Enhanced antibody production following intermediate addition based on flux analysis in mammalian cell continuous culture

  • Takeshi Omasa
  • Keisuke Furuichi
  • Tomoya Iemura
  • Yoshio Katakura
  • Michimasa Kishimoto
  • Ken-ichi Suga
Original Paper

Abstract

Generally, mammalian cells utilize glucose and glutamine as primary energy sources. To investigate the effect of energy sources on metabolic fluxes and antibody production, glucose- or glutamine-limited serum-free continuous culture of hybridoma 3A21 cells, which produce anti-ribonuclease A antibody, was carried out. The cell volume and dry cell weight were evaluated under various steady-state conditions. The specific consumption and production rates were evaluated on the basis of dry cell weight. On the basis of these results, the fluxes of the metabolic pathway were calculated. It was found that increasing the specific growth rate causes the specific ATP and antibody production rates to decrease. The fluxes between malate and pyruvate also decreased with the increase in specific growth rate. To increase the ATP production rate under steady-state conditions by the enhancement of fluxes between malate and pyruvate, the reduced metabolic fluxes were increased by an intermediate (pyruvate, malate, and citrate) addition. As a result, higher specific ATP and antibody production rates were achieved following the intermediate addition at a constant dilution rate.

Keywords

Mammalian cell Metabolic engineering Antibody production Flux Energy metabolism 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Takeshi Omasa
    • 1
  • Keisuke Furuichi
    • 1
    • 3
  • Tomoya Iemura
    • 1
    • 4
  • Yoshio Katakura
    • 1
  • Michimasa Kishimoto
    • 2
  • Ken-ichi Suga
    • 1
  1. 1.Department of Biotechnology, Graduate School of EngineeringOsaka UniversitySuitaJapan
  2. 2.Department of Chemistry and Materials TechnologyKyoto Institute of TechnologyKyotoJapan
  3. 3.Meiji Dairies CorporationOdawaraJapan
  4. 4.Kirin Brewery CompanyTokyoJapan

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