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Lee JY, Huh HD, Lee DK, Park SY, Shin JE, Gee HY, Park HW. Reprogramming anchorage dependency to develop cell lines for recombinant protein expression. Biotechnol J 2024; 19:e2400104. [PMID: 38700448 DOI: 10.1002/biot.202400104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/25/2024] [Accepted: 04/01/2024] [Indexed: 05/05/2024]
Abstract
As the biopharmaceutical industry continues to mature in its cost-effectiveness and productivity, many companies have begun employing larger-scale biomanufacturing and bioprocessing protocols. While many of these protocols require cells with anchorage-independent growth, it remains challenging to induce the necessary suspension adaptations in many different cell types. In addition, although transfection efficiency is an important consideration for all cells, especially for therapeutic protein production, cells in suspension are generally more difficult to transfect than adherent cells. Thus, much of the biomanufacturing industry is focused on the development of new human cell lines with properties that can support more efficient biopharmaceutical production. With this in mind, we identified a set of "Adherent-to-Suspension Transition" (AST) factors, IKZF1, BTG2 and KLF1, the expression of which induces adherent cells to acquire anchorage-independent growth. Working from the HEK293A cell line, we established 293-AST cells and 293-AST-TetR cells for inducible and reversible reprogramming of anchorage dependency. Surprisingly, we found that the AST-TetR system induces the necessary suspension adaptations with an accompanying increase in transfection efficiency and protein expression rate. Our AST-TetR system therefore represents a novel technological platform for the development of cell lines used for generating therapeutic proteins.
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Affiliation(s)
- Ju Young Lee
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
| | - Hyunbin D Huh
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
| | - Dong Ki Lee
- Department of Pharmacology, Graduate School of Medical Science, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - So Yeon Park
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
| | - Ji Eun Shin
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
| | - Heon Yung Gee
- Department of Pharmacology, Graduate School of Medical Science, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyun Woo Park
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
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2
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Pandey SP, Singh PK, Jha P, Jobby R. A turn-on fluorescence sensor for detection of heparinase with heparin templated aggregation of tetracationic porphyrin derivative. Int J Biol Macromol 2023; 249:125934. [PMID: 37482160 DOI: 10.1016/j.ijbiomac.2023.125934] [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: 03/01/2023] [Revised: 07/03/2023] [Accepted: 07/20/2023] [Indexed: 07/25/2023]
Abstract
Heparinase is the only mammalian endoglycosidase that breaks down the commonly used blood-anticoagulant heparin into therapeutically relevant low-molecular-weight-heparin. Importantly, heparinase has been considered a malignant disease diagnostic marker. Thus, it is essential to develop detection scheme for heparinase. However, optical methods for heparinase determination are limited. In the present work, we report a turn-on fluorescence sensor for detection of heparinase that utilizes heparin-templated aggregation of a tetra-cationic porphyrin derivative, TMPyP4+, as a sensing framework. Heparinase cleaves the glycosidic linkage between hexosamine and uronic acid in the structure of heparin to destroy its polyelectrolytic nature that originally causes the aggregation of TMPyP4+. Thus, heparinase leads to dissociation of TMPyP4+ aggregates and generates an optical signal. This system leads to a sensitive and selective response towards heparinase with a Limit of Detection (LOD) of 0.3 pmol/L. Further, the same system is demonstrated to sense a trace amount of Oversulfated Chondrootin Sulphate (OSCS) in heparin, which is a heparin adulterant, by utilizing the fact that OSCS serves as an inhibitor for heparinase activity, which leads to reverse modulation in the photo-physical features of the monomer/aggregate equilibrium of the TMPyP4+-heparin-heparinase system. The sensing mechanism has been thoroughly demonstrated by ground-state absorption, steady-state emission, and time-resolved emission measurements. The selectivity of the sensor was tested using lysozyme, α-amylase, pepsin, trypsin, lipase, and glucose oxidase in the heparinase selectivity study and the method is also validated using another method reported in the literature. The study provides a new approach for the development of optical methods for the detection of heparinase and oversulfated chondroitin sulfate, which is currently limited.
