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Puranik A, Saldanha M, Chirmule N, Dandekar P, Jain R. Advanced strategies in glycosylation prediction and control during biopharmaceutical development: Avenues toward Industry 4.0. Biotechnol Prog 2022; 38:e3283. [PMID: 35752935 DOI: 10.1002/btpr.3283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/31/2022] [Accepted: 06/17/2022] [Indexed: 11/09/2022]
Abstract
Glycosylation has been shown to define the safety and efficacy of biopharmaceuticals, thus classified as a critical quality attribute. However, controlling glycan heterogeneity has always been a major challenge owing to the multi-variate factors that govern the glycosylation process. Conventional approaches for controlling glycosylation such as gene editing and metabolic control have succeeded in obtaining desired glycan profiles in accordance with the Quality by Design paradigm. Nonetheless, the development of smart algorithms and omics-enabled complete cell characterization have made it possible to predict glycan profiles beforehand, and manipulate process variables accordingly. This review thus discusses the various approaches available for control and prediction of glycosylation in biopharmaceuticals. Further, the futuristic goal of integrating such technologies is discussed in order to attain an automated and digitized continuous bioprocess for control of glycosylation. Given, control of a process as complex as glycosylation requires intense monitoring intervention, we examine the current technologies that enable automation. Finally, we discuss the challenges and the technological gap that currently limits incorporation of an automated process in routine bio-manufacturing, with a glimpse into the economic bearing. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Amita Puranik
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, India
| | - Marianne Saldanha
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, India
| | | | - Prajakta Dandekar
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai, India
| | - Ratnesh Jain
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, India
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Komuczki D, Dutra G, Gstöttner C, Dominguez-Vega E, Jungbauer A, Satzer P. Media on-demand: Continuous reconstitution of a chemically defined media directly from solids. Biotechnol Bioeng 2021; 118:3382-3394. [PMID: 33656168 PMCID: PMC8451748 DOI: 10.1002/bit.27738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/26/2021] [Accepted: 02/19/2021] [Indexed: 12/15/2022]
Abstract
Chemically defined media are reconstituted batchwise and stored in hold tanks until use. To avoid large hold tanks and batchwise production of media, we developed continuous on‐demand reconstitutions directly from solids consisting of a hopper and a screw conveyor capable of feeding dry powdered media with the required precision ±5% at low dosing rates of 0.171 g min−1. A commercially available dry powdered cell culture medium was continuously fed over a duration of 12 h into a mixer which was connected to a UV‐cell for monitoring and the media were compared to a batchwise production. A comparable amino acid, carbohydrate, and osmolality profile to a batchwise reconstitution could be obtained. Cell cultivation showed comparable performance of batch and continuous reconstitution for two CHO cell lines producing the antibodies adalimumab and trastuzumab on a small and benchtop scale. In‐depth analysis of the produced antibodies showed the same glycosylation pattern, other posttranslational profiles such as methionine oxidation and deamidation compared to batchwise reconstitution. Therefore, we conclude a continuous reconstitution of the medium results in the same quality of the product. A continuous on‐demand media reconstitution will impact the supply chain and significantly reduce the floor space necessary for preparation and storage.
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Affiliation(s)
- Daniel Komuczki
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Gregory Dutra
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Christoph Gstöttner
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Elena Dominguez-Vega
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Alois Jungbauer
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria.,Austrian Centre of Industrial Biotechnology, Vienna, Austria
| | - Peter Satzer
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria.,Austrian Centre of Industrial Biotechnology, Vienna, Austria
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Alhuthali S, Kotidis P, Kontoravdi C. Osmolality Effects on CHO Cell Growth, Cell Volume, Antibody Productivity and Glycosylation. Int J Mol Sci 2021; 22:ijms22073290. [PMID: 33804825 PMCID: PMC8037477 DOI: 10.3390/ijms22073290] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 01/17/2023] Open
Abstract
The addition of nutrients and accumulation of metabolites in a fed-batch culture of Chinese hamster ovary (CHO) cells leads to an increase in extracellular osmolality in late stage culture. Herein, we explore the effect of osmolality on CHO cell growth, specific monoclonal antibody (mAb) productivity and glycosylation achieved with the addition of NaCl or the supplementation of a commercial feed. Although both methods lead to an increase in specific antibody productivity, they have different effects on cell growth and antibody production. Osmolality modulation using NaCl up to 470 mOsm kg-1 had a consistently positive effect on specific antibody productivity and titre. The addition of the commercial feed achieved variable results: specific mAb productivity was increased, yet cell growth rate was significantly compromised at high osmolality values. As a result, Feed C addition to 410 mOsm kg-1 was the only condition that achieved a significantly higher mAb titre compared to the control. Additionally, Feed C supplementation resulted in a significant reduction in galactosylated antibody structures. Cell volume was found to be positively correlated to osmolality; however, osmolality alone could not account for observed changes in average cell diameter without considering cell cycle variations. These results help delineate the overall effect of osmolality on titre and highlight the potentially negative effect of overfeeding on cell growth.
