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Related Experiment Videos

Metabolically optimised BHK cell fed-batch cultures.

H J Cruz1, J L Moreira, M J Carrondo

  • 1Instituto de Biologia Experimental e Tecnológica/Instituto de Tecnologia Química e Biológica, Apartado 12, P-2780, Oeiras, Portugal.

Journal of Biotechnology
|July 26, 2000
PubMed
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Metabolic confinement of BHK21 cells in fed-batch cultures enhances antibody/cytokine fusion protein production. This optimization strategy improves cell growth, viability, and significantly increases product yield for tumor-targeted therapies.

Area of Science:

  • Biotechnology
  • Cell Culture Optimization
  • Biopharmaceutical Production

Background:

  • BHK21 cells are utilized for producing fusion proteins with therapeutic potential.
  • Previous studies indicated metabolic pathway shifts at low nutrient concentrations.
  • Optimizing fed-batch cultures is crucial for enhancing biopharmaceutical yields.

Purpose of the Study:

  • To optimize fed-batch culture of BHK21 cells for antibody/cytokine fusion protein production.
  • To investigate the effects of metabolic confinement on cell growth, viability, and product formation.
  • To reduce toxic metabolite accumulation during cell culture.

Main Methods:

  • Implementing metabolic confinement by maintaining low glucose (0.3 mM) and glutamine (0.2 mM) concentrations.

Related Experiment Videos

  • Utilizing off-line measurements for estimating nutrient consumption and growth rates.
  • Comparing fed-batch culture with metabolic confinement against standard batch culture.

    • Main Results:

    • Achieved higher cell growth rate (0.020 vs. 0.016 h⁻¹) and improved cell viability.
    • Increased maximum cell concentration (2.5 vs. 1.1x10⁶ cells/mL) and extended culture duration (17 vs. 9 days).
    • Observed a 60% increase in product titre and significant reduction in lactate and ammonia production.

    Conclusions:

    • Metabolic confinement effectively enhances the energetic efficiency of BHK21 cells.
    • This approach successfully increases the production of recombinant antibody/cytokine fusion proteins.
    • The optimized fed-batch strategy holds promise for tumor-targeted therapeutic applications.