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Diversity in host clone performance within a Chinese hamster ovary cell line
Peter M O'Callaghan1, Maud E Berthelot1, Robert J Young1
1Lonza Biologics Plc, New Expression Technologies Group, Cambridge, CB21 6GS, U.K.
Biotechnology Progress
|April 29, 2015
Summary
A diverse toolbox of Chinese hamster ovary (CHO) host cell lines can optimize biomanufacturing. Different CHO cell lines show distinct capabilities for producing therapeutic proteins like monoclonal antibodies and etanercept, impacting product quality.
Area of Science:
- Biotechnology
- Cell Line Engineering
- Biopharmaceutical Manufacturing
Background:
- Chinese hamster ovary (CHO) cell lines are crucial for recombinant therapeutic protein (rP) synthesis.
- Increasing diversity in rP formats necessitates tailored host cell capabilities.
- A toolbox approach using multiple CHO host cell lines could enhance biomanufacturing efficiency and product quality.
Purpose of the Study:
- To evaluate a panel of clonally derived CHOK1SV host cell lines for manufacturing model proteins.
- To assess variations in protein synthesis capabilities and product quality (PQ) among different host cell lines.
- To investigate host cell characteristics, including glycosylation pathways and organelle levels, correlating with production performance.
Main Methods:
- Isolation and characterization of clonally derived CHOK1SV host cell lines.
- Production of model proteins (IgG4 monoclonal antibody and etanercept) in transient and stable pool formats.
- Analysis of product quality attributes using N-glycan ultra-performance liquid chromatography (UPLC) and liquid chromatography-tandem mass spectrometry (LC-MS/MS).
- Examination of glycosylation pathway gene expression and endoplasmic reticulum (ER) and mitochondria levels in host cells.
Main Results:
- Significant variations observed in the synthesis of monoclonal antibodies and etanercept across different host cell lines.
- Substantial differences in N-glycan micro-heterogeneity for monoclonal antibodies and N/O-linked macro-heterogeneity for etanercept were identified.
- A moderate correlation was found between endoplasmic reticulum (ER) mass and volumetric product concentration in monoclonal antibody production.
Conclusions:
- Leveraging the inherent diversity within the CHOK1SV cell pool enables the identification of specialized host cell lines.
- Different host cell lines exhibit distinct performance characteristics for producing specific recombinant therapeutic proteins.
- This study highlights the utility of a host cell toolbox approach for optimizing biomanufacturing processes and ensuring product quality.