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W Eyster T, Talwar S, Fernandez J, Foster S, Hayes J, Allen R, Reidinger S, Wan B, Ji X, Aon J, Patel P, Ritz DB. Tuning monoclonal antibody galactosylation using Raman spectroscopy-controlled lactic acid feeding. Biotechnol Prog 2020; 37:e3085. [PMID: 32975043 DOI: 10.1002/btpr.3085] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/10/2020] [Accepted: 09/15/2020] [Indexed: 01/30/2023]
Abstract
A key aspect of large-scale production of biotherapeutics is a well-designed and consistently-executed upstream cell culture process. Process analytical technology tools provide enhanced monitoring and control capabilities to support consistent process execution, and also have potential to aid in maintenance of product quality at desired levels. One such tool, Raman spectroscopy, has matured as a useful technique to achieve real-time monitoring and control of key cell culture process attributes. We developed a Raman spectroscopy-based nutrient control strategy to enable dual control of lactate and glucose levels for a fed-batch CHO cell culture process for monoclonal antibody (mAb) production. To achieve this, partial least squares-based chemometric models for real-time prediction of glucose and lactate concentrations were developed and deployed in feedback control loops. In particular, feeding of lactic acid post-metabolic shift was investigated based on previous work that has shown the impact of lactate levels on ammonium as well as mAb product quality. Three feeding strategies were assessed for impact on cell metabolism, productivity, and product quality: bolus-fed glucose, glucose control at 4 g/L, or simultaneous glucose control at 4 g/L and lactate control at 2 g/L. The third feeding strategy resulted in a significant reduction in ammonium levels (68%) while increasing mAb galactosylation levels by approximately 50%. This work demonstrated that when deployed in a cell culture process, Raman spectroscopy is an effective technique for simultaneous control of multiple nutrient feeds, and that lactic acid feeding can have a positive impact on both cell metabolism and mAb product quality.
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Affiliation(s)
- Thomas W Eyster
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Sameer Talwar
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Janice Fernandez
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Shelby Foster
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - James Hayes
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Randal Allen
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Scot Reidinger
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Boyong Wan
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Xiaodan Ji
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Juan Aon
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Pramthesh Patel
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
| | - Diana B Ritz
- Microbial & Cell Culture Development, GlaxoSmithKline, King of Prussia, Pennsylvania, USA
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Schmidt C, Seibel R, Wehsling M, Le Mignon M, Wille G, Fischer M, Zimmer A. Keto leucine and keto isoleucine are bioavailable precursors of their respective amino acids in cell culture media. J Biotechnol 2020; 321:1-12. [DOI: 10.1016/j.jbiotec.2020.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 01/13/2023]
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Bertrand V, Karst DJ, Bachmann A, Cantalupo K, Soos M, Morbidelli M. Transcriptome and proteome analysis of steady-state in a perfusion CHO cell culture process. Biotechnol Bioeng 2019; 116:1959-1972. [PMID: 30997936 DOI: 10.1002/bit.26996] [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: 05/11/2018] [Revised: 01/31/2019] [Accepted: 03/28/2019] [Indexed: 01/05/2023]
Abstract
Long-term continuous protein production can be reached by perfusion operation. Through the continuous removal of waste metabolites and supply of nutrients, steady-state (SS) conditions are achieved after a certain transient period, where the conditions inside the reactor are not only uniform in space but also constant in time. Such stable conditions may have beneficial influences on the reduction of product heterogeneities. In this study, we investigated the impact of perfusion cultivation on the intracellular physiological state of a CHO cell line producing a monoclonal antibody (mAb) by global transcriptomics and proteomics. Despite stable viable cell density was maintained right from the beginning of the cultivation time, productivity decrease, and a transition phase for metabolites and product quality was observed before reaching SS conditions. These were traced back to three sources of transient behaviors being hydrodynamic flow rates, intracellular dynamics of gene expression as well as metabolism and cell line instability, superimposing each other. However, 99.4% of all transcripts and proteins reached SS during the first week or were at SS from the beginning. These results demonstrate that the stable extracellular conditions of perfusion lead to SS also of the cellular level.
