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Zheng YY, Hu ZN, Zhou GH. A review: analysis of technical challenges in cultured meat production and its commercialization. Crit Rev Food Sci Nutr 2024:1-18. [PMID: 38384235 DOI: 10.1080/10408398.2024.2315447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
The cultured meat technology has developed rapidly in recent years, but there are still many technical challenges that hinder the large-scale production and commercialization of cultured meat. Firstly, it is necessary to lay the foundation for cultured meat production by obtaining seed cells and maintaining stable cell functions. Next, technologies such as bioreactors are used to expand the scale of cell culture, and three-dimensional culture technologies such as scaffold culture or 3D printing are used to construct the three-dimensional structure of cultured meat. At the same time, it can reduce production costs by developing serum-free medium suitable for cultured meat. Finally, the edible quality of cultured meat is improved by evaluating food safety and sensory flavor, and combining ethical and consumer acceptability issues. Therefore, this review fully demonstrates the current development status and existing technical challenges of the cultured meat production technology with regard to the key points described above, in order to provide research ideas for the industrial production of cultured meat.
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Affiliation(s)
- Yan-Yan Zheng
- College of Food Science and Technology, Nanjing Agricultural University, National Center of Meat Quality and Safety Nanjing, MOST, Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Nanjing, P.R. China
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Ze-Nan Hu
- College of Food Science and Technology, Nanjing Agricultural University, National Center of Meat Quality and Safety Nanjing, MOST, Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Nanjing, P.R. China
| | - Guang-Hong Zhou
- College of Food Science and Technology, Nanjing Agricultural University, National Center of Meat Quality and Safety Nanjing, MOST, Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Nanjing, P.R. China
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
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2
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Nelson L, Veling M, Farhangdoust F, Cai X, Huhn S, Soloveva V, Chang M. Transcriptomics and cell painting analysis reveals molecular and morphological features associated with fed-batch production performance in CHO recombinant clones. Biotechnol Bioeng 2023; 120:3177-3190. [PMID: 37555462 DOI: 10.1002/bit.28518] [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: 04/29/2023] [Revised: 07/14/2023] [Accepted: 07/16/2023] [Indexed: 08/10/2023]
Abstract
Stable, highly productive mammalian cells are critical for manufacturing affordable and effective biological medicines. Establishing a rational design of optimal biotherapeutic expression systems requires understanding how cells support the high demand for efficient biologics production. To that end, we performed transcriptomics and high-throughput imaging studies to identify putative genes and morphological features that underpin differences in antibody productivity among clones from a Chinese hamster ovary cell line. During log phase growth, we found that the expression of genes involved in biological processes related to cellular morphology varied significantly between clones with high specific productivity (qP > 35 pg/cell/day) and low specific productivity (qP < 20 pg/cell/day). At Day 10 of a fed-batch production run, near peak viable cell density, differences in gene expression related to metabolism, epigenetic regulation, and proliferation became prominent. Furthermore, we identified a subset of genes whose expression predicted overall productivity, including glutathione synthetase (Gss) and lactate dehydrogenase A (LDHA). Finally, we demonstrated the feasibility of cell painting coupled with high-throughput imaging to assess the morphological properties of intracellular organelles in relation to growth and productivity in fed-batch production. Our efforts lay the groundwork for systematic elucidation of clone performance using a multiomics approach that can guide future process design strategies.
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Affiliation(s)
| | | | | | - Xuezhu Cai
- Merck & Co., Inc., Rahway, New Jersey, USA
| | - Steve Huhn
- Merck & Co., Inc., Rahway, New Jersey, USA
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3
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Liang K, Luo H, Li Q. Enhancing and stabilizing monoclonal antibody production by Chinese hamster ovary (CHO) cells with optimized perfusion culture strategies. Front Bioeng Biotechnol 2023; 11:1112349. [PMID: 36741761 PMCID: PMC9895834 DOI: 10.3389/fbioe.2023.1112349] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/09/2023] [Indexed: 01/21/2023] Open
Abstract
The perfusion medium is critical in maintaining high cell concentration in cultures for the production of monoclonal antibody by Chinese hamster ovary cells. In this study, the effects of perfusion culture strategies when using different media on the process stability, product titer, and product quality were investigated in 3-L bioreactor. The results indicated that continuous perfusion could maintain higher levels of cell density, product titer, and quality in comparison with those of the intermittent perfusion culture. Next, the perfusion culture conditions with different perfusion rates and temperature reduction methods were further optimized. When combining the high perfusion rates and delayed reduction of culture temperature at day 6, the product titer reached a higher level of 16.19 g/L with the monomer relative abundant of 97.6%. In this case, the main peak of the product reached 56.3% and the total N-glycans ratio was 95.2%. To verify the effectiveness of the optimized perfusion culture in a larger scale, a 200-L bioreactor was used to perform and the final product titer reached the highest level of 16.79 g/L at day 16. Meanwhile, the product quality (monomer abundant of 97.6%, main peak of 56.3%, and N-glycans ratio of 96.5%) could also be well maintained. This study provided some guidance for the high-efficient production of monoclonal antibody by CHO cells via optimized perfusion culture strategy.