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Affiliation(s)
- Shrishti P Pandey
- Amity Institute of Biotechnology, Amity University Maharashtra - Mumbai - Pune Expressway, Bhatan, Panvel, Maharashtra 410206, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400085, India.
| | - Pamela Jha
- Department of Biological Sciences, Sunandan Divatia School of Science, NMIMS Deemed to be University, Vile Parle (West), Mumbai 400056, India
| | - Renitta Jobby
- Amity Institute of Biotechnology, Amity University Maharashtra - Mumbai - Pune Expressway, Bhatan, Panvel, Maharashtra 410206, India; Amity Centre of Excellence in Astrobiology, Amity University Maharashtra - Pune Expressway, Bhatan, Panvel, Mumbai, Maharashtra 410206, India.
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3
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Louie S, Heidersbach A, Blanco N, Haley B, Rose CM, Liu PS, Yim M, Tang D, Lam C, Sandoval WN, Shaw D, Snedecor B, Misaghi S. Endothelial intercellular cell adhesion molecule 1 contributes to cell aggregate formation in CHO cells cultured in serum‐free media. Biotechnol Prog 2020; 36:e2951. [DOI: 10.1002/btpr.2951] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 11/14/2019] [Accepted: 12/11/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Salina Louie
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Amy Heidersbach
- Molecular Biology DepartmentGenentech, Inc. South San Francisco California
| | - Noelia Blanco
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Benjamin Haley
- Molecular Biology DepartmentGenentech, Inc. South San Francisco California
| | - Christopher M. Rose
- Microchemistry Proteomic and Lipidomic (MPL) DepartmentGenentech, Inc. South San Francisco California
| | - Peter S. Liu
- Microchemistry Proteomic and Lipidomic (MPL) DepartmentGenentech, Inc. South San Francisco California
| | - Mandy Yim
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Danming Tang
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Cynthia Lam
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Wendy N. Sandoval
- Microchemistry Proteomic and Lipidomic (MPL) DepartmentGenentech, Inc. South San Francisco California
| | - David Shaw
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Brad Snedecor
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
| | - Shahram Misaghi
- Cell Culture DepartmentGenentech, Inc. South San Francisco California
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Shurer CR, Head SE, Goudge MC, Paszek MJ. Mucin-coating technologies for protection and reduced aggregation of cellular production systems. Biotechnol Bioeng 2019; 116:994-1005. [PMID: 30636317 PMCID: PMC6763341 DOI: 10.1002/bit.26916] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 12/10/2018] [Accepted: 01/09/2019] [Indexed: 01/23/2023]
Abstract
Optimization of host-cell production systems with improved yield and production reliability is desired to meet the increasing demand for biologics with complex posttranslational modifications. Aggregation of suspension-adapted mammalian cells remains a significant problem that can limit the cellular density and per volume yield of bioreactors. Here, we propose a genetically encoded technology that directs the synthesis of antiadhesive and protective coatings on the cellular surface. Inspired by the natural ability of mucin glycoproteins to resist cellular adhesion and hydrate and protect cell and tissue surfaces, we genetically encode new cell-surface coatings through the fusion of engineered mucin domains to synthetic transmembrane anchors. Combined with appropriate expression systems, the mucin-coating technology directs the assembly of thick, highly hydrated barriers to strongly mitigate cell aggregation and protect cells in suspension against fluid shear stresses. The coating technology is demonstrated on suspension-adapted human 293-F cells, which resist clumping even in media formulations that otherwise would induce extreme cell aggregation and show improved performance over a commercially available anticlumping agent. The stable biopolymer coatings do not show deleterious effects on cell proliferation rate, efficiency of transient transfection with complementary DNAs, or recombinant protein expression. Overall, our mucin-coating technology and engineered cell lines have the potential to improve the single-cell growth and viability of suspended cells in bioreactors.
