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Desmurget C, Perilleux A, Souquet J, Borth N, Douet J. Molecular biomarkers identification and applications in CHO bioprocessing. J Biotechnol 2024; 392:11-24. [PMID: 38852681 DOI: 10.1016/j.jbiotec.2024.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 05/23/2024] [Accepted: 06/04/2024] [Indexed: 06/11/2024]
Abstract
Biomarkers are valuable tools in clinical research where they allow to predict susceptibility to diseases, or response to specific treatments. Likewise, biomarkers can be extremely useful in the biomanufacturing of therapeutic proteins. Indeed, constraints such as short timelines and the need to find hyper-productive cells could benefit from a data-driven approach during cell line and process development. Many companies still rely on large screening capacities to develop productive cell lines, but as they reach a limit of production, there is a need to go from empirical to rationale procedures. Similarly, during bioprocessing runs, substrate consumption and metabolism wastes are commonly monitored. None of them possess the ability to predict the culture behavior in the bioreactor. Big data driven approaches are being adapted to the study of industrial mammalian cell lines, enabled by the publication of Chinese hamster and CHO genome assemblies which allowed the use of next-generation sequencing with these cells, as well as continuous proteome and metabolome annotation. However, if these different -omics technologies contributed to the characterization of CHO cells, there is a significant effort remaining to apply this knowledge to biomanufacturing methods. The correlation of a complex phenotype such as high productivity or rapid growth to the presence or expression level of a specific biomarker could save time and effort in the screening of manufacturing cell lines or culture conditions. In this review we will first discuss the different biological molecules that can be identified and quantified in cells, their detection techniques, and associated challenges. We will then review how these markers are used during the different steps of cell line and bioprocess development, and the inherent limitations of this strategy.
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Affiliation(s)
- Caroline Desmurget
- Merck Biotech Development Center, Ares Trading SA (an affiliate of Merck KGaA, Darmstadt, Germany), Fenil-sur-Corsier, Switzerland
| | - Arnaud Perilleux
- Merck Biotech Development Center, Ares Trading SA (an affiliate of Merck KGaA, Darmstadt, Germany), Fenil-sur-Corsier, Switzerland
| | - Jonathan Souquet
- Merck Biotech Development Center, Ares Trading SA (an affiliate of Merck KGaA, Darmstadt, Germany), Fenil-sur-Corsier, Switzerland
| | - Nicole Borth
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Julien Douet
- Merck Biotech Development Center, Ares Trading SA (an affiliate of Merck KGaA, Darmstadt, Germany), Fenil-sur-Corsier, Switzerland.
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2
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Zhang X, Wang Y, Yi D, Zhang C, Ning B, Fu Y, Jia Y, Wang T, Wang X. Synergistic promotion of transient transgene expression in CHO cells by PDI/XBP-1s co-transfection and mild hypothermia. Bioprocess Biosyst Eng 2024; 47:557-565. [PMID: 38416261 DOI: 10.1007/s00449-024-02987-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 02/16/2024] [Indexed: 02/29/2024]
Abstract
Transient gene expression system is an important tool for rapid production of recombinant proteins in Chinese hamster ovary (CHO) cells. However, their low productivity is the main hurdle to overcome. An effective approach through which to obtain high protein yield involves targeting transcriptional, post-transcriptional events (PTEs), and culture conditions. Here, we investigated the effects of protein disulfide isomerase (PDI) and spliced X-box binding protein 1 (XBP-1s) co-overexpression combined with mild hypothermia on the transient yields of recombinant proteins in CHO cells. The results showed that the gene of interest (GOI) and the PDI/XBP-1s helper vector at a co-transfection ratio of 10:1 could obviously increase transient expression level of recombinant protein in CHO cells. However, PDI/XBP-1s overexpression had no significance effect on the mRNA levels of the recombinant protein, suggesting that it targeted PTEs. Moreover, the increased production was due to the enhancing of cell specific productivity, not related to cell growth, viability, and cell cycle. In addition, combined PDI/XBP-1s co-overexpression and mild hypothermia could further improve Adalimumab expression, compared to the control/37 °C and PDI/XBP-1s/37 °C, the Adalimumab volume yield of PDI/XBP-1s/33 °C increased by 203% and 142%, respectively. Mild hypothermia resulted in 3.52- and 2.33-fold increase in the relative mRNA levels of PDI and XBP-1s, respectively. In conclusion, the combination of PDI/XBP-1s overexpression and culture temperature optimization can achieve higher transient expression of recombinant protein, which provides a synergetic strategy to improve transient production of recombinant protein in CHO cells.
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Affiliation(s)
- Xi Zhang
- School of Pharmacy, Xinxiang Medical University, Xinxiang, 453003, China
| | - Yaokun Wang
- The School of Medical Humanities, Xinxiang Medical University, Xinxiang, 453003, China
| | - Dandan Yi
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, 453003, China
| | - Chi Zhang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, 453003, China
| | - Binhuan Ning
- School of Pharmacy, Xinxiang Medical University, Xinxiang, 453003, China
| | - Yushun Fu
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, 453003, China
| | - Yanlong Jia
- School of Pharmacy, Xinxiang Medical University, Xinxiang, 453003, China
| | - Tianyun Wang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, 453003, China.
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, 453003, China.
| | - Xiaoyin Wang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, 453003, China.
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, 453003, China.
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3
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Nguyen M, Zimmer A. A reflection on the improvement of Chinese Hamster ovary cell-based bioprocesses through advances in proteomic techniques. Biotechnol Adv 2023; 65:108141. [PMID: 37001570 DOI: 10.1016/j.biotechadv.2023.108141] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 03/05/2023] [Accepted: 03/24/2023] [Indexed: 03/31/2023]
Abstract
Chinese hamster ovary (CHO) cells are the preferred mammalian host for the large-scale production of recombinant proteins in the biopharmaceutical industry. Research endeavors have been directed to the optimization of CHO-based bioprocesses to increase protein quantity and quality, often in an empirical manner. To provide a rationale for those achievements, a myriad of CHO proteomic studies has arisen in recent decades. This review gives an overview of significant advances in LC-MS-based proteomics and sheds light on CHO proteomic studies, with a particular focus on CHO cells with superior bioprocessing phenotypes (growth, viability, titer, productivity and cQA), that have exploited novel proteomic or sub-omic techniques. These proteomic findings expand the current knowledge and understanding about the underlying protein clusters, protein regulatory networks and biological pathways governing such phenotypic changes. The proteomic studies, highlighted herein, will help in the targeted modulation of these cell factories to the desired needs.
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4
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Engineering of Chinese hamster ovary cells for co-overexpressing MYC and XBP1s increased cell proliferation and recombinant EPO production. Sci Rep 2023; 13:1482. [PMID: 36707606 PMCID: PMC9883479 DOI: 10.1038/s41598-023-28622-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 01/20/2023] [Indexed: 01/29/2023] Open
Abstract
Improving the cellular capacity of Chinese hamster ovary (CHO) cells to produce large amounts of therapeutic proteins remains a major challenge for the biopharmaceutical industry. In previous studies, we observed strong correlations between the performance of CHO cells and expression of two transcription factors (TFs), MYC and XBP1s. Here, we have evaluated the effective of overexpression of these two TFs on CHO cell productivity. To address this goal, we generated an EPO-producing cell line (CHOEPO) using a targeted integration approach, and subsequently engineered it to co-overexpress MYC and XBP1s (a cell line referred to as CHOCXEPO). Cells overexpressing MYC and XBP1s increased simultaneously viable cell densities and EPO production, leading to an enhanced overall performance in cultures. These improvements resulted from the individual effect of each TF in the cell behaviour (i.e., MYC-growth and XBP1s-productivity). An evaluation of the CHOCXEPO cells under different environmental conditions (temperature and media glucose concentration) indicated that CHOCXEPO cells increased cell productivity in high glucose concentration. This study showed the potential of combining TF-based cell engineering and process optimisation for increasing CHO cell productivity.
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5
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The potential of cold-shock promoters for the expression of recombinant proteins in microbes and mammalian cells. J Genet Eng Biotechnol 2022; 20:173. [PMID: 36580173 PMCID: PMC9800685 DOI: 10.1186/s43141-022-00455-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 12/15/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUND Low-temperature expression of recombinant proteins may be advantageous to support their proper folding and preserve bioactivity. The generation of expression vectors regulated under cold conditions can improve the expression of some target proteins that are difficult to express in different expression systems. The cspA encodes the major cold-shock protein from Escherichia coli (CspA). The promoter of cspA has been widely used to develop cold shock-inducible expression platforms in E. coli. Moreover, it is often necessary to employ expression systems other than bacteria, particularly when recombinant proteins require complex post-translational modifications. Currently, there are no commercial platforms available for expressing target genes by cold shock in eukaryotic cells. Consequently, genetic elements that respond to cold shock offer the possibility of developing novel cold-inducible expression platforms, particularly suitable for yeasts, and mammalian cells. CONCLUSIONS This review covers the importance of the cellular response to low temperatures and the prospective use of cold-sensitive promoters to direct the expression of recombinant proteins. This concept may contribute to renewing interest in applying white technologies to produce recombinant proteins that are difficult to express.
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Enhanced recombinant protein production in CHO cell continuous cultures under growth-inhibiting conditions is associated with an arrested cell cycle in G1/G0 phase. PLoS One 2022; 17:e0277620. [PMCID: PMC9662745 DOI: 10.1371/journal.pone.0277620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 10/31/2022] [Indexed: 11/16/2022] Open
Abstract
Low temperature and sodium butyrate (NaBu) are two of the most used productivity-enhancing strategies in CHO cell cultures during biopharmaceutical manufacturing. While these two approaches alter the balance in the reciprocal relationship between cell growth and productivity, we do not fully understand their mechanisms of action beyond a gross cell growth inhibition. Here, we used continuous culture to evaluate the differential effect of low temperature and NaBu supplementation on CHO cell performance and gene expression profile. We found that an increase in cell-productivity under growth-inhibiting conditions was associated with the arrest of cells in the G1/G0 phase. A transcriptome analysis revealed that the molecular mechanisms by which low temperature and NaBu arrested cell cycle in G1/G0 differed from each other through the deregulation of different cell cycle checkpoints and regulators. The individual transcriptome changes in pattern observed in response to low temperature and NaBu were retained when these two strategies were combined, leading to an additive effect in arresting the cell cycle in G1/G0 phase. The findings presented here offer novel molecular insights about the cell cycle regulation during the CHO cell bioprocessing and its implications for increased recombinant protein production. This data provides a background for engineering productivity-enhanced CHO cell lines for continuous manufacturing.