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Affiliation(s)
- Kexue Liang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Hongzhen Luo
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China,School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China,*Correspondence: Qi Li,
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4
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Xu WJ, Lin Y, Mi CL, Pang JY, Wang TY. Progress in fed-batch culture for recombinant protein production in CHO cells. Appl Microbiol Biotechnol 2023; 107:1063-1075. [PMID: 36648523 PMCID: PMC9843118 DOI: 10.1007/s00253-022-12342-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 01/18/2023]
Abstract
Nearly 80% of the approved human therapeutic antibodies are produced by Chinese Hamster Ovary (CHO) cells. To achieve better cell growth and high-yield recombinant protein, fed-batch culture is typically used for recombinant protein production in CHO cells. According to the demand of nutrients consumption, feed medium containing multiple components in cell culture can affect the characteristics of cell growth and improve the yield and quality of recombinant protein. Fed-batch optimization should have a connection with comprehensive factors such as culture environmental parameters, feed composition, and feeding strategy. At present, process intensification (PI) is explored to maintain production flexible and meet forthcoming demands of biotherapeutics process. Here, CHO cell culture, feed composition in fed-batch culture, fed-batch culture environmental parameters, feeding strategies, metabolic byproducts in fed-batch culture, chemostat cultivation, and the intensified fed-batch are reviewed. KEY POINTS: • Fed-batch culture in CHO cells is reviewed. • Fed-batch has become a common technology for recombinant protein production. • Fed batch culture promotes recombinant protein production in CHO cells.
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Affiliation(s)
- Wen-Jing Xu
- grid.412990.70000 0004 1808 322XInternational Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, 453003 Henan China ,grid.412990.70000 0004 1808 322XSchool of Pharmacy, Xinxiang Medical University, Xinxiang, 453003 Henan China
| | - Yan Lin
- grid.412990.70000 0004 1808 322XInternational Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, 453003 Henan China ,grid.412990.70000 0004 1808 322XSchool of Nursing, Xinxiang Medical University, Xinxiang, 453003 Henan China
| | - Chun-Liu Mi
- grid.412990.70000 0004 1808 322XInternational Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, 453003 Henan China
| | - Jing-Ying Pang
- grid.412990.70000 0004 1808 322XSchool of the First Clinical College, Xinxiang Medical University, Xinxiang, 453000 Henan China
| | - Tian-Yun Wang
- grid.412990.70000 0004 1808 322XInternational Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, 453003 Henan China ,grid.495434.b0000 0004 1797 4346School of medicine, Xinxiang University, Xinxiang, 453003 Henan China
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Mark JKK, Lim CSY, Nordin F, Tye GJ. Expression of mammalian proteins for diagnostics and therapeutics: a review. Mol Biol Rep 2022; 49:10593-10608. [PMID: 35674877 PMCID: PMC9175168 DOI: 10.1007/s11033-022-07651-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 05/25/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Antibodies have proven to be remarkably successful for biomedical applications. They play important roles in epidemiology and medicine from diagnostics of diseases to therapeutics, treating diseases from incessant chronic diseases such as rheumatology to pandemic outbreaks. With no end in sight for the demand for antibody products, optimizations and new techniques must be expanded to accommodate this. METHODS AND RESULTS This review discusses optimizations and techniques for antibody production through choice of discovery platforms, expression systems, cell culture mediums, and other strategies to increase expression yield. Each system has its own merits and demerits, and the strategy chosen is critical in addressing various biological aspects. CONCLUSIONS There is still insufficient evidence to validate the efficacy of some of these techniques, and further research is needed to consolidate these industrial production systems. There is no doubt that more strategies, systems, and pipelines will contribute to enhance biopharmaceutical production.
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Affiliation(s)
- Jacqueline Kar Kei Mark
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800, Penang, Minden, Malaysia
| | - Crystale Siew Ying Lim
- Department of Biotechnology, Faculty of Applied Sciences, UCSI University, No 1 Jalan Menara Gading, UCSI Heights, Taman Connaught, 56000, Kuala Lumpur, Cheras, Malaysia
| | - Fazlina Nordin
- Tissue Engineering Centre (TEC), Universiti Kebangsaan Malaysia Medical Centre (UKMMC), 56000, Kuala Lumpur, Cheras, Malaysia
| | - Gee Jun Tye
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800, Penang, Minden, Malaysia.
