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Couvillion SP, Danczak RE, Cao X, Yang Q, Keerthisinghe TP, McClure RS, Bitounis D, Burnet MC, Fansler SJ, Richardson RE, Fang M, Qian WJ, Demokritou P, Thrall BD. Graphene oxide exposure alters gut microbial community composition and metabolism in an in vitro human model. NANOIMPACT 2023; 30:100463. [PMID: 37060994 DOI: 10.1016/j.impact.2023.100463] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 03/31/2023] [Accepted: 04/11/2023] [Indexed: 05/12/2023]
Abstract
Graphene oxide (GO) nanomaterials have unique physicochemical properties that make them highly promising for biomedical, environmental, and agricultural applications. There is growing interest in the use of GO and extensive in vitro and in vivo studies have been conducted to assess its nanotoxicity. Although it is known that GO can alter the composition of the gut microbiota in mice and zebrafish, studies on the potential impacts of GO on the human gut microbiome are largely lacking. This study addresses an important knowledge gap by investigating the impact of GO exposure- at low (25 mg/L) and high (250 mg/L) doses under both fed (nutrient rich) and fasted (nutrient deplete) conditions- on the gut microbial communitys' structure and function, using an in vitro model. This model includes simulated oral, gastric, small intestinal phase digestion of GO followed by incubation in a colon bioreactor. 16S rRNA amplicon sequencing revealed that GO exposure resulted in a restructuring of community composition. 25 mg/L GO induced a marked decrease in the Bacteroidota phylum and increased the ratio of Firmicutes to Bacteroidota (F/B). Untargeted metabolomics on the supernatants indicated that 25 mg/L GO impaired microbial utilization and metabolism of substrates (amino acids, carbohydrate metabolites) and reduced production of beneficial microbial metabolites such as 5-hydroxyindole-3-acetic acid and GABA. Exposure to 250 mg/L GO resulted in community composition and metabolome profiles that were very similar to the controls that lacked both GO and digestive enzymes. Differential abundance analyses revealed that 3 genera from the phylum Bacteroidota (Bacteroides, Dysgonomonas, and Parabacteroides) were more abundant after 250 mg/L GO exposure, irrespective of feed state. Integrative correlation network analysis indicated that the phylum Bacteroidota showed strong positive correlations to multiple microbial metabolites including GABA and 3-indoleacetic acid, are much larger number of correlations compared to other phyla. These results show that GO exposure has a significant impact on gut microbial community composition and metabolism at both low and high GO concentrations.
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Affiliation(s)
- Sneha P Couvillion
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA.
| | - Robert E Danczak
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Xiaoqiong Cao
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard School of Public Health, 655 Huntington Ave, Boston, MA 02115, USA
| | - Qin Yang
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Tharushi P Keerthisinghe
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Ryan S McClure
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Dimitrios Bitounis
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard School of Public Health, 655 Huntington Ave, Boston, MA 02115, USA
| | - Meagan C Burnet
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Sarah J Fansler
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Rachel E Richardson
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Mingliang Fang
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Wei-Jun Qian
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard School of Public Health, 655 Huntington Ave, Boston, MA 02115, USA.