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7
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Effects and mechanisms of animal-free hydrolysates on recombination protein yields in CHO cells. Appl Microbiol Biotechnol 2022; 106:7387-7396. [PMID: 36229612 DOI: 10.1007/s00253-022-12229-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/02/2022] [Accepted: 10/03/2022] [Indexed: 11/02/2022]
Abstract
Chinese hamster ovary (CHO) cells are the commonly used cell lines for producing recombinant therapeutic proteins (RTPs) because they possess post-translational modifications similar to human cells. Culture media are necessary for cell growth, and their quality affects the yields and quality of RTPs. Due to safety concerns for the complex purification of RTPs, the development of serum-free media (SFM) is necessary for CHO cells. To meet the need for CHO cells with higher cell density and RTP productivity with consistent product quality in large-scale suspension cultures, the optimization of SFM through adding some enzymatic animal-free hydrolysates (AFHs) is preferred. The AFHs can improve cell culture performance and product yield of RTPs without affecting their quality. Here, the effect and mechanism of various AFHs in improving CHO cell culture performance and protein expression are reviewed. KEY POINTS: • AFHs that improve the recombinant protein yield of CHO cells are reviewed. • AFHs improve recombinant protein yield via influencing cell performance. • The AFHs do not affect the quality of recombinant protein in CHO cells. • AFHs can provide nutrients, block cell cycle, and reduce oxidative stress.
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8
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Torres M, Dickson AJ. Combined gene and environmental engineering offers a synergetic strategy to enhance r-protein production in Chinese hamster ovary cells. Biotechnol Bioeng 2021; 119:550-565. [PMID: 34821376 DOI: 10.1002/bit.28000] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/08/2021] [Accepted: 11/15/2021] [Indexed: 12/14/2022]
Abstract
Environmental growth-inhibition conditions (GICs) have been used extensively for increasing cell-specific productivity (qP ) of Chinese hamster ovary (CHO) cells, with the most common being temperature downshift and sodium butyrate (NaBu) treatment. B lymphocyte-induced maturation protein-1 (BLIMP1) overexpression in CHO cells can also inhibit cell growth and increase product titers and qP . Given the similar responses, this study evaluated the individual and combined effects of BLIMP1 expression, low temperature, and NaBu treatment on culture performance, cell metabolism, and recombinant protein production of CHO cells. As expected, all three interventions decreased cell growth, arrested cells in G1/G0 cell cycle phase, and increased qP . However, CHO cells presented different responses when considering cell viability, recombinant gene expression, and cell metabolism that indicated differences in the molecular loci by which BLIMP1 and GICs generated higher productivities. Combinations of BLIMP1 expression and GICs acted synergistically to inhibit cell growth and maximize r-protein production, with the BLIMP1/NaBu condition leading to the most significant improvements in product titers and qP . This latter condition also proved to substantially increase product yields (up to 9.8 g immunoglobulin G1 [IgG1]/L and 2.2 g erythropoietin-Fc [EPO-Fc]/L) and qP (up to 179 pg/cell/day [pcd] for IgG1 and 30 pcd for EPO-Fc) in high-density perfusion cultures. These findings offered mechanistic insights about the productivity-enhancing effects of BLIMP1 and GICs, as well as their complementarity for generating highly productive processes.
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Affiliation(s)
- Mauro Torres
- Faculty of Science and Engineering, Manchester Institute of Biotechnology, University of Manchester, Manchester, UK.,Department of Chemical Engineering and Analytical Science, Biochemical and Bioprocess Engineering Group, University of Manchester, Manchester, UK
| | - Alan J Dickson
- Faculty of Science and Engineering, Manchester Institute of Biotechnology, University of Manchester, Manchester, UK.,Department of Chemical Engineering and Analytical Science, Biochemical and Bioprocess Engineering Group, University of Manchester, Manchester, UK
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9
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Liu Z, Zhang Z, Qin Y, Chen G, Hu J, Wang Q, Zhou W. The application of Raman spectroscopy for monitoring product quality attributes in perfusion cell culture. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Lee AP, Kok YJ, Lakshmanan M, Leong D, Zheng L, Lim HL, Chen S, Mak SY, Ang KS, Templeton N, Salim T, Wei X, Gifford E, Tan AHM, Bi X, Ng SK, Lee DY, Ling WLW, Ho YS. Multi-omics profiling of a CHO cell culture system unravels the effect of culture pH on cell growth, antibody titer, and product quality. Biotechnol Bioeng 2021; 118:4305-4316. [PMID: 34289087 DOI: 10.1002/bit.27899] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 06/23/2021] [Accepted: 07/12/2021] [Indexed: 12/16/2022]
Abstract
A robust monoclonal antibody (mAb) bioprocess requires physiological parameters such as temperature, pH, or dissolved oxygen to be well-controlled as even small variations in them could potentially impact the final product quality. For instance, pH substantially affects N-glycosylation, protein aggregation, and charge variant profiles, as well as mAb productivity. However, relatively less is known about how pH jointly influences product quality and titer. In this study, we investigated the effect of pH on culture performance, product titer, and quality profiles by applying longitudinal multi-omics profiling, including transcriptomics, proteomics, metabolomics, and glycomics, at three different culture pH set points. The subsequent systematic analysis of multi-omics data showed that pH set points differentially regulated various intracellular pathways including intracellular vesicular trafficking, cell cycle, and apoptosis, thereby resulting in differences in specific productivity, product titer, and quality profiles. In addition, a time-dependent variation in mAb N-glycosylation profiles, independent of pH, was identified to be mainly due to the accumulation of mAb proteins in the endoplasmic reticulum disrupting cellular homeostasis over culture time. Overall, this multi-omics-based study provides an in-depth understanding of the intracellular processes in mAb-producing CHO cell line under varied pH conditions, and could serve as a baseline for enabling the quality optimization and control of mAb production.
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Affiliation(s)
- Alison P Lee
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Yee Jiun Kok
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Meiyappan Lakshmanan
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Dawn Leong
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Lu Zheng
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Hsueh Lee Lim
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Shuwen Chen
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Shi Ya Mak
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Kok Siong Ang
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Neil Templeton
- Process Research and Development, Merck & Co. Inc., West Point, Pennsylvania, USA
| | - Taha Salim
- Process Research and Development, Merck & Co. Inc., Kenilworth, New Jersey, USA
| | - Xiaona Wei
- Scientific Informatics, MSD International GmbH (Singapore Branch), Singapore, Singapore
| | - Eric Gifford
- Scientific Informatics, MSD International GmbH (Singapore Branch), Singapore, Singapore
| | - Andy Hee-Meng Tan
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Xuezhi Bi
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.,Duke-NUS Medical School, Singapore, Singapore
| | - Say Kong Ng
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Dong-Yup Lee
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.,School of Chemical Engineering, Sungkyunkwan University, Seoul, Gyeonggi-do, Republic of Korea
| | - Wai Lam W Ling
- Process Research and Development, Merck & Co. Inc., Kenilworth, New Jersey, USA
| | - Ying Swan Ho
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
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11
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Lin D, Yalamanchili HB, Zhang X, Lewis NE, Alves CS, Groot J, Arnsdorf J, Bjørn SP, Wulff T, Voldborg BG, Zhou Y, Zhang B. CHOmics: A web-based tool for multi-omics data analysis and interactive visualization in CHO cell lines. PLoS Comput Biol 2020; 16:e1008498. [PMID: 33351794 PMCID: PMC7790544 DOI: 10.1371/journal.pcbi.1008498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 01/07/2021] [Accepted: 11/06/2020] [Indexed: 11/18/2022] Open
Abstract
Chinese hamster ovary (CHO) cell lines are widely used in industry for biological drug production. During cell culture development, considerable effort is invested to understand the factors that greatly impact cell growth, specific productivity and product qualities of the biotherapeutics. While high-throughput omics approaches have been increasingly utilized to reveal cellular mechanisms associated with cell line phenotypes and guide process optimization, comprehensive omics data analysis and management have been a challenge. Here we developed CHOmics, a web-based tool for integrative analysis of CHO cell line omics data that provides an interactive visualization of omics analysis outputs and efficient data management. CHOmics has a built-in comprehensive pipeline for RNA sequencing data processing and multi-layer statistical modules to explore relevant genes or pathways. Moreover, advanced functionalities were provided to enable users to customize their analysis and visualize the output systematically and interactively. The tool was also designed with the flexibility to accommodate other types of omics data and thereby enabling multi-omics comparison and visualization at both gene and pathway levels. Collectively, CHOmics is an integrative platform for data analysis, visualization and management with expectations to promote the broader use of omics in CHO cell research.