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6
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Li ZM, Fan ZL, Wang XY, Wang TY. Factors Affecting the Expression of Recombinant Protein and Improvement Strategies in Chinese Hamster Ovary Cells. Front Bioeng Biotechnol 2022; 10:880155. [PMID: 35860329 PMCID: PMC9289362 DOI: 10.3389/fbioe.2022.880155] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 06/01/2022] [Indexed: 01/20/2023] Open
Abstract
Recombinant therapeutic proteins (RTPs) are important parts of biopharmaceuticals. Chinese hamster ovary cells (CHO) have become the main cell hosts for the production of most RTPs approved for marketing because of their high-density suspension growth characteristics, and similar human post-translational modification patterns et al. In recent years, many studies have been performed on CHO cell expression systems, and the yields and quality of recombinant protein expression have been greatly improved. However, the expression levels of some proteins are still low or even difficult-to express in CHO cells. It is urgent further to increase the yields and to express successfully the “difficult-to express” protein in CHO cells. The process of recombinant protein expression of is a complex, involving multiple steps such as transcription, translation, folding processing and secretion. In addition, the inherent characteristics of molecular will also affect the production of protein. Here, we reviewed the factors affecting the expression of recombinant protein and improvement strategies in CHO cells.
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Affiliation(s)
- Zheng-Mei Li
- School of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang, China
| | - Zhen-Lin Fan
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang, China
- Institutes of Health Central Plain, Xinxiang Medical University, Xinxiang, China
| | - Xiao-Yin Wang
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang, China
- Department of Biochemistry and Molecular Biology, Xinxiang Medical University, Xinxiang, China
| | - Tian-Yun Wang
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang, China
- Department of Biochemistry and Molecular Biology, Xinxiang Medical University, Xinxiang, China
- *Correspondence: Tian-Yun Wang,
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Romanova N, Schmitz J, Strakeljahn M, Grünberger A, Bahnemann J, Noll T. Single-Cell Analysis of CHO Cells Reveals Clonal Heterogeneity in Hyperosmolality-Induced Stress Response. Cells 2022; 11:cells11111763. [PMID: 35681457 PMCID: PMC9179406 DOI: 10.3390/cells11111763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/18/2022] [Accepted: 05/23/2022] [Indexed: 02/04/2023] Open
Abstract
Hyperosmolality can occur during industrial fed-batch cultivation processes of Chinese hamster ovary (CHO) cells as highly concentrated feed and base solutions are added to replenish nutrients and regulate pH values. Some effects of hyperosmolality, such as increased cell size and growth inhibition, have been elucidated by previous research, but the impact of hyperosmolality and the specific effects of the added osmotic-active reagents have rarely been disentangled. In this study, CHO cells were exposed to four osmotic conditions between 300 mOsm/kg (physiologic condition) and 530 mOsm/kg (extreme hyperosmolality) caused by the addition of either high-glucose-supplemented industrial feed or mannitol as an osmotic control. We present novel single-cell cultivation data revealing heterogeneity in mass gain and cell division in response to these treatments. Exposure to extreme mannitol-induced hyperosmolality and to high-glucose-oversupplemented feed causes cell cycle termination, mtDNA damage, and mitochondrial membrane depolarization, which hints at the onset of premature stress-induced senescence. Thus, this study shows that both mannitol-induced hyperosmolality (530 mOsm/kg) and glucose overfeeding induce severe negative effects on cell growth and mitochondrial activity; therefore, they need to be considered during process development for commercial production.
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Affiliation(s)
- Nadiya Romanova
- Cell Culture Technology, Faculty of Technology, Bielefeld University, 33615 Bielefeld, Germany; (M.S.); (T.N.)
- Correspondence: ; Tel.: +49-521-106-6324
| | - Julian Schmitz
- Multiscale Bioengineering, Faculty of Technology, Bielefeld University, 33615 Bielefeld, Germany; (J.S.); (A.G.)
| | - Marie Strakeljahn
- Cell Culture Technology, Faculty of Technology, Bielefeld University, 33615 Bielefeld, Germany; (M.S.); (T.N.)
| | - Alexander Grünberger
- Multiscale Bioengineering, Faculty of Technology, Bielefeld University, 33615 Bielefeld, Germany; (J.S.); (A.G.)
| | - Janina Bahnemann
- Institute of Physics, University of Augsburg, 86159 Augsburg, Germany;
| | - Thomas Noll
- Cell Culture Technology, Faculty of Technology, Bielefeld University, 33615 Bielefeld, Germany; (M.S.); (T.N.)