| | - Brian D Thrall
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
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ClearColi as a platform for untagged pneumococcal surface protein A production: cultivation strategy, bioreactor culture, and purification. Appl Microbiol Biotechnol 2022; 106:1011-1029. [PMID: 35024919 PMCID: PMC8755982 DOI: 10.1007/s00253-022-11758-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 11/27/2022]
Abstract
Abstract
Several studies have searched for new antigens to produce pneumococcal vaccines that are more effective and could provide broader coverage, given the great number of serotypes causing pneumococcal diseases. One of the promising subunit vaccine candidates is untagged recombinant pneumococcal surface protein A (PspA4Pro), obtainable in high quantities using recombinant Escherichia coli as a microbial factory. However, lipopolysaccharides (LPS) present in E. coli cell extracts must be removed, in order to obtain the target protein at the required purity, which makes the downstream process more complex and expensive. Endotoxin-free E. coli strains, which synthesize a nontoxic mutant LPS, may offer a cost-effective alternative way to produce recombinant proteins for application as therapeutics. This paper presents an investigation of PspA4Pro production employing the endotoxin-free recombinant strain ClearColi® BL21(DE3) with different media (defined, auto-induction, and other complex media), temperatures (27, 32, and 37 °C), and inducers. In comparison to conventional E. coli cells in a defined medium, ClearColi presented similar PspA4Pro yields, with lower productivities. Complex medium formulations supplemented with salts favored PspA4Pro yields, titers, and ClearColi growth rates. Induction with isopropyl-β-d-thiogalactopyranoside (0.5 mM) and lactose (2.5 g/L) together in a defined medium at 32 °C, which appeared to be a promising cultivation strategy, was reproduced in 5 L bioreactor culture, leading to a yield of 146.0 mg PspA4Pro/g dry cell weight. After purification, the cell extract generated from ClearColi led to 98% purity PspA4Pro, which maintained secondary structure and biological function. ClearColi is a potential host for industrial recombinant protein production. Key points • ClearColi can produce as much PspA4Pro as conventional E. coli BL21(DE3) cells. • 10.5 g PspA4Pro produced in ClearColi bioreactor culture using a defined medium. • Functional PspA4Pro (98% of purity) was obtained in ClearColi bioreactor culture.Graphical abstract ![]() Supplementary Information The online version contains supplementary material available at 10.1007/s00253-022-11758-9.
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Bukhari NA, Loh SK, Luthfi AAI, Abdul PM, Jahim JM. Low cost nutrient-rich oil palm trunk bagasse hydrolysate for bio-succinic acid production by Actinobacillus succinogenes. Prep Biochem Biotechnol 2021; 52:950-960. [PMID: 34935581 DOI: 10.1080/10826068.2021.2015692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Economical source of succinic acid (SA) is most sought-after as a key platform chemical for a wide range of applications. Low-cost production of bio-succinic acid (bio-SA) from a renewable biomass resource i.e., oil palm trunk (OPT) is reported in this paper. Apart from carbon source, nitrogen source and mineral salts are other important nutrients affecting microbial cell growth and bio-SA biosynthesis by Actinobacillus succinogenes 130Z. In order to access and optimize nutrient requirement of the latter two sources, their effects in terms of types and concentrations were investigated. The findings highlighted the importance of selecting proper nitrogen source in A. succinogenes fermentation. The possibility of producing bio-SA from OPT economically can be achieved through minimal supply of 5 g/L yeast extract compared to that generally supplemented 15 g/L with a similar yield (0.47 g/g). In addition, a higher bio-SA yield (0.49 g/g) was achieved without adding mineral salts, which could further reduce fermentation cost. The use of minimally supplemented hydrolysate resulted in 21.1 g/L of bio-SA with a satisfactory yield (0.58 g/g) in a batch bioreactor system with an estimated 56.4% in cost savings. Conclusively, OPT bagasse hydrolysate is a nutrient-rich feedstock that can be practically utilized for bio-SA production.
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Affiliation(s)
- Nurul Adela Bukhari
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia.,Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia.,Energy and Environment Unit, Engineering and Processing Research Division, Malaysian Palm Oil Board (MPOB), Selangor, Kajang, Malaysia
| | - Soh Kheang Loh
- Energy and Environment Unit, Engineering and Processing Research Division, Malaysian Palm Oil Board (MPOB), Selangor, Kajang, Malaysia
| | - Abdullah Amru Indera Luthfi
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia.,Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Peer Mohamed Abdul
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia.,Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Jamaliah Md Jahim
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia.,Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia
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Posung M, Promkhatkaew D, Borg J, Tongta A. Development of a modified serum-free medium for Vero cell cultures: effects of protein hydrolysates, l-glutamine and SITE liquid media supplement on cell growth. Cytotechnology 2021; 73:683-695. [PMID: 34629745 DOI: 10.1007/s10616-020-00450-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 11/02/2016] [Indexed: 11/26/2022] Open