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Affiliation(s)
- Dongdong Lin
- Biogen Inc., Cambridge, Massachusetts, United States of America
| | | | - Xinmin Zhang
- Bioinforx Inc., Madison, Wisconsin, United States of America
| | - Nathan E. Lewis
- Departments of Pediatrics and Bioengineering, University of California, San Diego, United States of America
- Novo Nordisk Foundation Center for Bio sustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | | | - Joost Groot
- Biogen Inc., Cambridge, Massachusetts, United States of America
| | - Johnny Arnsdorf
- Novo Nordisk Foundation Center for Bio sustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Sara P. Bjørn
- Novo Nordisk Foundation Center for Bio sustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Tune Wulff
- Novo Nordisk Foundation Center for Bio sustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Bjørn G. Voldborg
- Novo Nordisk Foundation Center for Bio sustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Yizhou Zhou
- Biogen Inc., Cambridge, Massachusetts, United States of America
- * E-mail: (YZ); (BZ)
| | - Baohong Zhang
- Biogen Inc., Cambridge, Massachusetts, United States of America
- * E-mail: (YZ); (BZ)
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12
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Pérez-Rodriguez S, Ramírez OT, Trujillo-Roldán MA, Valdez-Cruz NA. Comparison of protein precipitation methods for sample preparation prior to proteomic analysis of Chinese hamster ovary cell homogenates. ELECTRON J BIOTECHN 2020. [DOI: 10.1016/j.ejbt.2020.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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13
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Orellana CA, Martínez VS, MacDonald MA, Henry MN, Gillard M, Gray PP, Nielsen LK, Mahler S, Marcellin E. 'Omics driven discoveries of gene targets for apoptosis attenuation in CHO cells. Biotechnol Bioeng 2020; 118:481-490. [PMID: 32865815 DOI: 10.1002/bit.27548] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 07/22/2020] [Accepted: 08/14/2020] [Indexed: 12/15/2022]
Abstract
Chinese hamster ovary (CHO) cells are widely used in biopharmaceutical production. Improvements to cell lines and bioprocesses are constantly being explored. One of the major limitations of CHO cell culture is that the cells undergo apoptosis, leading to rapid cell death, which impedes reaching high recombinant protein titres. While several genetic engineering strategies have been successfully employed to reduce apoptosis, there is still room to further enhance CHO cell lines performance. 'Omics analysis is a powerful tool to better understand different phenotypes and for the identification of gene targets for engineering. Here, we present a comprehensive review of previous CHO 'omics studies that revealed changes in the expression of apoptosis-related genes. We highlight targets for genetic engineering that have reduced, or have the potential to reduce, apoptosis or to increase cell proliferation in CHO cells, with the final aim of increasing productivity.
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Affiliation(s)
- Camila A Orellana
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia.,Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Verónica S Martínez
- ARC Training Centre for Biopharmaceutical Innovation (CBI), Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia
| | - Michael A MacDonald
- ARC Training Centre for Biopharmaceutical Innovation (CBI), Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia
| | - Matthew N Henry
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia
| | - Marianne Gillard
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia
| | - Peter P Gray
- ARC Training Centre for Biopharmaceutical Innovation (CBI), Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia
| | - Lars K Nielsen
- ARC Training Centre for Biopharmaceutical Innovation (CBI), Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia.,Metabolomics Australia, The University of Queensland, Brisbane, Australia.,The Novo Nordisk Foundation Centre for Biosustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Stephen Mahler
- ARC Training Centre for Biopharmaceutical Innovation (CBI), Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia
| | - Esteban Marcellin
- ARC Training Centre for Biopharmaceutical Innovation (CBI), Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Australia.,Metabolomics Australia, The University of Queensland, Brisbane, Australia
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14
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Torres M, Akhtar S, McKenzie EA, Dickson AJ. Temperature Down-Shift Modifies Expression of UPR-/ERAD-Related Genes and Enhances Production of a Chimeric Fusion Protein in CHO Cells. Biotechnol J 2020; 16:e2000081. [PMID: 32271992 DOI: 10.1002/biot.202000081] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/29/2020] [Indexed: 02/05/2023]
Abstract
Low culture temperature enhances the cell-specific productivity of Chinese hamster ovary (CHO) cells expressing varied recombinant (r-) proteins, but the mechanisms remain unclear. Regulation of unfolded protein response (UPR) pathway genes, such as transcriptional regulatory factors and endoplasmic reticulum (ER)-resident proteins, appear to be involved in the improvements of r-protein production under low temperature conditions. The transcriptional regulation of UPR-specific targets is studied in response to decreased culture temperature in relation to production of a difficult-to-express protein. A clonally-derived CHO cell line expressing a chimeric fusion protein (human erythropoietin [hEPO] linked to a murine Fc region, hEPO-Fc) is evaluated in terms of growth, metabolism, r-protein production and UPR-/ER associated degradation (ERAD)-specific gene expression at standard (37 °C) and low (32 °C) temperature in batch and fed-batch systems. Low temperature decreased peak cell density, improved viability, generated cell cycle arrest in the G1 phase and enhanced hEPO-Fc expression in both batch and fed-batch cultures. A low culture temperature significantly upregulated genes encoding UPR-specific transcriptional activators (xbp1s, ddit3, and atf5) and ER-resident proteins (grp78, grp94, trib3, and ero1α), that are associated with folding and processing of proteins within the ER. Further, low culture temperature decreased expression of genes involved in ERAD (edem3, sels, herpud1, and syvn1) indicating a decreased potential for protein degradation.
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Affiliation(s)
- Mauro Torres
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, M1 7DN, UK
| | - Samia Akhtar
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, M1 7DN, UK
| | - Edward A McKenzie
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, M1 7DN, UK.,Protein Expression Facility, Manchester Institute of Biotechnology, Faculty of Life Sciences, University of Manchester, Manchester, M1 7DN, UK
| | - Alan J Dickson
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, M1 7DN, UK
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15
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Henry MN, MacDonald MA, Orellana CA, Gray PP, Gillard M, Baker K, Nielsen LK, Marcellin E, Mahler S, Martínez VS. Attenuating apoptosis in Chinese hamster ovary cells for improved biopharmaceutical production. Biotechnol Bioeng 2020; 117:1187-1203. [DOI: 10.1002/bit.27269] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 11/25/2019] [Accepted: 01/04/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Matthew N. Henry
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Queensland Australia
| | - Michael A. MacDonald
- ARC Training Centre for Biopharmaceutical Innovation (CBI) Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane Queensland Australia
| | - Camila A. Orellana
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Queensland Australia
| | - Peter P. Gray
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Queensland Australia
| | - Marianne Gillard
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Queensland Australia
| | - Kym Baker
- ARC Training Centre for Biopharmaceutical Innovation (CBI) Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane Queensland Australia
- Patheon Biologics—A Part of Thermo Fisher Scientific Brisbane Queensland Australia
| | - Lars K. Nielsen
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Queensland Australia
- ARC Training Centre for Biopharmaceutical Innovation (CBI) Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane Queensland Australia
- Metabolomics Australia The University of Queensland Brisbane Queensland Australia
- The Novo Nordisk Foundation Center for Biosustainability Technical University of Denmark Kgs. Lyngby Denmark
| | - Esteban Marcellin
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Queensland Australia
- ARC Training Centre for Biopharmaceutical Innovation (CBI) Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane Queensland Australia
- Metabolomics Australia The University of Queensland Brisbane Queensland Australia
| | - Stephen Mahler
- ARC Training Centre for Biopharmaceutical Innovation (CBI) Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane Queensland Australia
| | - Verónica S. Martínez
- ARC Training Centre for Biopharmaceutical Innovation (CBI) Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane Queensland Australia
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16
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Tang P, Xu J, Louey A, Tan Z, Yongky A, Liang S, Li ZJ, Weng Y, Liu S. Kinetic modeling of Chinese hamster ovary cell culture: factors and principles. Crit Rev Biotechnol 2020; 40:265-281. [DOI: 10.1080/07388551.2019.1711015] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Peifeng Tang
- Department of Paper and Bioprocess Engineering, SUNY-ESF, Syracuse, NY, USA
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Jianlin Xu
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Alastair Louey
- Elpiscience Biopharma, Cayman Islands George Town, Grand Cayman, UK
| | - Zhijun Tan
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Andrew Yongky
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Shaoyan Liang
- Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT, USA
| | - Zheng Jian Li
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Yongyan Weng
- Department of Civil Engineering, University of Nottingham, Nottingham, UK
| | - Shijie Liu
- Department of Paper and Bioprocess Engineering, SUNY-ESF, Syracuse, NY, USA
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17
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Mammalian Systems Biotechnology Reveals Global Cellular Adaptations in a Recombinant CHO Cell Line. Cell Syst 2019; 4:530-542.e6. [PMID: 28544881 DOI: 10.1016/j.cels.2017.04.009] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 02/14/2017] [Accepted: 04/26/2017] [Indexed: 01/16/2023]
Abstract
Effective development of host cells for therapeutic protein production is hampered by the poor characterization of cellular transfection. Here, we employed a multi-omics-based systems biotechnology approach to elucidate the genotypic and phenotypic differences between a wild-type and recombinant antibody-producing Chinese hamster ovary (CHO) cell line. At the genomic level, we observed extensive rearrangements in specific targeted loci linked to transgene integration sites. Transcriptional re-wiring of DNA damage repair and cellular metabolism in the antibody producer, via changes in gene copy numbers, was also detected. Subsequent integration of transcriptomic data with a genome-scale metabolic model showed a substantial increase in energy metabolism in the antibody producer. Metabolomics, lipidomics, and glycomics analyses revealed an elevation in long-chain lipid species, potentially associated with protein transport and secretion requirements, and a surprising stability of N-glycosylation profiles between both cell lines. Overall, the proposed knowledge-based systems biotechnology framework can further accelerate mammalian cell-line engineering in a targeted manner.
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18
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Hennicke J, Reinhart D, Altmann F, Kunert R. Impact of temperature and pH on recombinant human IgM quality attributes and productivity. N Biotechnol 2019; 50:20-26. [PMID: 30630093 DOI: 10.1016/j.nbt.2019.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 01/02/2019] [Accepted: 01/04/2019] [Indexed: 12/28/2022]
Abstract
IgM antibodies are arousing considerable interest as biopharmaceuticals. Despite their immunotherapeutic potential, little is known about the impact of environmental conditions on product quantity and quality of these complex molecules. Process conditions influence the critical quality attributes (CQAs) of therapeutic proteins and thus are important parameters for biological safety and efficacy. Here, the results of a systematic study are presented that characterized the influence of temperature and pH on cell-specific productivity and IgM quality attributes. Biphasic temperature and pH shift experiments were performed as batch cultures in DASGIP® bioreactors under controlled conditions and defined by a specific design of experiment (DOE) approach. An internally-developed recombinant IgM producing CHO cell line was used. With respect to product quality, after an initial purification step efforts were focused on pentamer content, nucleic acid (NA) impurities and the glycosylation profile after an initial purification step. All quality attributes were evaluated by densitometric and chromatographic methods. The reduction of cultivation temperature severely reduced IgM titers, while pH variation had no impact. In contrast, IgM quality was not significantly influenced by bioprocessing parameters. Data revealed that an additional purification step is required to reduce the presence of NAs for in vivo applications. In conclusion, the results showed that for the chosen IgM model, IgM012_GL, variation in quality attributes is not caused by the environmental conditions of temperature and pH.