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Affiliation(s)
- Vania Bertrand
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Daniel J Karst
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Alessia Bachmann
- RBM S.p.A. Istituto di Ricerche Biomediche A.Marxer, Merck, Rome, Italy
| | - Katia Cantalupo
- RBM S.p.A. Istituto di Ricerche Biomediche A.Marxer, Merck, Rome, Italy
| | - Miroslav Soos
- Department of Chemical Engineering, University of Chemistry and Technology, Technicka 5, 166 28, Prague, Czech Republic
| | - Massimo Morbidelli
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
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Ehret J, Zimmermann M, Eichhorn T, Zimmer A. Impact of cell culture media additives on IgG glycosylation produced in Chinese hamster ovary cells. Biotechnol Bioeng 2019; 116:816-830. [PMID: 30552760 PMCID: PMC6590254 DOI: 10.1002/bit.26904] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/12/2018] [Accepted: 12/14/2018] [Indexed: 01/07/2023]
Abstract
Glycosylation is a key critical quality attribute for monoclonal antibodies and other recombinant proteins because of its impact on effector mechanisms and half‐life. In this study, a variety of compounds were evaluated for their ability to modulate glycosylation profiles of recombinant monoclonal antibodies produced in Chinese hamster ovary cells. Compounds were supplemented into the cell culture feed of fed‐batch experiments performed with a CHO K1 and a CHO DG44 cell line expressing a recombinant immunoglobulin G1 (IgG1). Experiments were performed in spin tubes or the ambr®15 controlled bioreactor system, and the impact of the compounds at various concentrations was determined by monitoring the glycosylation profile of the IgG and cell culture parameters, such as viable cell density, viability, and titer. Results indicate that the highest impact on mannosylation was achieved through 15 µM kifunensine supplementation leading to an 85.8% increase in high‐mannose containing species. Fucosylation was reduced by 76.1% through addition of 800 µM 2‐F‐peracetyl fucose. An increase of 40.9% in galactosylated species was achieved through the addition of 120 mM galactose in combination with 48 µM manganese and 24 µM uridine. Furthermore, 6.9% increased sialylation was detected through the addition of 30 µM dexamethasone in combination with the same manganese, uridine, and galactose mixture used to increase total galactosylation. Further compounds or combinations of additives were also efficient at achieving a smaller overall glycosylation modulation, required, for instance, during the development of biosimilars. To the best of our knowledge, no evaluation of the efficacy of such a variety of compounds in the same cell culture system has been described. The studied cell culture media additives are efficient modulators of glycosylation and are thus a valuable tool to produce recombinant glycoproteins.
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Affiliation(s)
- Janike Ehret
- Merck Life Sciences, Upstream R&D, Darmstadt, Germany
| | - Martina Zimmermann
- Merck Life Sciences, Upstream R&D, Darmstadt, Germany.,Institute for Organic Chemistry and Biochemistry, Technische Universität Darmstadt, Darmstadt, Germany
| | | | - Aline Zimmer
- Merck Life Sciences, Upstream R&D, Darmstadt, Germany
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Mellahi K, Cambay F, Brochu D, Gilbert M, Perrier M, Ansorge S, Durocher Y, Henry O. Process development for an inducible rituximab-expressing Chinese hamster ovary cell line. Biotechnol Prog 2018; 35:e2742. [PMID: 30414355 DOI: 10.1002/btpr.2742] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 10/25/2018] [Accepted: 10/31/2018] [Indexed: 12/12/2022]
Abstract
Inducible mammalian expression systems are becoming increasingly available and are not only useful for the production of cytotoxic/cytostatic products, but also confer the unique ability to uncouple the growth and production phases. In this work, we have specifically investigated how the cell culture state at the time of induction influences the cumate-inducible expression of recombinant rituximab by a GS-CHO cell line. To this end, cells grown in batch and fed-batch cultures were induced at increasing cell densities (1 to 10 × 10 6 cells/mL). In batch, the cell specific productivity and the product yield were found to reduce with increasing cell density at induction. A dynamic feeding strategy using a concentrated nutrient solution applied prior and postinduction allowed to significantly increase the integral of viable cells and led to a 3-fold increase in the volumetric productivity (1.2 g/L). The highest product yields were achieved for intermediate cell densities at induction, as cultures induced during the late exponential phase (10 × 10 6 cells/mL) were associated with a shortened production phase. The final glycosylation patterns remained however similar, irrespective of the cell density at induction. The kinetics of growth and production in a 2 L bioreactor were largely comparable to shake flasks for a similar cell density at induction. The degree of galactosylation was found to decrease over time, but the final glycan distribution at harvest was consistent to that of the shake flasks cultures. Taken together, our results provide useful insights for the rational development of fed-batch cell culture processes involving inducible CHO cells. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2742, 2019.
