Microplates with integrated oxygen sensing for medium optimization in animal cell culture

Area of Science:

• Biotechnology
• Cell Culture Technology
• Bioprocess Engineering

Background:

• Optimizing mammalian cell culture media is crucial for biopharmaceutical production.
• Traditional methods are often time-consuming and resource-intensive.
• Accurate monitoring of culture parameters is essential for efficient optimization.

Purpose of the Study:

• To develop and validate a novel microtiter plate cultivation system for rapid mammalian cell culture medium optimization.
• To utilize on-line dissolved oxygen (DO) measurements for calculating oxygen uptake rates (OUR) as indicators of culture viability.
• To identify optimal concentrations of glucose, glutamine, and inorganic salts for Chinese Hamster Ovary (CHO) cell cultivation.

Main Methods:

• Microtiter plate cultivation with integrated on-line dissolved oxygen monitoring.
• Dynamic liquid phase balance for calculating oxygen uptake rates (OUR).
• Application of a 2(3) full factorial central composite design for medium optimization.
• Cultivation of a Chinese Hamster Ovary (CHO) cell line.

Main Results:

• The developed method successfully optimized medium composition for CHO cell cultivation in a single run.
• Oxygen uptake rates derived from DO measurements served as reliable indicators of culture viability.
• Inorganic salt concentration was identified as a significant factor influencing CHO cell cultivation.

Conclusions:

• The novel microtiter plate system offers a high-throughput and efficient approach for mammalian cell culture medium optimization.
• This method reduces the time and effort required for investigating multiple medium variables.
• The technique holds significant potential for improving bioprocess development and cell culture procedures.