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Affiliation(s)
- Julia Hennicke
- Department of Biotechnology, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - David Reinhart
- Department of Biotechnology, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Friedrich Altmann
- Department of Chemistry, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Renate Kunert
- Department of Biotechnology, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria.
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19
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Lee JS, Park JH, Ha TK, Samoudi M, Lewis NE, Palsson BO, Kildegaard HF, Lee GM. Revealing Key Determinants of Clonal Variation in Transgene Expression in Recombinant CHO Cells Using Targeted Genome Editing. ACS Synth Biol 2018; 7:2867-2878. [PMID: 30388888 DOI: 10.1021/acssynbio.8b00290] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Generation of recombinant Chinese hamster ovary (rCHO) cell lines is critical for the production of therapeutic proteins. However, the high degree of phenotypic heterogeneity among generated clones, referred to as clonal variation, makes the rCHO cell line development process inefficient and unpredictable. Here, we investigated the major genomic causes of clonal variation. We found the following: (1) consistent with previous studies, a strong variation in rCHO clones in response to hypothermia (33 vs 37 °C) after random transgene integration; (2) altered DNA sequence of randomly integrated cassettes, which occurred during the integration process, affecting the transgene expression level in response to hypothermia; (3) contrary to random integration, targeted integration of the same expression cassette, without any DNA alteration, into three identified integration sites showed the similar response of transgene expression in response to hypothermia, irrespective of integration site; (4) switching the promoter from CMV to EF1α eliminated the hypothermia response; and (5) deleting the enhancer part of the CMV promoter altered the hypothermia response. Thus, we have revealed the effects of integration methods and cassette design on transgene expression levels, implying that rCHO cell line generation can be standardized through detailed genomic understanding. Further elucidation of such understanding is likely to have a broad impact on diverse fields that use transgene integration, from gene therapy to generation of production cell lines.
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Affiliation(s)
- Jae Seong Lee
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Jin Hyoung Park
- Department of Biological Sciences, KAIST, 291 Daehak-ro,
Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Tae Kwang Ha
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Mojtaba Samoudi
- Department of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
- The Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego School of Medicine, La Jolla, California 92093, United States
| | - Nathan E. Lewis
- Department of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
- The Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego School of Medicine, La Jolla, California 92093, United States
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Bernhard O. Palsson
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
- Department of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Helene Faustrup Kildegaard
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Gyun Min Lee
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
- Department of Biological Sciences, KAIST, 291 Daehak-ro,
Yuseong-gu, Daejeon 305-701, Republic of Korea
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20
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21
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Tossolini I, López-Díaz FJ, Kratje R, Prieto CC. Characterization of cellular states of CHO-K1 suspension cell culture through cell cycle and RNA-sequencing profiling. J Biotechnol 2018; 286:56-67. [DOI: 10.1016/j.jbiotec.2018.09.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 09/14/2018] [Accepted: 09/17/2018] [Indexed: 01/06/2023]
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22
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Debottlenecking protein secretion and reducing protein aggregation in the cellular host. Curr Opin Biotechnol 2018; 53:151-157. [DOI: 10.1016/j.copbio.2018.01.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 01/05/2018] [Accepted: 01/08/2018] [Indexed: 01/05/2023]
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23
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Kaushik P, Henry M, Clynes M, Meleady P. The Expression Pattern of the Phosphoproteome Is Significantly Changed During the Growth Phases of Recombinant CHO Cell Culture. Biotechnol J 2018; 13:e1700221. [DOI: 10.1002/biot.201700221] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/13/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Prashant Kaushik
- National Institute for Cellular Biotechnology; Dublin City University; Dublin 9 Ireland
| | - Michael Henry
- National Institute for Cellular Biotechnology; Dublin City University; Dublin 9 Ireland
| | - Martin Clynes
- National Institute for Cellular Biotechnology; Dublin City University; Dublin 9 Ireland
| | - Paula Meleady
- National Institute for Cellular Biotechnology; Dublin City University; Dublin 9 Ireland
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24
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Reinhart D, Damjanovic L, Castan A, Ernst W, Kunert R. Differential gene expression of a feed-spiked super-producing CHO cell line. J Biotechnol 2018; 285:23-37. [PMID: 30157452 DOI: 10.1016/j.jbiotec.2018.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/15/2018] [Accepted: 08/25/2018] [Indexed: 01/09/2023]
Abstract
Feed supplements are concentrated cell culture media that contain a variety of nutrients, which can be added during a bioprocess. During fed-batch cultivation, feed media are typically added to a growing cell culture to maximize cell and product concentrations. In this study, only a single shot of feed medium was added on day 0 to a basal cell culture medium and compared to non-supplemented basal medium (feed-spiked at day 0 versus control experiments) by cultivation of a recombinant mAb expressing CHO cell line in batch mode under controlled conditions in a bioreactor. Since the feed-spike at day 0 was based on existing medium components without introducing additional supplements, a desirable process with decreased complexity was generated. Unlike cells in basal medium, feed-spiked cultures reached almost 2× higher peak cell concentrations (10 × 106 c/mL vs. 18 × 106 c/mL) and 3× higher antibody concentrations (0.8 g/L vs. 2.4 g/L). Batch process time and the integral over the viable cell count were similar for both process types. Constantly high cell-specific production rates in feed-spiked cultures (70 pg/cell/day) compared to continuously declining rates in basal medium (from 70 to 10 pg/cell/day) were responsible for an overall 70% higher cell-specific production rate and the higher product concentrations. To associate gene expression patterns to different process proceedings, transcriptome analysis was performed using microarrays. Several transcripts that are involved with glutamine de novo synthesis and citric acid cycle were significantly upregulated on several days in feed-spiked cultures. The top identified gene ontology (GO) terms related well to cell cycle and primary metabolism, cellular division as well as nucleobase formation or regulation, which indicated a more active proliferative state for feed-spiked cultures. KEGG biochemical pathway analysis and Gene set enrichment analysis (GSEA) further confirmed these findings from a complementary perspective. Moreover, several interesting gene targets, which have not yet been associated with recombinant protein expression, were identified that related to a higher proliferative state, growth, protein synthesis, cell-size control, metabolism, cell survival as well as genes that are associated with the control of the mammalian target of rapamycin (mTOR) in feed-spiked cultures. Analysis of critical product quality attributes (i.e. glycosylation, charge variants and size distribution) showed that feed-spiking did not change antibody quality.
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Affiliation(s)
- David Reinhart
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, 1190 Vienna, Austria.
| | - Lukas Damjanovic
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, 1190 Vienna, Austria.
| | - Andreas Castan
- GE Healthcare Life Sciences AB, Björkgatan 30, 75184, Uppsala, Sweden.
| | - Wolfgang Ernst
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, 1190 Vienna, Austria.
| | - Renate Kunert
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, 1190 Vienna, Austria.
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25
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Vergara M, Torres M, Müller A, Avello V, Acevedo C, Berrios J, Reyes JG, Valdez-Cruz NA, Altamirano C. High glucose and low specific cell growth but not mild hypothermia improve specific r-protein productivity in chemostat culture of CHO cells. PLoS One 2018; 13:e0202098. [PMID: 30114204 PMCID: PMC6095543 DOI: 10.1371/journal.pone.0202098] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 07/27/2018] [Indexed: 01/12/2023] Open
Abstract
In the biopharmaceutical sector, Chinese hamster ovary (CHO) cells have become the host of choice to produce recombinant proteins (r-proteins) due to their capacity for correct protein folding, assembly, and posttranslational modification. However, the production of therapeutic r-proteins in CHO cells is expensive and presents insufficient production yields for certain proteins. Effective culture strategies to increase productivity (qp) include a high glucose concentration in the medium and mild hypothermia (28–34 °C), but these changes lead to a reduced specific growth rate. To study the individual and combined impacts of glucose concentration, specific growth rate and mild hypothermia on culture performance and cell metabolism, we analyzed chemostat cultures of recombinant human tissue plasminogen activator (rh-tPA)-producing CHO cell lines fed with three glucose concentrations in feeding media (20, 30 and 40 mM), at two dilution rates (0.01 and 0.018 1/h) and two temperatures (33 and 37 °C). The results indicated significant changes in cell growth, cell cycle distribution, metabolism, and rh-tPA productivity in response to the varying environmental culture conditions. High glucose feed led to constrained cell growth, increased specific rh-tPA productivity and a higher number of cells in the G2/M phase. Low specific growth rate and temperature (33 °C) reduced glucose consumption and lactate production rates. Our findings indicated that a reduced specific growth rate coupled with high feed glucose significantly improves r-protein productivity in CHO cells. We also observed that low temperature significantly reduced qp, but not cell growth when dilution rate was manipulated, regardless of the glucose concentration or dilution rate. In contrast, we determined that feed glucose concentration and consumption rate were the dominant aspects of the growth and productivity in CHO cells by using multivariate analysis.
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Affiliation(s)
- Mauricio Vergara
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Institute of Chemistry, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile
| | - Mauro Torres
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Andrea Müller
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Verónica Avello
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Center of Biotechnology, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - Cristian Acevedo
- Center of Biotechnology, Universidad Técnica Federico Santa María, Valparaíso, Chile
- Institute of Physics, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - Julio Berrios
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Juan G. Reyes
- Institute of Chemistry, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile
| | - Norma A. Valdez-Cruz
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Claudia Altamirano
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Regional Center for Healthy Food Studies (CREAS) R17A10001, CONICYT REGIONAL, GORE Valparaiso, Chile
- * E-mail:
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26
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Singh A, Kildegaard HF, Andersen MR. An Online Compendium of CHO RNA-Seq Data Allows Identification of CHO Cell Line-Specific Transcriptomic Signatures. Biotechnol J 2018; 13:e1800070. [DOI: 10.1002/biot.201800070] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/16/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Ankita Singh
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark; 2800 Kgs. Lyngby Denmark
- Department of Biotechnology and Biomedicine, Technical University of Denmark; 2800 Kgs. Lyngby Denmark
| | - Helene F. Kildegaard
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark; 2800 Kgs. Lyngby Denmark
| | - Mikael R. Andersen
- Department of Biotechnology and Biomedicine, Technical University of Denmark; 2800 Kgs. Lyngby Denmark
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27
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McKenzie EA, Abbott WM. Expression of recombinant proteins in insect and mammalian cells. Methods 2018; 147:40-49. [PMID: 29778647 DOI: 10.1016/j.ymeth.2018.05.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/10/2018] [Accepted: 05/15/2018] [Indexed: 12/12/2022] Open
Abstract
Purified recombinant proteins are key reagents in academic and industrial research. The ability to make these proteins quickly often relies on the availability of higher eukaryotic cell hosts such as insect and mammalian cells where there is a very wide range of post-translational modifications, protein folding and trafficking pathways. This enables the generation of many proteins that cannot be made in microbial hosts. In this article we outline some of the most commonly used methods to express recombinant proteins in insect and mammalian cells.