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Affiliation(s)
- Kahina Mellahi
- Dept. of Chemical Engineering, École Polytechnique de Montréal, Montréal, QC, H3C 3A7
| | - Florian Cambay
- Dept. of Chemical Engineering, École Polytechnique de Montréal, Montréal, QC, H3C 3A7
| | - Denis Brochu
- Human Health Therapeutics Research Center, National Research Council Canada, Ottawa, ON
| | - Michel Gilbert
- Human Health Therapeutics Research Center, National Research Council Canada, Ottawa, ON
| | - Michel Perrier
- Dept. of Chemical Engineering, École Polytechnique de Montréal, Montréal, QC, H3C 3A7
| | - Sven Ansorge
- Human Health Therapeutics Research Center, National Research Council Canada, Montréal, QC
| | - Yves Durocher
- Human Health Therapeutics Research Center, National Research Council Canada, Montréal, QC
| | - Olivier Henry
- Dept. of Chemical Engineering, École Polytechnique de Montréal, Montréal, QC, H3C 3A7
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10
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Ritacco FV, Wu Y, Khetan A. Cell culture media for recombinant protein expression in Chinese hamster ovary (CHO) cells: History, key components, and optimization strategies. Biotechnol Prog 2018; 34:1407-1426. [DOI: 10.1002/btpr.2706] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/03/2018] [Accepted: 08/06/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Frank V. Ritacco
- Biologics Process DevelopmentBristol‐Myers Squibb Pennington New Jersey United States
| | - Yongqi Wu
- Biologics Process DevelopmentBristol‐Myers Squibb Pennington New Jersey United States
| | - Anurag Khetan
- Biologics Process DevelopmentBristol‐Myers Squibb Pennington New Jersey United States
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11
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Prabhu A, Gadre R, Gadgil M. Zinc supplementation decreases galactosylation of recombinant IgG in CHO cells. Appl Microbiol Biotechnol 2018; 102:5989-5999. [PMID: 29749563 DOI: 10.1007/s00253-018-9064-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/26/2018] [Accepted: 04/27/2018] [Indexed: 01/13/2023]
Abstract
Trace element composition of culture medium can be altered to modulate glycoform of recombinant glycoproteins. In this study, we show that Zn2+ supplementation at or above 100 μM decreases galactosylation of recombinant IgG expressed in Chinese Hamster Ovary cells. This decrease in galactosylation is not due to reduced galactosyltransferase expression. This effect persists upon supplementation of galactose and uridine to the culture, indicating that it may not be due to reduced UDP-Gal availability. Measurements of galactosyltransferase activity in the cell lysate show that activity decreases with increasing Zn2+/Mn2+ ratio. This suggests that one possible explanation of the effect of Zn2+ may be reduced intracellular galactosyltransferase activity due to increase in Zn2+/Mn2+ ratio. Consistent with this, the decrease in galactosylation of IgG could be reversed by supplementation of Mn2+ (a cofactor of galactosyltransferase) which increases intracellular Mn2+ content. Measurement of total intracellular Zn2+ content, however, indicates no significant upregulation of total intracellular Zn2+ content and no significant downregulation of intracellular Mn2+ content with Zn2+ supplementation. One possible explanation could be that cellular detoxification response to higher extracellular Zn2+ concentration might lead to changes in intracellular distribution of Mn2+. In this case, Zn2+ supplementation would be expected to interfere with other known effects of Mn2+. Indeed, the previously reported increase in high mannose glycans upon Mn2+ supplementation in the absence of glucose is reversed by Zn2+ supplementation. This study also suggests the use of Mn2+ supplementation as a strategy to overcome the effect of lot-to-lot variability in trace element concentrations on galactosylation.
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Affiliation(s)
- Anuja Prabhu
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Ramchandra Gadre
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Mugdha Gadgil
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411008, India.
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12
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Bertrand V, Vogg S, Villiger TK, Stettler M, Broly H, Soos M, Morbidelli M. Proteomic analysis of micro-scale bioreactors as scale-down model for a mAb producing CHO industrial fed-batch platform. J Biotechnol 2018; 279:27-36. [PMID: 29719200 DOI: 10.1016/j.jbiotec.2018.04.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/10/2018] [Accepted: 04/22/2018] [Indexed: 12/27/2022]
Abstract
The pharmaceutical production of recombinant proteins, such as monoclonal antibodies, is rather complex and requires proper development work. Accordingly, it is essential to develop appropriate scale-down models, which can mimic the corresponding production scale. In this work, we investigated the impact of the bioreactor scale on intracellular micro-heterogeneities of a CHO cell line producing monoclonal antibodies in fed-batch mode, using a 10 mL micro-bioreactor (ambr™) scale-down model and the corresponding 300 L pilot-scale bioreactor. For each scale, we measured the time evolution of the proteome, which enabled us to compare the impact of the bioreactor scale on the intracellular processes. Nearly absolute accordance between the scales was verified by data mining methods, such as hierarchical clustering and in-detail analysis on a single protein base. The time response of principal enzymes related to N-glycosylation was discussed, emphasizing major dissimilarities between the glycan fractions adorning the heavy chain and the corresponding protein abundance. The enzyme expression displayed mainly a constant profile, whereas the resulting glycan pattern changed over time. It is concluded that the enzymatic activity is influenced by the changing environmental conditions present in the fed-batch processes leading to the observed time-dependent variation.