Abstract
Vero cells have been widely used in the viral vaccine production due to the recommendation of the World Health Organization regarding its safety and non-tumorigenicity. The aim of this study was to describe the development a modified serum-free medium for Vero cell cultures. Two protein hydrolysates (Bacto™ soytone and Bacto™ yeast extract), vitamin C, vitamin B12, SITE liquid media supplement, and recombinant human epidermal growth factor (rEGF) were investigated as serum substitutes. A sequential experiment of fractional factorial and central composite design was applied. A modified serum-free medium obtained (named as SFM01-M) was verified. Contrary to P0, the cell yields obtained at P1, P2, and P3 decreased continuously during the verification experiments indicating that Vero cells could not adapt to SFM01-M as expected according to the empirical mathematical model. To improve cell growth after P0, protein hydrolysates, l-glutamine, and SITE liquid media supplement were further investigated. The results showed that cell yields gradually decreased from P1 to P3 when a fixed concentration of Bacto™ yeast extract (7.0 g/L) combined with various concentrations of Bacto™ soytone (0.1-7.0 g/L) in SFM01-M were used. Similarly, cell yields also gradually decreased from P1 to P3 when a fixed concentration of Bacto™ soytone (7.0 g/L) combined with various concentrations of Bacto™ yeast extract (0.1-7.0 g/L) in SFM01-M were used. However, the combination of Bacto™ soytone at 0.1 g/L and Bacto™ yeast extract at 7.0 g/L or Bacto™ soytone at 7.0 g/L and Bacto™ yeast extract at 0.1 g/L in SFM01-M could give the maximum cell yield at P3 when compared with other combinations. In addition, the addition of SITE liquid media supplement (0.1-2.0% v/v) in SFM01-M in which the concentrations of Bacto™ soytone, Bacto™ yeast extract, and l-glutamine were fixed at 0.1 g/L, 0.1 g/L, and 4.0 mM, respectively, the results showed that the cell yields obtained at P3 were not significantly different. From this study, the optimum concentrations of SFM01-M components were as follows: Bacto™ soytone (0.1 g/L), Bacto™ yeast extract (0.1 g/L), vitamin C (9.719 mg/L), vitamin B12 (0.1725 mg/L), SITE liquid media supplement (0.1-2.0% v/v), rEGF (0.05756 mg/L), l-glutamine (4.0 mM), MEM non-essential amino acids (1.0% v/v), sodium pyruvate (1.0 mM), MEM (9.4 g/L), and sodium hydrogen carbonate (2.2 g/L). However, to evaluate SFM01-M in the long-term subculture of Vero cells, the efficiency of SFM01-M will be further investigated.
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Affiliation(s)
- Manoch Posung
- Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150 Thailand
- Medical Biotechnology Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000 Thailand
| | - Duanthanorm Promkhatkaew
- Office of Knowledge and Medical Science Technology Management, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000 Thailand
| | - Jörgen Borg
- Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150 Thailand
| | - Anan Tongta
- Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150 Thailand
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5
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Combe M, Sokolenko S. Quantifying the impact of cell culture media on CHO cell growth and protein production. Biotechnol Adv 2021; 50:107761. [PMID: 33945850 DOI: 10.1016/j.biotechadv.2021.107761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 04/22/2021] [Accepted: 04/24/2021] [Indexed: 10/21/2022]
Abstract
In recombinant protein production, cell culture media development and optimization is typically seen as a useful strategy to increase titer and cell density, reduce by-products, as well as improve product quality (with cell density and titer often serving as the primary reported outcome of media studies). However, despite the large number of media optimization studies, there have been few attempts to comprehensively assess the overall effectiveness of media additives. The aim of this review is therefore both to document published media optimization studies over the last twenty years (in the context of Chinese hamster ovary cell recombinant production) and quantitatively estimate the impact of this media optimization on cell culture performance. In considering 78 studies, we have identified 238 unique media components that have been supplemented over the last 20 years. Among these additives, trace elements stood out as having a positive impact on cell density while nucleotides show potential for increasing titer, with commercial supplements benefiting both. However, we also identified that the impact of specific additives is far more variable than often perceived. With relatively few media studies considering multiple cell lines or multiple basal media, teasing out consistent and general trends becomes a considerable challenge. By extracting cell density and titer values from all of the reviewed studies, we were able to build a mixed-effect model capable of estimating the relative impact of additives, cell line, product type, basal medium, cultivation method (flask or reactor), and feeding strategy (batch or fed-batch). Overall, additives only accounted for 3% of the variation in cell density and 1% of the variation in titer. Similarly, the impact of basal media was also relatively modest, at 10% for cell density and 0% for titer. Cell line, product type, and feeding strategy were all found to have more impact. These results emphasize the need for media studies to consider more factors to ensure that reported observations can be generalized and further developed.