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Affiliation(s)
- Edward A McKenzie
- Protein Expression Facility, Manchester Institute of Biotechnology, Faculty of Life Sciences, 131 Princess Street, Manchester M1 7DN, UK
| | - W Mark Abbott
- Peak Proteins Ltd, Alderley Park, Cheshire SK10 4TG, UK.
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28
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Torres M, Zúñiga R, Gutierrez M, Vergara M, Collazo N, Reyes J, Berrios J, Aguillon JC, Molina MC, Altamirano C. Mild hypothermia upregulates myc and xbp1s expression and improves anti-TNFα production in CHO cells. PLoS One 2018; 13:e0194510. [PMID: 29566086 PMCID: PMC5864046 DOI: 10.1371/journal.pone.0194510] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 02/21/2018] [Indexed: 12/31/2022] Open
Abstract
Chinese hamster ovary (CHO) cells are the most frequently used host for commercial production of therapeutic proteins. However, their low protein productivity in culture is the main hurdle to overcome. Mild hypothermia has been established as an effective strategy to enhance protein specific productivity, although the causes of such improvement still remain unclear. The self-regulation of global transcriptional regulatory factors, such as Myc and XBP1s, seems to be involved in increased the recombinant protein production at low temperature. This study evaluated the impact of low temperature in CHO cell cultures on myc and xbp1s expression and their effects on culture performance and cell metabolism. Two anti-TNFα producing CHO cell lines were selected considering two distinct phenotypes: i.e. maximum cell growth, (CN1) and maximum specific anti-TNFα production (CN2), and cultured at 37, 33 and 31°C in a batch system. Low temperature led to an increase in the cell viability, the expression of the recombinant anti-TNFα and the production of anti-TNFα both in CN1 and CN2. The higher production of anti-TNFα in CN2 was mainly associated with the large expression of anti-TNFα. Under mild hypothermia myc and xbp1s expression levels were directly correlated to the maximal viable cell density and the specific anti-TNFα productivity, respectively. Moreover, cells showed a simultaneous metabolic shift from production to consumption of lactate and from consumption to production of glutamine, which were exacerbated by reducing culture temperature and coincided with the increased anti-TNFα production. Our current results provide new insights of the regulation of myc and xbp1s in CHO cells at low temperature, and suggest that the presence and magnitude of the metabolic shift might be a relevant metabolic marker of productive cell line.
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Affiliation(s)
- Mauro Torres
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Roberto Zúñiga
- Centro de InmunoBiotecnología, Programa D. de Inmunología, Instituto de Ciencias Biomédica (ICBM), Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Doctorado en Química, Universidad República Oriental del Uruguay, Montevideo, Uruguay
| | - Matias Gutierrez
- Centro de InmunoBiotecnología, Programa D. de Inmunología, Instituto de Ciencias Biomédica (ICBM), Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Mauricio Vergara
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Doctorado en Química, Universidad República Oriental del Uruguay, Montevideo, Uruguay
| | - Norberto Collazo
- Centro de InmunoBiotecnología, Programa D. de Inmunología, Instituto de Ciencias Biomédica (ICBM), Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Juan Reyes
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile
| | - Julio Berrios
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Juan Carlos Aguillon
- Centro de InmunoBiotecnología, Programa D. de Inmunología, Instituto de Ciencias Biomédica (ICBM), Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Maria Carmen Molina
- Centro de InmunoBiotecnología, Programa D. de Inmunología, Instituto de Ciencias Biomédica (ICBM), Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Claudia Altamirano
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- CREAS CONICYT Regional GORE, Valparaiso, Chile
- * E-mail:
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29
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Orellana CA, Marcellin E, Palfreyman RW, Munro TP, Gray PP, Nielsen LK. RNA-Seq Highlights High Clonal Variation in Monoclonal Antibody Producing CHO Cells. Biotechnol J 2018; 13:e1700231. [DOI: 10.1002/biot.201700231] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 12/12/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Camila A. Orellana
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland; Brisbane QLD 4072 Australia
| | - Esteban Marcellin
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland; Brisbane QLD 4072 Australia
- Metabolomics Australia (Queensland Node), The University of Queensland; Brisbane QLD 4072 Australia
| | - Robin W. Palfreyman
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland; Brisbane QLD 4072 Australia
| | - Trent P. Munro
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland; Brisbane QLD 4072 Australia
| | - Peter P. Gray
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland; Brisbane QLD 4072 Australia
| | - Lars K. Nielsen
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland; Brisbane QLD 4072 Australia
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark; 2800 Kgs, Lyngby Denmark
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Goey CH, Tsang JMH, Bell D, Kontoravdi C. Cascading effect in bioprocessing-The impact of mild hypothermia on CHO cell behavior and host cell protein composition. Biotechnol Bioeng 2017; 114:2771-2781. [PMID: 28843000 DOI: 10.1002/bit.26437] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 07/26/2017] [Accepted: 08/21/2017] [Indexed: 12/18/2022]
Abstract
A major challenge in downstream purification of monoclonal antibodies (mAb) is the removal of host cell proteins (HCPs). Previous studies have shown that cell culture conditions significantly impact the HCP content at harvest. However, it is currently unclear how process conditions affect physiological changes in the host cell population, and how these changes, in turn, cascade down to change the HCP profile. We examined how temperature downshift (TDS) to mild hypothermia affects key upstream performance indicators, that is antibody titre, HCP concentration and HCP species, across the cell culture decline phase and at harvest through the lens of changes in cellular behavior. Mild hypothermic conditions introduced on day 5 of fed-batch Chinese hamster ovary (CHO) cell bioreactors resulted in a lower cell proliferation rate but larger percentages of healthier cells across the cell culture decline phase compared to bioreactors maintained at standard physiological temperature. Moreover, the onset of apoptosis was less evident in mild hypothermic cultures. Consequently, mild hypothermic cultures took an extra 5 days to reach an integral viable cell concentration (IVCC) and antibody yield similar to that of the control at standard physiological temperature. When cell viability dropped below 80%, mild hypothermic cell cultures had a reduced variety of HCP species by 36%, including approximately 44% and 27% lower proteases and chaperones, respectively, despite having similar HCP concentration. This study suggests that TDS may be a good strategy to provide cleaner downstream feedstocks by reducing the variety of HCPs and to maintain product integrity by reducing the number of proteases and chaperones.
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Affiliation(s)
- Cher H Goey
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, London, U.K
| | | | - David Bell
- Department of Medicine, Imperial College London, London, U.K
| | - Cleo Kontoravdi
- Department of Chemical Engineering, Centre for Process Systems Engineering, Imperial College London, London, U.K
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Shridhar S, Klanert G, Auer N, Hernandez-Lopez I, Kańduła MM, Hackl M, Grillari J, Stralis-Pavese N, Kreil DP, Borth N. Transcriptomic changes in CHO cells after adaptation to suspension growth in protein-free medium analysed by a species-specific microarray. J Biotechnol 2017; 257:13-21. [DOI: 10.1016/j.jbiotec.2017.03.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/07/2017] [Accepted: 03/11/2017] [Indexed: 11/26/2022]
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Zou W, Edros R, Al-Rubeai M. The relationship of metabolic burden to productivity levels in CHO cell lines. Biotechnol Appl Biochem 2017; 65:173-180. [PMID: 28681393 DOI: 10.1002/bab.1574] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 06/29/2017] [Indexed: 01/08/2023]
Abstract
The growing demand for recombinant therapeutics has driven biotechnologists to develop new production strategies. One such strategy for increasing the expression of heterologous proteins has focused on enhancing cell-specific productivity through environmental perturbations. In this work, the effects of hypothermia, hyperosmolarity, high shear stress, and sodium butyrate treatment on growth and productivity were studied using three (low, medium, and high producing) CHO cell lines that differed in their specific productivities of monoclonal antibody. In all three cell lines, the inhibitory effect of these parameters on proliferation was demonstrated. Additionally, compared to the control, specific productivity was enhanced under all conditions and exhibited a consistent cell line specific pattern, with maximum increases (50-290%) in the low producer, and minimum increases (7-20%) in the high producer. Thus, the high-producing cell line was less responsive to environmental perturbations than the low-producing cell line. We hypothesize that this difference is most likely due to the bottleneck associated with a higher metabolic burden caused by higher antibody expression. Increased recombinant mRNA levels and pyruvate carboxylase activities due to low temperature and hyperosmotic stress were found to be positively associated with the metabolic burden.