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Affiliation(s)
- Vania Bertrand
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Sebastian Vogg
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Thomas K Villiger
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Matthieu Stettler
- Merck, Biotech Process Sciences, Corsier-sur -Vevey, ZI B 1809, Switzerland
| | - Hervé Broly
- Merck, Biotech Process Sciences, Corsier-sur -Vevey, ZI B 1809, Switzerland
| | - Miroslav Soos
- Department of Chemical Engineering, University of Chemistry and Technology, Technicka 3, 166 28, Prague, Czech Republic.
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland.
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Sokolov M, Morbidelli M, Butté A, Souquet J, Broly H. Sequential Multivariate Cell Culture Modeling at Multiple Scales Supports Systematic Shaping of a Monoclonal Antibody Toward a Quality Target. Biotechnol J 2018; 13:e1700461. [DOI: 10.1002/biot.201700461] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 11/29/2017] [Indexed: 01/27/2023]
Affiliation(s)
- Michael Sokolov
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences; ETH Zürich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Massimo Morbidelli
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences; ETH Zürich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
| | - Alessandro Butté
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences; ETH Zürich Vladimir-Prelog-Weg 1 8093 Zurich Switzerland
- DataHow AG Vladimir-Prelog-Weg 1; 8093 Zurich Switzerland
| | - Jonathan Souquet
- Merck Serono SA, Biotech Process Sciences Route de Fenil 25; 1804 Corsier-sur-Vevey Switzerland
| | - Hervé Broly
- Merck Serono SA, Biotech Process Sciences Route de Fenil 25; 1804 Corsier-sur-Vevey Switzerland
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14
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Liu H, Nowak C, Shao M, Ponniah G, Neill A. Impact of cell culture on recombinant monoclonal antibody product heterogeneity. Biotechnol Prog 2016; 32:1103-1112. [DOI: 10.1002/btpr.2327] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/19/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Hongcheng Liu
- Product Characterization, Global Analytical and Pharmaceutical Development; Alexion Pharmaceuticals; CT06410 Cheshire
| | - Christine Nowak
- Product Characterization, Global Analytical and Pharmaceutical Development; Alexion Pharmaceuticals; CT06410 Cheshire
| | - Mei Shao
- Late Stage Upstream Development, Global Process Development; Alexion Pharmaceuticals; CT06410 Cheshire
| | - Gomathinayagam Ponniah
- Product Characterization, Global Analytical and Pharmaceutical Development; Alexion Pharmaceuticals; CT06410 Cheshire
| | - Alyssa Neill
- Product Characterization, Global Analytical and Pharmaceutical Development; Alexion Pharmaceuticals; CT06410 Cheshire
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15
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Lewis AM, Croughan WD, Aranibar N, Lee AG, Warrack B, Abu-Absi NR, Patel R, Drew B, Borys MC, Reily MD, Li ZJ. Understanding and Controlling Sialylation in a CHO Fc-Fusion Process. PLoS One 2016; 11:e0157111. [PMID: 27310468 PMCID: PMC4911072 DOI: 10.1371/journal.pone.0157111] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 05/24/2016] [Indexed: 12/13/2022] Open
Abstract
A Chinese hamster ovary (CHO) bioprocess, where the product is a sialylated Fc-fusion protein, was operated at pilot and manufacturing scale and significant variation of sialylation level was observed. In order to more tightly control glycosylation profiles, we sought to identify the cause of variability. Untargeted metabolomics and transcriptomics methods were applied to select samples from the large scale runs. Lower sialylation was correlated with elevated mannose levels, a shift in glucose metabolism, and increased oxidative stress response. Using a 5-L scale model operated with a reduced dissolved oxygen set point, we were able to reproduce the phenotypic profiles observed at manufacturing scale including lower sialylation, higher lactate and lower ammonia levels. Targeted transcriptomics and metabolomics confirmed that reduced oxygen levels resulted in increased mannose levels, a shift towards glycolysis, and increased oxidative stress response similar to the manufacturing scale. Finally, we propose a biological mechanism linking large scale operation and sialylation variation. Oxidative stress results from gas transfer limitations at large scale and the presence of oxygen dead-zones inducing upregulation of glycolysis and mannose biosynthesis, and downregulation of hexosamine biosynthesis and acetyl-CoA formation. The lower flux through the hexosamine pathway and reduced intracellular pools of acetyl-CoA led to reduced formation of N-acetylglucosamine and N-acetylneuraminic acid, both key building blocks of N-glycan structures. This study reports for the first time a link between oxidative stress and mammalian protein sialyation. In this study, process, analytical, metabolomic, and transcriptomic data at manufacturing, pilot, and laboratory scales were taken together to develop a systems level understanding of the process and identify oxygen limitation as the root cause of glycosylation variability.
