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• W4224235890 abstract "Understanding the impact of spatial heterogeneities that are known to occur in large-scale cell culture bioreactors remains a significant challenge. This work presents a novel methodology for mimicking the effects of pH and dissolved oxygen heterogeneities on Chinese hamster ovary (CHO) cell culture performance and antibody quality characteristics, using an automated miniature bioreactor system. Cultures of 4 different cell lines, expressing 3 IgG molecules and one fusion protein, were exposed to repeated pH and dissolved oxygen tension (DOT) fluctuations between pH 7.0-7.5 and DOT 10%-30%, respectively, for durations of 15, 30, and 60 min. Fluctuations in pH had a minimal impact on growth, productivity, and product quality although some changes in lactate metabolism were observed. DOT fluctuations were found to have a more significant impact; a 35% decrease in cell growth and product titre was observed in the fastest growing cell line tested, while all cell lines exhibited a significant increase in lactate accumulation. Product quality analysis yielded varied results; two cell lines showed an increase in the G0F glycan and decrease in G1F, G2F, and Man5; however, another line showed the opposite trend. The study suggests that the response of CHO cells to the effects of fluctuating culture conditions is cell line specific and that higher growing cell lines are most impacted. The miniature bioreactor system described in this work therefore provides a platform for use during early stage cell culture process development to identify cell lines that may be adversely impacted by the pH and DOT heterogeneities encountered on scale-up. This experimental data can be combined with computational modeling approaches to predict overall cell culture performance in large-scale bioreactors." @default.
• W4224235890 created "2022-04-26" @default.
• W4224235890 creator A5004665347 @default.
• W4224235890 creator A5017636218 @default.
• W4224235890 creator A5037059456 @default.
• W4224235890 date "2022-05-07" @default.
• W4224235890 modified "2023-10-14" @default.
• W4224235890 title "Development of a miniature bioreactor model to study the impact of <scp>pH</scp> and <scp>DOT</scp> fluctuations on <scp>CHO</scp> cell culture performance as a tool to understanding heterogeneity effects at large‐scale" @default.
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• W4224235890 doi "https://doi.org/10.1002/btpr.3264" @default.
• W4224235890 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35441833" @default.
• W4224235890 hasPublicationYear "2022" @default.
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