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8
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Factors affecting the quality of therapeutic proteins in recombinant Chinese hamster ovary cell culture. Biotechnol Adv 2021; 54:107831. [PMID: 34480988 DOI: 10.1016/j.biotechadv.2021.107831] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 06/21/2021] [Accepted: 08/30/2021] [Indexed: 12/17/2022]
Abstract
Chinese hamster ovary (CHO) cells are the most widely used mammalian host cells for the commercial production of therapeutic proteins. Fed-batch culture is widely used to produce therapeutic proteins, including monoclonal antibodies, because of its operational simplicity and high product titer. Despite technical advances in the development of culture media and cell cultures, it is still challenging to maintain high productivity in fed-batch cultures while also ensuring good product quality. In this review, factors that affect the quality attributes of therapeutic proteins in recombinant CHO (rCHO) cell culture, such as glycosylation, charge variation, aggregation, and degradation, are summarized and categorized into three groups: culture environments, chemical additives, and host cell proteins accumulated in culture supernatants. Understanding the factors that influence the therapeutic protein quality in rCHO cell culture will facilitate the development of large-scale, high-yield fed-batch culture processes for the production of high-quality therapeutic proteins.
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9
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Klaubert SR, Chitwood DG, Dahodwala H, Williamson M, Kasper R, Lee KH, Harcum SW. Method to transfer Chinese hamster ovary (CHO) batch shake flask experiments to large-scale, computer-controlled fed-batch bioreactors. Methods Enzymol 2021; 660:297-320. [PMID: 34742394 DOI: 10.1016/bs.mie.2021.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Chinese hamster ovary (CHO) cell cultures in industry are most commonly conducted as fed-batch cultures in computer-controlled bioreactors, though most preliminary studies are conducted in fed-batch shake flasks. To improve comparability between bioreactor studies and shake flask studies, shake flask studies should be conducted as fed-batch. However, the smaller volumes and reduced control in shake flasks can impact pH and aeration, which leads to performance differences. Planning and awareness of these vessel and control differences can assist with experimental design as well as troubleshooting. This method will highlight several of the configuration and control issues that should be considered during the transitions from batch to fed-batch and shake flasks to bioreactors, as well as approaches to mitigate the differences. Furthermore, if significant differences occur between bioreactor and shake flask studies, approaches will be presented to isolate the main contributors for these differences.
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Affiliation(s)
- Stephanie R Klaubert
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, SC, United States
| | - Dylan G Chitwood
- Department of Bioengineering, Clemson University, 301 Rhodes Research Center, Clemson, SC, United States
| | - Hussain Dahodwala
- National Institute for Innovation in Manufacturing Biopharmaceuticals (NIIMBL), Newark, DE, United States
| | - Madison Williamson
- Department of Bioengineering, Clemson University, 301 Rhodes Research Center, Clemson, SC, United States
| | - Rachel Kasper
- Department of Bioengineering, Clemson University, 301 Rhodes Research Center, Clemson, SC, United States
| | - Kelvin H Lee
- Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States; Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, United States
| | - Sarah W Harcum
- Department of Bioengineering, Clemson University, 301 Rhodes Research Center, Clemson, SC, United States.
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10
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Romanova N, Niemann T, Greiner JFW, Kaltschmidt B, Kaltschmidt C, Noll T. Hyperosmolality in CHO culture: Effects on cellular behavior and morphology. Biotechnol Bioeng 2021; 118:2348-2359. [PMID: 33751545 DOI: 10.1002/bit.27747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/23/2021] [Accepted: 03/08/2021] [Indexed: 01/02/2023]
Abstract
Exposure of Chinese hamster ovary cells (CHO) to highly concentrated feed solution during fed-batch cultivation is known to result in an unphysiological osmolality increase (>300 mOsm/kg), affecting cell physiology and morphology. Extending previous observation on osmotic adaptation, the present study investigates for the first time potential effects of hyperosmolality on CHO cells on both population and single-cell level. We intentionally exposed CHO cells to hyperosmolality of up to 545 mOsm/kg during fed-batch cultivation. In concordance with existing research data, hyperosmolality-exposed CHO cells showed a nearly triplicated volume accompanied by ablation of proliferation. On the molecular level, we observed a strong hyperosmolality-dependent increase in mitochondrial activity in CHO cells compared to control. In contrast to mitochondrial activity, hyperosmolality-dependent proliferation arrest of CHO cells was not accompanied by DNA accumulation or caspase-3/7-mediated apoptosis. Notably, we demonstrate for the first time a formation of up to eight multiple, small nuclei in single hyperosmolality-stressed CHO cells. The here presented observations reveal previously unknown hyperosmolality-dependent morphological changes in CHO cells and support existing data on the osmotic response in mammalian cells.