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Affiliation(s)
- Wu Zou
- School of Chemical and Bioprocess Engineering, and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| | - Raihana Edros
- School of Chemical and Bioprocess Engineering, and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| | - Mohamed Al-Rubeai
- School of Chemical and Bioprocess Engineering, and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
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Henry M, Power M, Kaushik P, Coleman O, Clynes M, Meleady P. Differential Phosphoproteomic Analysis of Recombinant Chinese Hamster Ovary Cells Following Temperature Shift. J Proteome Res 2017; 16:2339-2358. [DOI: 10.1021/acs.jproteome.6b00868] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Michael Henry
- National Institute for Cellular
Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Martin Power
- National Institute for Cellular
Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Prashant Kaushik
- National Institute for Cellular
Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Orla Coleman
- National Institute for Cellular
Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Martin Clynes
- National Institute for Cellular
Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Paula Meleady
- National Institute for Cellular
Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
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Pfizenmaier J, Junghans L, Teleki A, Takors R. Hyperosmotic stimulus study discloses benefits in ATP supply and reveals miRNA/mRNA targets to improve recombinant protein production of CHO cells. Biotechnol J 2016; 11:1037-47. [PMID: 27214792 DOI: 10.1002/biot.201500606] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 03/07/2016] [Accepted: 05/12/2016] [Indexed: 01/02/2023]
Abstract
Biopharmaceuticals are predominantly produced by Chinese hamster ovary (CHO) cells cultivated in fed-batch mode. Hyperosmotic culture conditions (≥ 350 mOsmol kg(∑1) ) resulting from feeding of nutrients may enhance specific product formation rates (qp ). As an improved ATP supply was anticipated to enhance qp this study focused on the identification of suitable miRNA/mRNA targets to increase ATP levels. Therefor next generation sequencing and a compartment specific metabolomics approach were applied to analyze the response of an antibody (mAB) producing CHO cell line upon osmotic shift (280 → 430 mOsmol kg(-1) ). Hyperosmotic culture conditions caused a ∼2.6-fold increase of specific ATP formation rates together with a ∼1.7-fold rise in cytosolic and mitochondrial ATP-pools, thus showing increased ATP supply. mRNA expression analysis identified several genes encoding glycosylated proteins with strictly tissue related function. In addition, hyperosmotic culture conditions induced an upregulation of miR-132-3p, miR-132-5p, miR-182, miR-183, miR-194, miR-215-3p, miR-215-5p which have all been related to cell cycle arrest/proliferation in cancer studies. In relation to a previous independent CHO study miR-183 may be the most promising target to enhance qp by stable overexpression. Furthermore, deletion of genes with presumably dispensable function in suspension growing CHO cells may enhance mAB formation by increased ATP levels.
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Affiliation(s)
- Jennifer Pfizenmaier
- University of Stuttgart, Institute of Biochemical Engineering, Stuttgart, Germany
| | - Lisa Junghans
- University of Stuttgart, Institute of Biochemical Engineering, Stuttgart, Germany
| | - Attila Teleki
- University of Stuttgart, Institute of Biochemical Engineering, Stuttgart, Germany
| | - Ralf Takors
- University of Stuttgart, Institute of Biochemical Engineering, Stuttgart, Germany.
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Bedoya-López A, Estrada K, Sanchez-Flores A, Ramírez OT, Altamirano C, Segovia L, Miranda-Ríos J, Trujillo-Roldán MA, Valdez-Cruz NA. Effect of Temperature Downshift on the Transcriptomic Responses of Chinese Hamster Ovary Cells Using Recombinant Human Tissue Plasminogen Activator Production Culture. PLoS One 2016; 11:e0151529. [PMID: 26991106 PMCID: PMC4798216 DOI: 10.1371/journal.pone.0151529] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 02/28/2016] [Indexed: 12/30/2022] Open
Abstract
Recombinant proteins are widely used as biopharmaceuticals, but their production by mammalian cell culture is expensive. Hence, improvement of bioprocess productivity is greatly needed. A temperature downshift (TDS) from 37°C to 28–34°C is an effective strategy to expand the productive life period of cells and increase their productivity (qp). Here, TDS in Chinese hamster ovary (CHO) cell cultures, initially grown at 37°C and switched to 30°C during the exponential growth phase, resulted in a 1.6-fold increase in the qp of recombinant human tissue plasminogen activator (rh-tPA). The transcriptomic response using next-generation sequencing (NGS) was assessed to characterize the cellular behavior associated with TDS. A total of 416 (q > 0.8) and 3,472 (q > 0.9) differentially expressed transcripts, with more than a 1.6-fold change at 24 and 48 h post TDS, respectively, were observed in cultures with TDS compared to those at constant 37°C. In agreement with the extended cell survival resulting from TDS, transcripts related to cell growth arrest that controlled cell proliferation without the activation of the DNA damage response, were differentially expressed. Most upregulated genes were related to energy metabolism in mitochondria, mitochondrial biogenesis, central metabolism, and avoidance of apoptotic cell death. The gene coding for rh-tPA was not differentially expressed, but fluctuations were detected in the transcripts encoding proteins involved in the secretory machinery, particularly in glycosylation. Through NGS the dynamic processes caused by TDS were assessed in this biological system.
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Affiliation(s)
- Andrea Bedoya-López
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Karel Estrada
- Unidad Universitaria de Apoyo Bioinformático, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor. México
| | - Alejandro Sanchez-Flores
- Unidad Universitaria de Apoyo Bioinformático, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor. México
| | - Octavio T. Ramírez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor. México
| | - Claudia Altamirano
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Lorenzo Segovia
- Departamento de Ingeniería Celular y Biocatálisis. Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor. México
| | - Juan Miranda-Ríos
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Mauricio A. Trujillo-Roldán
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Norma A. Valdez-Cruz
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
- * E-mail:
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Sommeregger W, Mayrhofer P, Steinfellner W, Reinhart D, Henry M, Clynes M, Meleady P, Kunert R. Proteomic differences in recombinant CHO cells producing two similar antibody fragments. Biotechnol Bioeng 2016; 113:1902-12. [PMID: 26913574 PMCID: PMC4985663 DOI: 10.1002/bit.25957] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 11/25/2015] [Accepted: 02/14/2016] [Indexed: 12/28/2022]
Abstract
Chinese hamster ovary (CHO) cells are the most commonly used mammalian hosts for the production of biopharmaceuticals. To overcome unfavorable features of CHO cells, a lot of effort is put into cell engineering to improve phenotype. “Omics” studies investigating elevated growth rate and specific productivities as well as extracellular stimulus have already revealed many interesting engineering targets. However, it remains largely unknown how physicochemical properties of the recombinant product itself influence the host cell. In this study, we used quantitative label‐free LC‐MS proteomic analyses to investigate product‐specific proteome differences in CHO cells producing two similar antibody fragments. We established recombinant CHO cells producing the two antibodies, 3D6 and 2F5, both as single‐chain Fv‐Fc homodimeric antibody fragments (scFv‐Fc). We applied three different vector strategies for transgene delivery (i.e., plasmid, bacterial artificial chromosome, recombinase‐mediated cassette exchange), selected two best performing clones from transgene variants and transgene delivery methods and investigated three consecutively passaged cell samples by label‐free proteomic analysis. LC‐MS‐MS profiles were compared in several sample combinations to gain insights into different aspects of proteomic changes caused by overexpression of two different heterologous proteins. This study suggests that not only the levels of specific product secretion but the product itself has a large impact on the proteome of the cell. Biotechnol. Bioeng. 2016;113: 1902–1912. © 2016 The Authors. Biotechnology and Bioengineering Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Wolfgang Sommeregger
- Vienna Institute of BioTechnology (VIBT), University of Natural Resources and Life Sciences, Muthgasse 18, B, 5th Floor, 1190 Vienna, Austria.,Polymun Scientific GmbH, Klosterneuburg, Austria.,Bilfinger Industrietechnik Salzburg GmbH, Salzburg, Austria
| | - Patrick Mayrhofer
- Vienna Institute of BioTechnology (VIBT), University of Natural Resources and Life Sciences, Muthgasse 18, B, 5th Floor, 1190 Vienna, Austria
| | - Willibald Steinfellner
- Vienna Institute of BioTechnology (VIBT), University of Natural Resources and Life Sciences, Muthgasse 18, B, 5th Floor, 1190 Vienna, Austria
| | - David Reinhart
- Vienna Institute of BioTechnology (VIBT), University of Natural Resources and Life Sciences, Muthgasse 18, B, 5th Floor, 1190 Vienna, Austria
| | - Michael Henry
- National Institute for Cellular Biotechnology (NICB), Dublin City University, Dublin 9, Ireland
| | - Martin Clynes
- National Institute for Cellular Biotechnology (NICB), Dublin City University, Dublin 9, Ireland
| | - Paula Meleady
- National Institute for Cellular Biotechnology (NICB), Dublin City University, Dublin 9, Ireland.
| | - Renate Kunert
- Vienna Institute of BioTechnology (VIBT), University of Natural Resources and Life Sciences, Muthgasse 18, B, 5th Floor, 1190 Vienna, Austria.
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Darja O, Stanislav M, Saša S, Andrej F, Lea B, Branka J. Responses of CHO cell lines to increased pCO2 at normal (37 °C) and reduced (33 °C) culture temperatures. J Biotechnol 2015; 219:98-109. [PMID: 26707809 DOI: 10.1016/j.jbiotec.2015.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 11/07/2015] [Accepted: 12/11/2015] [Indexed: 12/12/2022]
Abstract
The correlation between dissolved carbon dioxide (pCO2) and cell growth, cell metabolism, productivity and product quality has often been reported. However, since pCO2 values in bioprocesses always vary concurrently with other bioprocess variables, it is very difficult to distinguish only the effect of pCO2. The aim of our work was to investigate further the specific effect of pCO2 and cell response on a proteome level. Proteome responses of three different CHO-Der3 cell lines in the exponential growth phase at normal (37 °C) and reduced (33 °C) culture temperatures, with normal (10%) and increased (20%) pCO2, were studied by comparative proteomic analysis (2D-DIGE). Cell viability and cell density, and the concentration of glucose, glutamine and lactate monitored over 72-h cultures showed that elevated pCO2 did not affect cell viability or productivity at either culture temperature, while metabolic activity was reduced. The specific metabolic profile also indicated altered glucose metabolism toward a less efficient anaerobic metabolism. Two-way ANOVA of proteomic data discriminated many more pCO2-specific changes in protein abundance (p<0.01) at 33 °C than at 37 °C and PCA analysis was able to distinguish clusters distinguishing cell lines and culture conditions at low temperature and elevated pCO2, indicating substantial proteome changes under these culture conditions. Cell sensitivity to increased pCO2 at the lower temperature was further confirmed by a significantly increased abundance of twelve proteins involved in anti- oxidative mechanisms and increased abundance of six proteins involved in glycolysis, including L-lactate dehydrogenase. Proteomic results support the metabolic data and the proposed pCO2 invoked metabolic switch toward anaerobic pathways. Anti- oxidative mechanisms, together with the anaerobic metabolism, allow the cells to detoxify while maintaining sufficient energy levels to preserve their vitality and functionality. This study provides further insight into the proteome responses of CHO cell lines to increased pCO2 at the two culture temperatures.