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Affiliation(s)
- Carolyn R. Shurer
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853
| | - Shelby E. Head
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853
| | - Marc C. Goudge
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853
| | - Matthew J. Paszek
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853
- Field of Biophysics, Cornell University, Ithaca, NY 14853
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5
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Lipsitz YY, Tonge PD, Zandstra PW. Chemically controlled aggregation of pluripotent stem cells. Biotechnol Bioeng 2018; 115:2061-2066. [PMID: 29679475 PMCID: PMC6055717 DOI: 10.1002/bit.26719] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 02/28/2018] [Accepted: 04/17/2018] [Indexed: 01/18/2023]
Abstract
Heterogeneity in pluripotent stem cell (PSC) aggregation leads to variability in mass transfer and signaling gradients between aggregates, which results in heterogeneous differentiation and therefore variability in product quality and yield. We have characterized a chemical‐based method to control aggregate size within a specific, tunable range with low heterogeneity, thereby reducing process variability in PSC expansion. This method enables controlled, scalable, stirred suspension‐based manufacturing of PSC cultures that are critical for the translation of regenerative medicine strategies to clinical products.
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Affiliation(s)
- Yonatan Y. Lipsitz
- Institute of Biomaterials and Biomedical EngineeringUniversity of TorontoTorontoOntarioCanada
| | - Peter D. Tonge
- Institute of Biomaterials and Biomedical EngineeringUniversity of TorontoTorontoOntarioCanada
- Centre for Commercialization of Regenerative MedicineTorontoOntarioCanada
| | - Peter W. Zandstra
- Institute of Biomaterials and Biomedical EngineeringUniversity of TorontoTorontoOntarioCanada
- Centre for Commercialization of Regenerative MedicineTorontoOntarioCanada
- The Donnelly Centre for Cellular and Biomolecular ResearchUniversity of TorontoTorontoOntarioCanada
- Medicine by Design: A Canada First Research Excellence Fund ProgramUniversity of TorontoTorontoOntarioCanada
- School of Biomedical EngineeringUniversity of British ColumbiaVancouverBritish ColumbiaCanada
- Michael Smith LaboratoriesUniversity of British ColumbiaVancouverBritish ColumbiaCanada
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6
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Qian Y, Rehmann MS, Qian N, He A, Borys MC, Kayne PS, Li ZJ. Hypoxia and transforming growth factor‐beta1 pathway activation promote Chinese Hamster Ovary cell aggregation. Biotechnol Bioeng 2018; 115:1051-1061. [DOI: 10.1002/bit.26520] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/28/2017] [Accepted: 12/15/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Yueming Qian
- Product DevelopmentGlobal Product Development and SupplyBristol‐Myers Squibb CompanyDevensMassachusetts
| | - Matthew S. Rehmann
- Product DevelopmentGlobal Product Development and SupplyBristol‐Myers Squibb CompanyDevensMassachusetts
| | - Nan‐Xin Qian
- Product DevelopmentGlobal Product Development and SupplyBristol‐Myers Squibb CompanyDevensMassachusetts
| | - Aiqing He
- Genomics DepartmentBristol‐Myers Squibb CompanyPenningtonNew Jersey
| | - Michael C. Borys
- Product DevelopmentGlobal Product Development and SupplyBristol‐Myers Squibb CompanyDevensMassachusetts
| | - Paul S. Kayne
- Genomics DepartmentBristol‐Myers Squibb CompanyPenningtonNew Jersey
| | - Zheng Jian Li
- Product DevelopmentGlobal Product Development and SupplyBristol‐Myers Squibb CompanyDevensMassachusetts
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7
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Klottrup KJ, Miro-Quesada G, Flack L, Pereda I, Hawley-Nelson P. Measuring the aggregation of CHO cells prior to single cell cloning allows a more accurate determination of the probability of clonality. Biotechnol Prog 2017; 34:593-601. [PMID: 28556621 DOI: 10.1002/btpr.2500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/14/2017] [Indexed: 11/11/2022]
Abstract
The manufacturing process for biotherapeutics is closely regulated by the Food and Drug Administration (FDA), European Medicines Agency (EMA) and other regulatory agencies worldwide. To ensure consistency of the product of a manufacturing cell line, International Committee on Harmonization guidelines (Q5D, 1997) state that the cell substrate should be derived from a single cell progenitor, i.e., clonal.Cell lines in suspension culture may naturally revert to cell adhesion in the form of doublets, triplets and higher order structures of clustered cells. We can show evidence of a single colony from limiting dilution cloning or in semi-solid media, but we cannot determine the number of cells from which the colony originated. To address this, we have used the ViCELL® XR (Beckman Coulter, High Wycombe, UK) cell viability analyzer to determine the proportion of clusters of two or more cells in a sample of the cell suspension immediately prior to cloning. Here, we show data to define the accuracy of the ViCELL for characterizing a cell suspension and summarize the statistical model combining two or more rounds of cloning to derive the probability of clonality. The resulting statistical model is applied to cloning in semi-solid medium, but could equally be applied to a limiting dilution cloning process. We also describe approaches to reduce cell clusters to generate a cell line with a high probability of clonality from a CHO host lineage. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 34:593-601, 2018.