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Affiliation(s)
- Nadiya Romanova
- Cell Culture Technology, Faculty of Technology, Bielefeld University, Bielefeld, Germany
| | - Tarek Niemann
- AG Molecular Neurobiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
- Department of Cell Biology, Faculty of Biology, University of Bielefeld, Universitaetsstrasse 25, Bielefeld, 33615, Germany
| | - Johannes F W Greiner
- Department of Cell Biology, Faculty of Biology, University of Bielefeld, Universitaetsstrasse 25, Bielefeld, 33615, Germany
| | - Barbara Kaltschmidt
- AG Molecular Neurobiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
- Department of Cell Biology, Faculty of Biology, University of Bielefeld, Universitaetsstrasse 25, Bielefeld, 33615, Germany
| | - Christian Kaltschmidt
- Department of Cell Biology, Faculty of Biology, University of Bielefeld, Universitaetsstrasse 25, Bielefeld, 33615, Germany
| | - Thomas Noll
- Cell Culture Technology, Faculty of Technology, Bielefeld University, Bielefeld, Germany
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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: 20] [Impact Index Per Article: 6.7] [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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12
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Li W, Fan Z, Lin Y, Wang TY. Serum-Free Medium for Recombinant Protein Expression in Chinese Hamster Ovary Cells. Front Bioeng Biotechnol 2021; 9:646363. [PMID: 33791287 PMCID: PMC8006267 DOI: 10.3389/fbioe.2021.646363] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 02/17/2021] [Indexed: 01/08/2023] Open
Abstract
At present, nearly 70% of recombinant therapeutic proteins (RTPs) are produced by Chinese hamster ovary (CHO) cells, and serum-free medium (SFM) is necessary for their culture to produce RTPs. In this review, the history and key components of SFM are first summarized, and its preparation and experimental design are described. Some small molecule compound additives can improve the yield and quality of RTP. The function and possible mechanisms of these additives are also reviewed here. Finally, the future perspectives of SFM use with CHO cells for RTP production are discussed.
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Affiliation(s)
- Weifeng Li
- Department of Biochemistry and Molecular Biology, Xinxiang Medical University, Xinxiang, China
| | - Zhenlin Fan
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, China
| | - Yan Lin
- International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, China
| | - Tian-Yun Wang
- Department of Biochemistry and Molecular Biology, Xinxiang Medical University, Xinxiang, China.,International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, China
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13
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Mayrhofer P, Reinhart D, Castan A, Kunert R. Rapid development of clone-specific, high-performing perfusion media from established feed supplements. Biotechnol Prog 2020; 36:e2933. [PMID: 31680446 PMCID: PMC7187557 DOI: 10.1002/btpr.2933] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 10/04/2019] [Accepted: 10/09/2019] [Indexed: 02/06/2023]
Abstract
Perfusion cultivation of recombinant CHO cells is of substantial interest to the biopharmaceutical industry. This is due to increased space-time-yields (STYs) and a short residence time of the recombinant protein in the bioreactor. Economic processes rely on cultivation media supporting rapid growth in the exponential phase and high protein production in the stationary phase at minimal media consumption rates. To develop clone-specific, high-performing perfusion media we present a straightforward and rapid two-step approach combining commercially available basal media and feed supplements using design-of-experiment. First, the best performing feed supplements are selected in batch cultures. Then, the mixing ratio of selected feed supplements is optimized in small-scale semicontinuous perfusion cultures. The final media formulation is supported by statistical response surface modeling of a set of cultivation experiments with blended media formulations. Two best performing novel media blends were finally applied to perfusion bioreactor verification runs to reach 200 × 106 c/ml within 2 weeks at minimum cell-specific perfusion rates as low as 10-30 pL/c/d. Obtained STYs of 0.4-1.2 g/L/d represent a 10-fold increase compared to batch cultures. This general workflow is universally applicable to any perfusion platform combining a specific cell line, basal medium, and established feed solutions.
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Affiliation(s)
- Patrick Mayrhofer
- Department of BiotechnologyUniversity of Natural Resources and Life Sciences (BOKU)ViennaAustria
| | - David Reinhart
- Department of BiotechnologyUniversity of Natural Resources and Life Sciences (BOKU)ViennaAustria
| | | | - Renate Kunert
- Department of BiotechnologyUniversity of Natural Resources and Life Sciences (BOKU)ViennaAustria
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