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Affiliation(s)
| | - Mandelc Stanislav
- Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia.
| | | | | | - Bojić Lea
- Lek Pharmaceuticals d.d., 1000 Ljubljana, Slovenia.
| | - Javornik Branka
- Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia.
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Vergara M, Berrios J, Martínez I, Díaz-Barrera A, Acevedo C, Reyes JG, Gonzalez R, Altamirano C. Endoplasmic Reticulum-Associated rht-PA Processing in CHO Cells: Influence of Mild Hypothermia and Specific Growth Rates in Batch and Chemostat Cultures. PLoS One 2015; 10:e0144224. [PMID: 26659083 PMCID: PMC4676689 DOI: 10.1371/journal.pone.0144224] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 11/16/2015] [Indexed: 12/11/2022] Open
Abstract
Background Chinese hamster ovary (CHO) cells are the main host for producing recombinant proteins with human therapeutic applications mainly because of their capability to perform proper folding and glycosylation processes. In addition, mild hypothermia is one of the main strategies for maximising the productivity of these systems. However, little information is available on the effect of culture temperature on the folding and degradation processes of recombinant proteins that takes place in the endoplasmic reticulum. Methods In order to evaluate the effect of the mild hypothermia on processing/endoplasmatic reticulum-associated degradation (ERAD) processes, batch cultures of CHO cells producing recombinant human tissue plasminogen activator (rht-PA) were carried out at two temperatures (37°C and 33°C) and treated with specific inhibitors of glycosylation and ERAD I (Ubiquitin/Proteasome system) or ERAD II (Autophagosoma/Lisosomal system) pathways. The effect of mild hypothermia was analysed separately from its indirect effect on specific cell growth rate. To do this, chemostat cultures were carried out at the same incubation conditions as the batch cultures, controlling cell growth at high (0.017 h-1) and low (0.012 h-1) dilution rates. For a better understanding of the investigated phenomenon, cell behaviour was also analysed using principal component analysis (PCA). Results and Conclusion Results suggest that rht-PA is susceptible to degradation by both ERAD pathways studied, revealing that processing and/or ERAD processes are sensitive to temperature cultivation in batch culture. Moreover, by isolating the effect of culture temperature from the effect of cell growth rate verifyed by using chemostat cultures, we have found that processing and/or ERAD processes are more sensitive to reduction in specific growth rate than low temperature, and that temperature reduction may have a positive effect on protein processing. Interestingly, PCA indicated that the integrated performance displayed by CHO cells is modulated predominantly by specific growth rate, indicating that the culture temperature has a lower weighted effect within the range of conditions evaluated in this work.
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Affiliation(s)
- Mauricio Vergara
- Institute of Chemistry, Pontificia Universidad Católica de Valparaíso, Av. Universidad 330, Curauma, Chile
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, 4059, Chile
| | - Julio Berrios
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, 4059, Chile
| | - Irene Martínez
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, 4059, Chile
| | - Alvaro Díaz-Barrera
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, 4059, Chile
| | - Cristian Acevedo
- Biotechnology Center “Dr. Daniel Alkalay Lowitt”, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile
| | - Juan G. Reyes
- Institute of Chemistry, Pontificia Universidad Católica de Valparaíso, Av. Universidad 330, Curauma, Chile
| | - Ramon Gonzalez
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas, United States of America
- Department of Bioengineering, Rice University, Houston, Texas, United States of America
| | - Claudia Altamirano
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, 4059, Chile
- CREAS CONICYT Regional GORE Valparaíso R0GI1004. Av. Universidad, Curauma, Chile
- * E-mail:
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Abbott WM, Middleton B, Kartberg F, Claesson J, Roth R, Fisher D. Optimisation of a simple method to transiently transfect a CHO cell line in high-throughput and at large scale. Protein Expr Purif 2015; 116:113-9. [DOI: 10.1016/j.pep.2015.08.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 08/13/2015] [Accepted: 08/14/2015] [Indexed: 12/12/2022]
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Emmerling VV, Fischer S, Stiefel F, Holzmann K, Handrick R, Hesse F, Hörer M, Kochanek S, Otte K. Temperature-sensitive miR-483 is a conserved regulator of recombinant protein and viral vector production in mammalian cells. Biotechnol Bioeng 2015; 113:830-41. [DOI: 10.1002/bit.25853] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 09/15/2015] [Accepted: 10/08/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Verena V. Emmerling
- Department of Gene Therapy; Ulm University; Ulm Germany
- Rentschler Biotechnologie GmbH; Erwin-Rentschler-Str. 21; Laupheim Germany
| | - Simon Fischer
- Institute of Applied Biotechnology; Biberach University of Applied Sciences; Hubertus-Liebrecht-Str. 35 88400 Biberach Germany
| | - Fabian Stiefel
- Institute of Applied Biotechnology; Biberach University of Applied Sciences; Hubertus-Liebrecht-Str. 35 88400 Biberach Germany
| | | | - René Handrick
- Institute of Applied Biotechnology; Biberach University of Applied Sciences; Hubertus-Liebrecht-Str. 35 88400 Biberach Germany
| | - Friedemann Hesse
- Institute of Applied Biotechnology; Biberach University of Applied Sciences; Hubertus-Liebrecht-Str. 35 88400 Biberach Germany
| | - Markus Hörer
- Rentschler Biotechnologie GmbH; Erwin-Rentschler-Str. 21; Laupheim Germany
- VBBio Consultant; Auf dem Berg 17; Laupheim Germany
| | | | - Kerstin Otte
- Institute of Applied Biotechnology; Biberach University of Applied Sciences; Hubertus-Liebrecht-Str. 35 88400 Biberach Germany
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Chen C, Le H, Goudar CT. An automated RNA-Seq analysis pipeline to identify and visualize differentially expressed genes and pathways in CHO cells. Biotechnol Prog 2015; 31:1150-62. [PMID: 26150012 DOI: 10.1002/btpr.2137] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 05/06/2015] [Indexed: 02/03/2023]
Abstract
Recent advances in RNA-Seq based comparative transcriptomics have opened up a unique opportunity to understand the mechanisms of different phenotypes in bioprocessing-related cell lines including Chinese hamster ovary (CHO) cells. However, simple and powerful tools are needed to translate large data sets into biologically relevant information that can be leveraged for genetic engineering and cell culture medium and process development. While tools exist to perform specific tasks associated with transcriptomics analysis, integrated end to end solutions that span the entire spectrum of raw data processing to visualization of gene expression changes on canonical pathways are rare. Additionally, these are not automated and require substantial user intervention. To address this gap, we have developed an automated RNA-Seq analysis pipeline in R which leverages the latest public domain statistical advances in transcriptomics data analysis. This pipeline reads RNA-Seq gene count data, identifies differentially expressed genes and differentially expressed pathways, and provides multiple intuitive visualizations as outputs. By using two publicly available CHO RNA-Seq datasets, we have demonstrated the utility of this pipeline. Subsequently, this pipeline was used to demonstrate transcriptomic similarity between laboratory- and pilot-scale bioreactors, helping make a case for the suitability of the lab-scale bioreactor as a scaled-down model. Automated end to end RNA-Seq data analysis approaches such as the one presented in this study will shorten the time required from acquiring sequencing data to biological interpretation of the results and can help accelerate the adoption of RNA-Seq analysis and thus mechanism-driven approaches for cell line and bioprocess optimization.
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Affiliation(s)
- Chun Chen
- Drug Substance Technologies, Process Development, Amgen Inc., 1 Amgen Center Dr., Thousand Oaks, CA, 91320
| | - Huong Le
- Drug Substance Technologies, Process Development, Amgen Inc., 1 Amgen Center Dr., Thousand Oaks, CA, 91320
| | - Chetan T Goudar
- Drug Substance Technologies, Process Development, Amgen Inc., 1 Amgen Center Dr., Thousand Oaks, CA, 91320
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Ito A, Nagai M, Tajino J, Yamaguchi S, Iijima H, Zhang X, Aoyama T, Kuroki H. Culture temperature affects human chondrocyte messenger RNA expression in monolayer and pellet culture systems. PLoS One 2015; 10:e0128082. [PMID: 26010859 PMCID: PMC4444092 DOI: 10.1371/journal.pone.0128082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 04/22/2015] [Indexed: 11/19/2022] Open
Abstract
Cell-based therapy has been explored for articular cartilage regeneration. Autologous chondrocyte implantation is a promising cell-based technique for repairing articular cartilage defects. However, there are several issues such as chondrocyte de-differentiation. While numerous studies have been designed to overcome some of these issues, only a few have focused on the thermal environment that can affect chondrocyte metabolism and phenotype. In this study, the effects of different culture temperatures on human chondrocyte metabolism- and phenotype-related gene expression were investigated in 2D and 3D environments. Human chondrocytes were cultured in a monolayer or in a pellet culture system at three different culture temperatures (32°C, 37°C, and 41°C) for 3 days. The results showed that the total RNA level, normalized to the threshold cycle value of internal reference genes, was higher at lower temperatures in both culture systems. Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and citrate synthase (CS), which are involved in glycolysis and the citric acid cycle, respectively, were expressed at similar levels at 32°C and 37°C in pellet cultures, but the levels were significantly lower at 41°C. Expression of the chondrogenic markers, collagen type IIA1 (COL2A1) and aggrecan (ACAN), was higher at 37°C than at 32°C and 41°C in both culture systems. However, this phenomenon did not coincide with SRY (sex-determining region Y)-box 9 (SOX9), which is a fundamental transcription factor for chondrogenesis, indicating that a SOX9-independent pathway might be involved in this phenomenon. In conclusion, the expression of chondrocyte metabolism-related genes at 32°C was maintained or enhanced compared to that at 37°C. However, chondrogenesis-related genes were further induced at 37°C in both culture systems. Therefore, manipulating the culture temperature may be an advantageous approach for regulating human chondrocyte metabolic activity and chondrogenesis.
