Title:
Optimising E. coli Plasmid DNA Production with the Eppendorf DASbox® Mini Bioreactor System
Synopsis:
Efficient plasmid DNA production lies at the heart of today’s gene therapy and mRNA vaccine manufacturing. In this application note, Eppendorf demonstrates how the DASbox® Mini Bioreactor System enables researchers to scale from development to production while maintaining exceptional yield, reproducibility, and process control. Using E. coli DH5α, the study compares batch and fed-batch fermentations—revealing how precise control of dissolved oxygen, feeding profiles, and growth conditions can double plasmid DNA output and simplify process optimisation for biopharma innovators.
Key Highlights:
- Demonstrated scalability and reproducibility: Parallel batch and fed-batch runs showcase seamless process transfer from small to pilot scale.
- Superior plasmid DNA yield: Fed-batch fermentation achieved up to 56.5 mg pDNA, nearly twice the yield of batch mode.
- Enhanced cell density and growth control: Dynamic DO-cascade regulation maintained optimal oxygen levels, supporting high biomass formation.
- Automated precision feeding: Script-controlled feed initiation triggered by DO-spike detection ensured consistent nutrient delivery and process stability.
- Streamlined process development: The DASbox® platform integrates monitoring, data logging, and automation—enabling rapid optimisation for pDNA, mRNA, and viral-vector applications.