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Affiliation(s)
- Michelle Combe
- Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington St., PO Box 15000, Halifax, NS B3H 4R2, Canada
| | - Stanislav Sokolenko
- Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington St., PO Box 15000, Halifax, NS B3H 4R2, Canada.
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6
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Djemal L, von Hagen J, Kolmar H, Deparis V. Characterization of soy protein hydrolysates and influence of its iron content on monoclonal antibody production by a murine hybridoma cell line. Biotechnol Prog 2021; 37:e3147. [PMID: 33742790 DOI: 10.1002/btpr.3147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/23/2021] [Accepted: 03/16/2021] [Indexed: 11/12/2022]
Abstract
A challenging aspect with the use of protein hydrolysates in commercial manufacturing processes of recombinant therapeutic proteins is their impacts on the protein production due to a lack of understanding of batch-to-batch variability. Soy hydrolysates variability and its impact on fed-batch production of a recombinant monoclonal antibody (mAb) expressed in Sp2/0 cells were studied using 37 batches from the same vendor. The batch-to-batch variability of soy hydrolysates impacted cell growth, titer and product quality. Physicochemical characterization of batches confirmed that soy hydrolysates are mainly a source of amino acids and peptides containing lower amounts of other components such as carbohydrates and chemical elements in cell culture media. Soy hydrolysates composition of different batches was consistent except for trace elements. Statistical analyses identified iron as a potential marker of a poor process performance. To verify this correlation, two forms of iron, ferric ammonium citrate and ferrous sulfate, were added to a batch of soy hydrolysates associated to a low level of iron during cell culture. Both forms of iron reduced significantly cell growth, mAb titer and increased level of the acidic charge variants of the mAb. Consequently, trace element composition of soy hydrolysates or of all incoming raw materials might lead to significant impacts on process performance and product quality and therefore need to be tightly controlled.
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Affiliation(s)
- Leïla Djemal
- Manufacturing Science and Technology, Heathcare, Merck KGaA, Corsier-sur-Vevey, Switzerland.,Department of Applied Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
| | | | - Harald Kolmar
- Department of Applied Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
| | - Véronique Deparis
- Manufacturing Science and Technology, Heathcare, Merck KGaA, Corsier-sur-Vevey, Switzerland
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7
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Möller J, Korte K, Pörtner R, Zeng AP, Jandt U. Model-based identification of cell-cycle-dependent metabolism and putative autocrine effects in antibody producing CHO cell culture. Biotechnol Bioeng 2018; 115:2996-3008. [DOI: 10.1002/bit.26828] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 08/20/2018] [Accepted: 08/30/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Johannes Möller
- Hamburg University of Technology, Institute of Bioprocess and Biosystems Engineering; Hamburg Germany
| | - Katrin Korte
- Hamburg University of Technology, Institute of Bioprocess and Biosystems Engineering; Hamburg Germany
| | - Ralf Pörtner
- Hamburg University of Technology, Institute of Bioprocess and Biosystems Engineering; Hamburg Germany
| | - An-Ping Zeng
- Hamburg University of Technology, Institute of Bioprocess and Biosystems Engineering; Hamburg Germany
| | - Uwe Jandt
- Hamburg University of Technology, Institute of Bioprocess and Biosystems Engineering; Hamburg Germany
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Vijayasankaran N, Varma S, Yang Y, Meier S, Kiss R. Effect of cell culture medium additives on color and acidic charge variants of a monoclonal antibody. Biotechnol Prog 2018; 34:1298-1307. [DOI: 10.1002/btpr.2668] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 05/15/2018] [Indexed: 01/19/2023]
Affiliation(s)
| | - Sharat Varma
- Late Stage Cell Culture, South San Francisco, CA 94080
| | - Yi Yang
- Protein Analytical ChemistryGenentech, Inc.South San Francisco CA 94080
| | - Steven Meier
- Late Stage Cell Culture, South San Francisco, CA 94080
| | - Robert Kiss
- Late Stage Cell Culture, South San Francisco, CA 94080
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Ho SCL, Nian R, Woen S, Chng J, Zhang P, Yang Y. Impact of hydrolysates on monoclonal antibody productivity, purification and quality in Chinese hamster ovary cells. J Biosci Bioeng 2016; 122:499-506. [PMID: 27067279 DOI: 10.1016/j.jbiosc.2016.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/07/2016] [Accepted: 03/08/2016] [Indexed: 12/11/2022]
