Super7 passaging method to improve Chinese hamster ovary cell fed-batch performance.

Area of Science:

• Biotechnology
• Cell Culture Technology
• Biopharmaceutical Manufacturing

Background:

• Chinese hamster ovary (CHO) cells are critical for biopharmaceutical production, particularly monoclonal antibodies (mAbs).
• Production instability, a decline in cell productivity over time, is a significant challenge in CHO cell cultures.
• This instability necessitates strategies to maintain high yields during manufacturing.

Purpose of the Study:

• To develop and evaluate a novel passaging strategy to counteract production instability in CHO cell lines.
• To improve the volumetric productivity and stability of CHO cell cultures used for biopharmaceutical manufacturing.
• To offer a method that mitigates instability without requiring genetic engineering or new cell line development.

Main Methods:

• A new passaging strategy, termed Super7, was designed to mimic the initial 7 days of a fed-batch process.
• CHO cell cultures were passaged using the Super7 method for 6 weeks, monitoring growth rates and oxidative metabolism.
• Fed-batch cultures were initiated using cells passaged with the Super7 method and compared to conventional passaging.

Main Results:

• Super7-passaged cultures exhibited lower net growth rates and increased oxidative metabolism over 6 weeks.
• Fed-batch cultures inoculated with Super7-passaged cells showed enhanced net growth rates and oxidative metabolism.
• Cells passaged with the Super7 method yielded 80%-160% more mAbs per unit volume compared to conventional methods.

Conclusions:

• The Super7 passaging strategy effectively mitigates production instability in CHO-K1 cell lines.
• This method enhances cell culture performance and volumetric productivity for mAb manufacturing.
• Super7 offers a practical solution to improve biopharmaceutical production without complex interventions.