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Updated: Mar 12, 2026

Process Optimization using High Throughput Automated Micro-Bioreactors in Chinese Hamster Ovary Cell Cultivation
Published on: May 18, 2020
Advances in analytical methodologies to guide bioprocess engineering for bio-therapeutics
Radka Saldova1, Michelle Kilcoyne2, Henning Stöckmann1
1NIBRT GlycoScience Group, The National Institute for Bioprocessing Research and Training, Fosters Avenue, Mount Merrion, Blackrock, Dublin 4, Ireland.
This study monitored recombinant antibody glycoforms in CHO cells using high-throughput methods. Glycosylation analysis revealed significant time-dependent decreases in sialylation and branching.
Area of Science:
- Biopharmaceutical Manufacturing
- Glycobiology
- Cell Culture Technology
Background:
- Monitoring glycosylation is crucial for recombinant protein quality.
- CHO cells are widely used for biopharmaceutical production.
- Fed-batch bioreactor processes require robust analytical tools.
Purpose of the Study:
- To monitor glycoform distribution of a recombinant antibody fusion protein.
- To assess glycosylation status in CHO cell cultures during fed-batch runs.
- To evaluate high-throughput methods for bioprocess monitoring.
Main Methods:
- Analysis of N-glycans using HILIC-UPLC and Mass Spectrometry (MS).
- Profiling of total glycosylation (N- and O-linked) via lectin microarrays.
- Monitoring of three bioreactors across five time-points.
Main Results:
- Cell glycoproteins showed high mannose N-glycans; secreted glycoproteins were complex.
- No significant inter-bioreactor differences were observed.
- Significant decreases in sialylation, branching, and high mannose N-glycans over time.
Conclusions:
- HILIC-UPLC and lectin microarrays offer powerful, rapid high-throughput profiling.
- These methods enable qualitative and quantitative data for biopharmaceutical processes.
- Near 'real-time' monitoring of biopharmaceutical products is achievable.
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