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Affiliation(s)
- Amanda M. Lewis
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
- * E-mail:
| | - William D. Croughan
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
| | - Nelly Aranibar
- Research and Development, Bristol-Myers Squibb Company, Princeton, NJ, United States of America
| | - Alison G. Lee
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
| | - Bethanne Warrack
- Research and Development, Bristol-Myers Squibb Company, Princeton, NJ, United States of America
| | - Nicholas R. Abu-Absi
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
| | - Rutva Patel
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
| | - Barry Drew
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
| | - Michael C. Borys
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
| | - Michael D. Reily
- Research and Development, Bristol-Myers Squibb Company, Princeton, NJ, United States of America
| | - Zheng Jian Li
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, United States of America
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16
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Purdie JL, Kowle RL, Langland AL, Patel CN, Ouyang A, Olson DJ. Cell culture media impact on drug product solution stability. Biotechnol Prog 2016; 32:998-1008. [DOI: 10.1002/btpr.2289] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 04/20/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Jennifer L. Purdie
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company; Indianapolis IN 46285
| | - Ronald L. Kowle
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company; Indianapolis IN 46285
| | - Amie L. Langland
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company; Indianapolis IN 46285
| | - Chetan N. Patel
- Biotechnology Discovery Research, Lilly Research Laboratories, Eli Lilly and Company; Indianapolis IN 46285
| | - Anli Ouyang
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company; Indianapolis IN 46285
| | - Donald J. Olson
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company; Indianapolis IN 46285
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17
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Zhang A, Tsang VL, Markely LR, Kurt L, Huang YM, Prajapati S, Kshirsagar R. Identifying the differences in mechanisms of mycophenolic acid controlling fucose content of glycoproteins expressed in different CHO cell lines. Biotechnol Bioeng 2016; 113:2367-76. [DOI: 10.1002/bit.25995] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 02/02/2016] [Accepted: 04/14/2016] [Indexed: 12/19/2022]
Affiliation(s)
- An Zhang
- Cell Culture Development; Biogen; 5000 Davis Drive Research Triangle Park North Carolina 27709
| | - Valerie Liu Tsang
- Cell Culture Development; Biogen; 5000 Davis Drive Research Triangle Park North Carolina 27709
| | - Lam R. Markely
- Cell Culture Development; Biogen; Cambridge Massachusetts 02142
| | - Lutfiye Kurt
- Cell Culture Development; Biogen; Cambridge Massachusetts 02142
| | - Yao-Ming Huang
- Cell Culture Development; Biogen; 5000 Davis Drive Research Triangle Park North Carolina 27709
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18
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Villiger TK, Steinhoff RF, Ivarsson M, Solacroup T, Stettler M, Broly H, Krismer J, Pabst M, Zenobi R, Morbidelli M, Soos M. High-throughput profiling of nucleotides and nucleotide sugars to evaluate their impact on antibody N-glycosylation. J Biotechnol 2016; 229:3-12. [PMID: 27131894 DOI: 10.1016/j.jbiotec.2016.04.039] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 04/16/2016] [Accepted: 04/20/2016] [Indexed: 01/25/2023]
Abstract
Recent advances in miniaturized cell culture systems have facilitated the screening of media additives on productivity and protein quality attributes of mammalian cell cultures. However, intracellular components are not routinely measured due to the limited throughput of available analytical techniques. In this work, time profiling of intracellular nucleotides and nucleotide sugars of CHO-S cell fed-batch processes in a micro-scale bioreactor system was carried out using a recently developed high-throughput method based on matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry (TOF-MS). Supplementation of various media additives significantly altered the intracellular nucleotides and nucleotide sugars that are inextricably linked to the process of glycosylation. The results revealed that UDP-Gal synthesis appeared to be particularly limiting whereas the impact of elevated UDP-GlcNAc and GDP-Fuc levels on the final glycosylation patterns was only marginally important. In contrast, manganese and asparagine supplementation altered the glycan profiles without affecting intracellular components. The combination of miniaturized cell cultures and high-throughput analytical techniques serves therefore as a useful tool for future quality driven media optimization studies.