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Affiliation(s)
- Kerensa J Klottrup
- Cell Culture and Fermentation Sciences, Biopharmaceutical Development, MedImmune, Cambridge, CB21 6GH, UK
| | - Guillermo Miro-Quesada
- Data Management and Quantitative Sciences, Biopharmaceutical Development, MedImmune, Gaithersburg, MD, 20878
| | | | - Ivan Pereda
- R&D Informatics, AstraZeneca, Cambridge, CB21 6GH, UK
| | - Pamela Hawley-Nelson
- Cell Culture and Fermentation Sciences, Biopharmaceutical Development, MedImmune, Gaithersburg, MD, 20878
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8
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Delafosse L, Xu P, Durocher Y. Comparative study of polyethylenimines for transient gene expression in mammalian HEK293 and CHO cells. J Biotechnol 2016; 227:103-111. [DOI: 10.1016/j.jbiotec.2016.04.028] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/30/2016] [Accepted: 04/12/2016] [Indexed: 01/28/2023]
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9
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Hyoung Park J, Sin Lim M, Rang Woo J, Won Kim J, Min Lee G. The molecular weight and concentration of dextran sulfate affect cell growth and antibody production in CHO cell cultures. Biotechnol Prog 2016; 32:1113-1122. [DOI: 10.1002/btpr.2287] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/15/2016] [Indexed: 01/07/2023]
Affiliation(s)
- Jin Hyoung Park
- Department of Biological Sciences; KAIST; 373-1 Kusong-Dong Yusong-Gu, Daejon 305-701 Republic of Korea
| | - Myung Sin Lim
- New Drug Development Center; Cheongju Republic of Korea
| | - Ju Rang Woo
- New Drug Development Center; Cheongju Republic of Korea
| | - Jong Won Kim
- New Drug Development Center; Cheongju Republic of Korea
| | - Gyun Min Lee
- Department of Biological Sciences; KAIST; 373-1 Kusong-Dong Yusong-Gu, Daejon 305-701 Republic of Korea
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Kim DK, Choi H, Nishida H, Oh JY, Gregory C, Lee RH, Yu JM, Watanabe J, An SY, Bartosh TJ, Prockop DJ. Scalable Production of a Multifunctional Protein (TSG-6) That Aggregates with Itself and the CHO Cells That Synthesize It. PLoS One 2016; 11:e0147553. [PMID: 26793973 PMCID: PMC4721919 DOI: 10.1371/journal.pone.0147553] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 01/05/2016] [Indexed: 01/11/2023] Open
Abstract
TNF-α stimulated gene/protein 6 (TNFAIP6/TSG-6) is a multifunctional protein that has a number of potential therapeutic applications. Experiments and clinical trials with TSG-6, however, have been limited by the technical difficulties of producing the recombinant protein. We prepared stable clones of CHO cells that expressed recombinant human TSG-6 (rhTSG-6) as a secreted glycoprotein. Paradoxically, both cell number and protein production decreased dramatically when the clones were expanded. The decreases occurred because the protein aggregated the synthesizing CHO cells by binding to the brush border of hyaluronan that is found around many cultured cells. In addition, the rhTSG-6 readily self-aggregated. To address these problems, we added to the medium an inhibitor of hyaluronan synthesis and heparin to compete with the binding of TSG-6 to hyaluronan. Also, we optimized the composition of the culture medium, and transferred the CHO cells from a spinner culture system to a bioreactor that controlled pH and thereby decreased pH-dependent binding properties of the protein. With these and other improvements in the culture conditions, we obtained 57.0 mg ± 9.16 S.D. of rhTSG-6 in 5 or 6 liter of medium. The rhTSG-6 accounted for 18.0% ± 3.76 S.D. of the total protein in the medium. We then purified the protein with a Ni-chelate column that bound the His tag engineered into the C-terminus of the protein followed by an anion exchange column. The yield of the purified monomeric rhTSG-6 was 4.1 mg to 5.6 mg per liter of culture medium. After intravenous injection into mice, the protein had a longer plasma half-life than commercially available rhTSG-6 isolated from a mammalian cell lysate, apparently because it was recovered as a secreted glycoprotein. The bioactivity of the rhTSG-6 in suppressing inflammation was demonstrated in a murine model.