Abstract
Plant and yeast derived hydrolysates are economical and efficient alternative medium supplements to improve mammalian cell culture performance. We supplemented two commercial Chinese hamster ovary (CHO) culture media with hydrolysates from four different sources, yeast, soybean, Ex-Cell CD (a chemically defined hydrolysate replacement) and wheat to improve the productivity of two cell lines expressing different monoclonal antibodies (mAbs). Yeast, soybean and Ex-Cell CD improved the final mAb titer by increasing the specific productivity (qP) and/or extension of the culture period. Wheat hydrolysates increased peak viable cell density but did not improve productivity. IgG recovery from protein A purification was not compromised for all cultures by adding yeast, soybean and Ex-Cell CD hydrolysates except for one sample from soybean supplemented culture. Adding these three hydrolysates neither increased the amount of host cell protein, DNA or aggregate impurity amounts nor affect their clearance after purification. Profiling of the glycan types revealed that yeast and soybean hydrolysates could affect the distribution of galactosylated glycans. Ex-Cell CD performed the best at maintaining glycan profile compared to the non-supplemented cultures. Overall, yeast performed the best at improving CHO culture growth and productivity without being detrimental to downstream protein A processes but could affect mAb product glycan distribution while Ex-Cell CD yielded lower titers but has less effect on glycosylation. The hydrolysate to use would thus depend on the requirements of each process and our results would provide a good reference for improving culture performance with hydrolysates or related studies.
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Affiliation(s)
- Steven C L Ho
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01 Centros, 138668, Singapore
| | - Rui Nian
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01 Centros, 138668, Singapore
| | - Susanto Woen
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01 Centros, 138668, Singapore
| | - Jake Chng
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01 Centros, 138668, Singapore
| | - Peiqing Zhang
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01 Centros, 138668, Singapore
| | - Yuansheng Yang
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01 Centros, 138668, Singapore.
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Spearman M, Chan S, Jung V, Kowbel V, Mendoza M, Miranda V, Butler M. Components of yeast (Sacchromyces cervisiae) extract as defined media additives that support the growth and productivity of CHO cells. J Biotechnol 2016; 233:129-42. [DOI: 10.1016/j.jbiotec.2016.04.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 03/18/2016] [Accepted: 04/19/2016] [Indexed: 12/19/2022]
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Understanding the intracellular effects of yeast extract on the enhancement of Fc-fusion protein production in Chinese hamster ovary cell culture. Appl Microbiol Biotechnol 2015; 99:8429-40. [DOI: 10.1007/s00253-015-6789-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/17/2015] [Accepted: 06/19/2015] [Indexed: 10/23/2022]
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12
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13
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Spearman M, Lodewyks C, Richmond M, Butler M. The bioactivity and fractionation of peptide hydrolysates in cultures of CHO cells. Biotechnol Prog 2014; 30:584-93. [DOI: 10.1002/btpr.1930] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 05/13/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Maureen Spearman
- Dept. of Microbiology; University of Manitoba; Winnipeg MB R3T 2N2 Canada
| | - Carly Lodewyks
- Dept. of Microbiology; University of Manitoba; Winnipeg MB R3T 2N2 Canada
| | - Meika Richmond
- Dept. of Microbiology; University of Manitoba; Winnipeg MB R3T 2N2 Canada
| | - Michael Butler
- Dept. of Microbiology; University of Manitoba; Winnipeg MB R3T 2N2 Canada