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Affiliation(s)
- Akira Ito
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Momoko Nagai
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Junichi Tajino
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shoki Yamaguchi
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Hirotaka Iijima
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Xiangkai Zhang
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tomoki Aoyama
- Department of Development and Rehabilitation of Motor Function, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroshi Kuroki
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- * E-mail:
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44
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Sou SN, Sellick C, Lee K, Mason A, Kyriakopoulos S, Polizzi KM, Kontoravdi C. How does mild hypothermia affect monoclonal antibody glycosylation? Biotechnol Bioeng 2015; 112:1165-76. [PMID: 25545631 DOI: 10.1002/bit.25524] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 12/15/2014] [Indexed: 01/16/2023]
Abstract
The application of mild hypothermic conditions to cell culture is a routine industrial practice used to improve recombinant protein production. However, a thorough understanding of the regulation of dynamic cellular processes at lower temperatures is necessary to enhance bioprocess design and optimization. In this study, we investigated the impact of mild hypothermia on protein glycosylation. Chinese hamster ovary (CHO) cells expressing a monoclonal antibody (mAb) were cultured at 36.5°C and with a temperature shift to 32°C during late exponential/early stationary phase. Experimental results showed higher cell viability with decreased metabolic rates. The specific antibody productivity increased by 25% at 32°C and was accompanied by a reduction in intracellular nucleotide sugar donor (NSD) concentrations and a decreased proportion of the more processed glycan structures on the mAb constant region. To better understand CHO cell metabolism at 32°C, flux balance analysis (FBA) was carried out and constrained with exometabolite data from stationary phase of cultures with or without a temperature shift. Estimated fluxomes suggested reduced fluxes of carbon species towards nucleotide and NSD synthesis and more energy was used for product formation. Expression of the glycosyltransferases that are responsible for N-linked glycan branching and elongation were significantly lower at 32°C. As a result of mild hypothermia, mAb glycosylation was shown to be affected by both NSD availability and glycosyltransferase expression. The combined experimental/FBA approach generated insight as to how product glycosylation can be impacted by changes in culture temperature. Better feeding strategies can be developed based on the understanding of the metabolic flux distribution.
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Affiliation(s)
- Si Nga Sou
- Department of Life Sciences, Imperial College London, London, U.K; Centre for Synthetic Biology and Innovation, Imperial College London, London, U.K; Department of Chemical Engineering, Centre for Process Systems Engineering, London, SW7 2AZ, U.K
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45
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Vishwanathan N, Yongky A, Johnson KC, Fu HY, Jacob NM, Le H, Yusufi FNK, Lee DY, Hu WS. Global insights into the Chinese hamster and CHO cell transcriptomes. Biotechnol Bioeng 2015; 112:965-76. [PMID: 25450749 DOI: 10.1002/bit.25513] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 10/26/2014] [Accepted: 11/25/2014] [Indexed: 12/17/2022]
Abstract
Transcriptomics is increasingly being used on Chinese hamster ovary (CHO) cells to unveil physiological insights related to their performance during production processes. The rich transcriptome data can be exploited to provide impetus for systems investigation such as modeling the central carbon metabolism or glycosylation pathways, or even building genome-scale models. To harness the power of transcriptome assays, we assembled and annotated a set of RNA-Seq data from multiple CHO cell lines and Chinese hamster tissues, and constructed a DNA microarray. The identity of genes involved in major functional pathways and their transcript levels generated in this study will serve as a reference for future studies employing kinetic models. In particular, the data on glycolysis and glycosylation pathways indicate that the variability of gene expression level among different cell lines and tissues may contribute to their differences in metabolism and glycosylation patterns. Thereby, these insights can potentially lead to opportunities for cell engineering. This repertoire of transcriptome data also enables the identification of potential sequence variants in cell lines and allows tracing of cell lineages. Overall the study is an illustration of the potential benefit of RNA-Seq that is yet to be exploited.
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Affiliation(s)
- Nandita Vishwanathan
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue S.E., Minneapolis, Minnesota, 55455-0132
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46
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Vishwanathan N, Le H, Le T, Hu WS. Advancing biopharmaceutical process science through transcriptome analysis. Curr Opin Biotechnol 2014; 30:113-9. [DOI: 10.1016/j.copbio.2014.06.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 06/13/2014] [Accepted: 06/13/2014] [Indexed: 01/02/2023]
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47
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Qian Y, Xing Z, Lee S, Mackin NA, He A, Kayne PS, He Q, Qian NX, Li ZJ. Hypoxia influences protein transport and epigenetic repression of CHO cell cultures in shake flasks. Biotechnol J 2014; 9:1413-24. [DOI: 10.1002/biot.201400315] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 09/15/2014] [Accepted: 09/29/2014] [Indexed: 11/08/2022]
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48
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Du Z, Treiber D, McCarter JD, Fomina-Yadlin D, Saleem RA, McCoy RE, Zhang Y, Tharmalingam T, Leith M, Follstad BD, Dell B, Grisim B, Zupke C, Heath C, Morris AE, Reddy P. Use of a small molecule cell cycle inhibitor to control cell growth and improve specific productivity and product quality of recombinant proteins in CHO cell cultures. Biotechnol Bioeng 2014; 112:141-55. [PMID: 25042542 PMCID: PMC4282109 DOI: 10.1002/bit.25332] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 06/26/2014] [Accepted: 06/30/2014] [Indexed: 12/19/2022]
Abstract
The continued need to improve therapeutic recombinant protein productivity has led to ongoing assessment of appropriate strategies in the biopharmaceutical industry to establish robust processes with optimized critical variables, that is, viable cell density (VCD) and specific productivity (product per cell, qP). Even though high VCD is a positive factor for titer, uncontrolled proliferation beyond a certain cell mass is also undesirable. To enable efficient process development to achieve consistent and predictable growth arrest while maintaining VCD, as well as improving qP, without negative impacts on product quality from clone to clone, we identified an approach that directly targets the cell cycle G1-checkpoint by selectively inhibiting the function of cyclin dependent kinases (CDK) 4/6 with a small molecule compound. Results from studies on multiple recombinant Chinese hamster ovary (CHO) cell lines demonstrate that the selective inhibitor can mediate a complete and sustained G0/G1 arrest without impacting G2/M phase. Cell proliferation is consistently and rapidly controlled in all recombinant cell lines at one concentration of this inhibitor throughout the production processes with specific productivities increased up to 110 pg/cell/day. Additionally, the product quality attributes of the mAb, with regard to high molecular weight (HMW) and glycan profile, are not negatively impacted. In fact, high mannose is decreased after treatment, which is in contrast to other established growth control methods such as reducing culture temperature. Microarray analysis showed major differences in expression of regulatory genes of the glycosylation and cell cycle signaling pathways between these different growth control methods. Overall, our observations showed that cell cycle arrest by directly targeting CDK4/6 using selective inhibitor compound can be utilized consistently and rapidly to optimize process parameters, such as cell growth, qP, and glycosylation profile in recombinant antibody production cultures.
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Affiliation(s)
- Zhimei Du
- Cell Sciences and Technology, Amgen Inc., 1201 Amgen Court West, Seattle, Washington.
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49
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Farrell A, McLoughlin N, Milne JJ, Marison IW, Bones J. Application of Multi-Omics Techniques for Bioprocess Design and Optimization in Chinese Hamster Ovary Cells. J Proteome Res 2014; 13:3144-59. [DOI: 10.1021/pr500219b] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Amy Farrell
- Characterisation
and Comparability Laboratory, NIBRT − The National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock, Co. Dublin, Ireland
| | - Niaobh McLoughlin
- Characterisation
and Comparability Laboratory, NIBRT − The National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock, Co. Dublin, Ireland
| | - John J. Milne
- Characterisation
and Comparability Laboratory, NIBRT − The National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock, Co. Dublin, Ireland
| | - Ian W. Marison
- Laboratory
of Integrated Bioprocessing, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Jonathan Bones
- Characterisation
and Comparability Laboratory, NIBRT − The National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock, Co. Dublin, Ireland
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50
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Vergara M, Becerra S, Berrios J, Osses N, Reyes J, Rodríguez-Moyá M, Gonzalez R, Altamirano C. Differential effect of culture temperature and specific growth rate on CHO cell behavior in chemostat culture. PLoS One 2014; 9:e93865. [PMID: 24699760 PMCID: PMC3974816 DOI: 10.1371/journal.pone.0093865] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 03/04/2014] [Indexed: 12/03/2022] Open
Abstract
Mild hypothermia condition in mammalian cell culture technology has been one of the main focuses of research for the development of breeding strategies to maximize productivity of these production systems. Despite the large number of studies that show positive effects of mild hypothermia on specific productivity of r-proteins, no experimental approach has addressed the indirect effect of lower temperatures on specific cell growth rate, nor how this condition possibly affects less specific productivity of r-proteins. To separately analyze the effects of mild hypothermia and specific growth rate on CHO cell metabolism and recombinant human tissue plasminogen activator productivity as a model system, high dilution rate (0.017 h−1) and low dilution rate (0.012 h−1) at two cultivation temperatures (37 and 33°C) were evaluated using chemostat culture. The results showed a positive effect on the specific productivity of r-protein with decreasing specific growth rate at 33°C. Differential effect was achieved by mild hypothermia on the specific productivity of r-protein, contrary to the evidence reported in batch culture. Interestingly, reduction of metabolism could not be associated with a decrease in culture temperature, but rather with a decrease in specific growth rate.
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Affiliation(s)
- Mauricio Vergara
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaiíso, Valparaíso, Chile
| | - Silvana Becerra
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaiíso, Valparaíso, Chile
- CREAS CONICYT-REGIONAL, GORE Valparaíso, Valparaíso, Chile
| | - Julio Berrios
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaiíso, Valparaíso, Chile
| | - Nelson Osses
- Institute of Chemistry, Pontificia Universidad Católica de Valparaiíso, Valparaíso, Chile
| | - Juan Reyes
- Institute of Chemistry, Pontificia Universidad Católica de Valparaiíso, Valparaíso, Chile
| | - María Rodríguez-Moyá
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas, United States of America
| | - Ramon Gonzalez
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas, United States of America
- Department of Bioengineering, Rice University, Houston, Texas, United States of America
| | - Claudia Altamirano
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaiíso, Valparaíso, Chile
- CREAS CONICYT-REGIONAL, GORE Valparaíso, Valparaíso, Chile
- * E-mail:
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