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Affiliation(s)
- Thomas K Villiger
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH- 8093 Zurich, Switzerland
| | - Robert F Steinhoff
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Marija Ivarsson
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH- 8093 Zurich, Switzerland
| | - Thomas Solacroup
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, ZI B, CH-1809 Fenil-sur-Corsier, Switzerland
| | - Matthieu Stettler
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, ZI B, CH-1809 Fenil-sur-Corsier, Switzerland
| | - Hervé Broly
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, ZI B, CH-1809 Fenil-sur-Corsier, Switzerland
| | - Jasmin Krismer
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Martin Pabst
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Renato Zenobi
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH- 8093 Zurich, Switzerland
| | - Miroslav Soos
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, CH- 8093 Zurich, Switzerland; Department of Chemical Engineering, University of Chemistry and Technology, Technicka 5, 166 28 Prague, Czech Republic.
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19
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Jefferis R. Posttranslational Modifications and the Immunogenicity of Biotherapeutics. J Immunol Res 2016; 2016:5358272. [PMID: 27191002 PMCID: PMC4848426 DOI: 10.1155/2016/5358272] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 03/20/2016] [Indexed: 12/23/2022] Open
Abstract
Whilst the amino acid sequence of a protein is determined by its gene sequence, the final structure and function are determined by posttranslational modifications (PTMs), including quality control (QC) in the endoplasmic reticulum (ER) and during passage through the Golgi apparatus. These processes are species and cell specific and challenge the biopharmaceutical industry when developing a production platform for the generation of recombinant biologic therapeutics. Proteins and glycoproteins are also subject to chemical modifications (CMs) both in vivo and in vitro. The individual is naturally tolerant to molecular forms of self-molecules but nonself variants can provoke an immune response with the generation of anti-drug antibodies (ADA); aggregated forms can exhibit enhanced immunogenicity and QC procedures are developed to avoid or remove them. Monoclonal antibody therapeutics (mAbs) are a special case because their purpose is to bind the target, with the formation of immune complexes (ICs), a particular form of aggregate. Such ICs may be removed by phagocytic cells that have antigen presenting capacity. These considerations may frustrate the possibility of ameliorating the immunogenicity of mAbs by rigorous exclusion of aggregates from drug product. Alternate strategies for inducing immunosuppression or tolerance are discussed.
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Affiliation(s)
- Roy Jefferis
- Institute of Immunology & Immunotherapy, College of Medical & Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
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20
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Sha S, Agarabi C, Brorson K, Lee DY, Yoon S. N-Glycosylation Design and Control of Therapeutic Monoclonal Antibodies. Trends Biotechnol 2016; 34:835-846. [PMID: 27016033 DOI: 10.1016/j.tibtech.2016.02.013] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 02/20/2016] [Accepted: 02/24/2016] [Indexed: 12/31/2022]
Abstract
The N-linked glycan profiles on recombinant monoclonal antibody therapeutics significantly affect antibody biological functions and are largely determined by host cell genotypes and culture conditions. A key step in bioprocess development for monoclonal antibodies (mAbs) involves optimization and control of N-glycan profiles. With pressure from pricing and biosimilars looming, more efficient and effective approaches are sought in the field of glycoengineering. Metabolic studies and mathematical modeling are two such approaches that optimize bioprocesses by better understanding and predicting glycosylation. In this review, we summarize a group of strategies currently used for glycan profile modulation and control. Metabolic analysis and mathematical modeling are then explored with an emphasis on how these two techniques can be utilized to advance glycoengineering.
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Affiliation(s)
- Sha Sha
- Biomedical Engineering and Biotechnology, University of Massachusetts Lowell, Lowell, MA 01850, USA
| | - Cyrus Agarabi
- Division of Biotechnology Review and Research II, Office of Biotechnology Products, OPQ, CDER, FDA, Silver Spring, MD, USA
| | - Kurt Brorson
- Division of Biotechnology Review and Research II, Office of Biotechnology Products, OPQ, CDER, FDA, Silver Spring, MD, USA
| | - Dong-Yup Lee
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, Singapore 117585, Singapore
| | - Seongkyu Yoon
- Biomedical Engineering and Biotechnology, University of Massachusetts Lowell, Lowell, MA 01850, USA.