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Gupta AJ, Hageman JA, Wierenga PA, Boots JW, Gruppen H. Chemometric analysis of soy protein hydrolysates used in animal cell culture for IgG production – An untargeted metabolomics approach. Process Biochem 2014. [DOI: 10.1016/j.procbio.2013.10.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Gupta AJ, Gruppen H, Maes D, Boots JW, Wierenga PA. Factors causing compositional changes in soy protein hydrolysates and effects on cell culture functionality. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:10613-10625. [PMID: 24117369 DOI: 10.1021/jf403051z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Soy protein hydrolysates significantly enhance cell growth and recombinant protein production in cell cultures. The extent of this enhancement in cell growth and IgG production is known to vary from batch to batch. This can be due to differences in the abundance of different classes of compounds (e.g., peptide content), the quality of these compounds (e.g., glycated peptides), or the presence of specific compounds (e.g., furosine). These quantitative and qualitative differences between batches of hydrolysates result from variation in the seed composition and seed/meal processing. Although a considerable amount of literature is available that describes these factors, this knowledge has not been combined in an overview yet. The aim of this review is to identify the most dominant factors that affect hydrolysate composition and functionality. Although there is a limited influence of variation in the seed composition, the overview shows that the qualitative changes in hydrolysate composition result in the formation of minor compounds (e.g., Maillard reaction products). In pure systems, these compounds have a profound effect on the cell culture functionality. This suggests that the presence of these compounds in soy protein hydrolysates may affect hydrolysate functionality as well. This influence on the functionality can be of direct or indirect nature. For instance, some minor compounds (e.g., Maillard reaction products) are cytotoxic, whereas other compounds (e.g., phytates) suppress protein hydrolysis during hydrolysate production, resulting in altered peptide composition, and, thus, affect the functionality.
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Affiliation(s)
- Abhishek J Gupta
- Laboratory of Food Chemistry, Wageningen University , P.O. Box 17, 6700 AA Wageningen, The Netherlands
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Mosser M, Kapel R, Aymes A, Bonanno LM, Olmos E, Chevalot I, Marc I, Marc A. Chromatographic fractionation of yeast extract: A strategy to identify physicochemical properties of compounds promoting CHO cell culture. Process Biochem 2012. [DOI: 10.1016/j.procbio.2012.04.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Luo Y, Pierce KM. Development toward rapid and efficient screening for high performance hydrolysate lots in a recombinant monoclonal antibody manufacturing process. Biotechnol Prog 2012; 28:1061-8. [PMID: 22641483 DOI: 10.1002/btpr.1568] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 05/08/2012] [Indexed: 12/11/2022]
Abstract
Plant-derived hydrolysates are widely used in mammalian cell culture media to increase yields of recombinant proteins and monoclonal antibodies (mAbs). However, these chemically varied and undefined raw materials can have negative impact on yield and/or product quality in large-scale cell culture processes. Traditional methods that rely on fractionation of hydrolysates yielded little success in improving hydrolysate quality. We took a holistic approach to develop an efficient and reliable method to screen intact soy hydrolysate lots for commercial recombinant mAb manufacturing. Combined high-resolution (1) H nuclear magnetic resonance (NMR) spectroscopy and partial least squares (PLS) analysis led to a prediction model between product titer and NMR fingerprinting of soy hydrolysate with cross-validated correlation coefficient R(2) of 0.87 and root-mean-squared-error of cross-validation RMSECV% of 11.2%. This approach screens for high performance hydrolysate lots, therefore ensuring process consistency and product quality in the mAb manufacturing process. Furthermore, PLS analysis was successful in discerning multiple markers (DL-lactate, soy saccharides, citrate and succinate) among hydrolysate components that positively and negatively correlate with titer. Interestingly, these markers correlate to the metabolic characteristics of some strains of taxonomically diverse lactic acid bacteria (LAB). Thus our findings indicate that LAB strains may exist during hydrolysate manufacturing steps and their biochemical activities may attribute to the titer enhancement effect of soy hydrolysates.
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Affiliation(s)
- Ying Luo
- Product and Process Development, Amgen Inc, One Amgen Center Drive, Thousand Oaks, CA 91320, USA.
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Michiels JF, Sart S, Schneider YJ, Agathos S. Effects of a soy peptone on γ-IFN production steps in CHO-320 cells. Process Biochem 2011. [DOI: 10.1016/j.procbio.2011.05.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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