 950-201896 [http://www.chairs-chaires.gc.ca/home-accueil-fra.aspx], and the Monoclonal Antibody Network (MabNet). The funders had no role in that research.