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21
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Seo JS, Min BS, Kwon YB, Lee SY, Cho JM, Park KH, Yang YJ, Maeng KE, Chang SJ, Kim DI. Characteristics of human cell line, F2N78, for the production of recombinant antibody in fed-batch and perfusion cultures. J Biosci Bioeng 2016; 121:317-24. [DOI: 10.1016/j.jbiosc.2015.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 07/04/2015] [Accepted: 07/13/2015] [Indexed: 12/30/2022]
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22
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Hazeltine LB, Knueven KM, Zhang Y, Lian Z, Olson DJ, Ouyang A. Chemically defined media modifications to lower tryptophan oxidation of biopharmaceuticals. Biotechnol Prog 2015; 32:178-88. [PMID: 26560440 DOI: 10.1002/btpr.2195] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/16/2015] [Indexed: 12/16/2022]
Abstract
Oxidation of biopharmaceuticals is a major product quality issue with potential impacts on activity and immunogenicity. At Eli Lilly and Company, high tryptophan oxidation was observed for two biopharmaceuticals in development produced in Chinese hamster ovary cells. A switch from historical hydrolysate-containing media to chemically defined media with a reformulated basal powder was thought to be responsible, so mitigation efforts focused on media modification. Shake flask studies identified that increasing tryptophan, copper, and manganese and decreasing cysteine concentrations were individual approaches to lower tryptophan oxidation. When amino acid and metal changes were combined, the modified formulation had a synergistic impact that led to substantially less tryptophan oxidation for both biopharmaceuticals. Similar results were achieved in shake flasks and benchtop bioreactors, demonstrating the potential to implement these modifications at manufacturing scale. The modified formulation did not negatively impact cell growth and viability, product titer, purity, charge variants, or glycan profile. A potential mechanism of action is presented for each amino acid or metal factor based on its role in oxidation chemistry. This work served not only to mitigate the tryptophan oxidation issue in two Lilly biopharmaceuticals in development, but also to increase our knowledge and appreciation for the impact of media components on product quality.
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Affiliation(s)
- Laurie B Hazeltine
- Bioproduct Research and Development, Eli Lilly and Company, Indianapolis, IN, 46285
| | - Kristine M Knueven
- Bioproduct Research and Development, Eli Lilly and Company, Indianapolis, IN, 46285
| | - Yan Zhang
- Bioproduct Research and Development, Eli Lilly and Company, Indianapolis, IN, 46285
| | - Zhirui Lian
- Bioproduct Research and Development, Eli Lilly and Company, Indianapolis, IN, 46285
| | - Donald J Olson
- Bioproduct Research and Development, Eli Lilly and Company, Indianapolis, IN, 46285
| | - Anli Ouyang
- Bioproduct Research and Development, Eli Lilly and Company, Indianapolis, IN, 46285
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23
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Brühlmann D, Jordan M, Hemberger J, Sauer M, Stettler M, Broly H. Tailoring recombinant protein quality by rational media design. Biotechnol Prog 2015; 31:615-29. [DOI: 10.1002/btpr.2089] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/04/2015] [Indexed: 02/07/2023]
Affiliation(s)
- David Brühlmann
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, Zone Industrielle B; CH-1809 Fenil-sur-Corsier Switzerland
- Dept. of Biotechnology and Biophysics; Julius-Maximilians-Universität Würzburg, Biozentrum; Am Hubland DE-97074 Würzburg Germany
| | - Martin Jordan
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, Zone Industrielle B; CH-1809 Fenil-sur-Corsier Switzerland
| | - Jürgen Hemberger
- Inst. for Biochemical Engineering and Analytics; University of Applied Sciences Giessen; Wiesenstrasse 14, DE-35390 Giessen Germany
| | - Markus Sauer
- Dept. of Biotechnology and Biophysics; Julius-Maximilians-Universität Würzburg, Biozentrum; Am Hubland DE-97074 Würzburg Germany
| | - Matthieu Stettler
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, Zone Industrielle B; CH-1809 Fenil-sur-Corsier Switzerland
| | - Hervé Broly
- Merck Serono SA, Corsier-sur-Vevey, Biotech Process Sciences, Zone Industrielle B; CH-1809 Fenil-sur-Corsier Switzerland
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24
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García Münzer D, Ivarsson M, Usaku C, Habicher T, Soos M, Morbidelli M, Pistikopoulos E, Mantalaris A. An unstructured model of metabolic and temperature dependent cell cycle arrest in hybridoma batch and fed-batch cultures. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2014.10.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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26
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Hossler P, McDermott S, Racicot C, Chumsae C, Raharimampionona H, Zhou Y, Ouellette D, Matuck J, Correia I, Fann J, Li J. Cell culture media supplementation of uncommonly used sugars sucrose and tagatose for the targeted shifting of protein glycosylation profiles of recombinant protein therapeutics. Biotechnol Prog 2014; 30:1419-31. [DOI: 10.1002/btpr.1968] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 08/04/2014] [Indexed: 12/25/2022]
Affiliation(s)
- Patrick Hossler
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | - Sean McDermott
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | | | | | | | - Yu Zhou
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | - David Ouellette
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | - Joseph Matuck
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | - Ivan Correia
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | - John Fann
- Process Sciences-Cell Culture; AbbVie Inc.; Worcester MA 01605
| | - Jianmin Li
- Oncology Biologics; AbbVie Inc.; Redwood City CA 94063
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