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Affiliation(s)
- Dong-Ki Kim
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Hosoon Choi
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Hidetaka Nishida
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Joo Youn Oh
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Carl Gregory
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Ryang Hwa Lee
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Ji Min Yu
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Jun Watanabe
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Su Yeon An
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Thomas J. Bartosh
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
| | - Darwin J. Prockop
- Institute for Regenerative Medicine, Texas A&M Health Science Center, College of Medicine at Scott and White, Temple, Texas, United States of America
- * E-mail:
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11
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Dyson MR. Fundamentals of Expression in Mammalian Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 896:217-24. [DOI: 10.1007/978-3-319-27216-0_14] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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12
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Jing Y, Zhang C, Fu T, Jiang C, Ma K, Zhang D, Hou S, Dai J, Wang H, Zhang X, Kou G, Guo Y. Combination of dextran sulfate and recombinant trypsin on aggregation of Chinese hamster ovary cells. Cytotechnology 2014; 68:241-8. [PMID: 25087075 DOI: 10.1007/s10616-014-9774-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 07/16/2014] [Indexed: 10/24/2022] Open
Abstract
In laboratory scale therapeutical protein production, cell clumps form typically in shake flasks, which hinders cell growth and decreases protein yield. To minimize clumps during the culture of Chinese hamster ovary cells, we employed the combination of two reagents, dextran sulfate (DS) and recombinant trypsin (r-trypsin). Our results showed that both DS and r-trypsin could diminish cell aggregation when adding them respectively, but clumps were still noticed obviously. In order to further mitigate cell agglomerate, a combination of 1.2 g/L DS and 8.0 mg/L r-trypsin was employed and no clumps were found under the bright field microscope. Strikingly, the highest viable cell density of combination group was increased from 5.12 × 10(6) to 7.13 × 10(6) cells/mL, while the integral of viable cells concentration was raised from 35.13 × 10(6) to 60.87 × 10(6) cells·days/mL, and the culture period was prolonged by 4 days. In addition, the antibody integrity was maintained in the combination group compared with that of the control.
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Affiliation(s)
- Yu Jing
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China.,Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Cunchao Zhang
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Tuo Fu
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Cheng Jiang
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Kai Ma
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Dapeng Zhang
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Sheng Hou
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Jianxin Dai
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Hao Wang
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China.,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China.,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China
| | - Xueguang Zhang
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Geng Kou
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China. .,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China. .,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China.
| | - Yajun Guo
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, China. .,State Key Laboratory of Antibody Medicine and Target Therapy, Shanghai, 201203, China. .,National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody, Shanghai, 201203, China. .,Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China.
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13
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Characterization of growth and Oryctes rhinoceros nudivirus production in attached cultures of the DSIR-HA-1179 coleopteran insect cell line. Cytotechnology 2013; 65:1003-16. [PMID: 23979321 DOI: 10.1007/s10616-013-9632-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 08/10/2013] [Indexed: 10/26/2022] Open
Abstract
The DSIR-HA-1179 coleopteran cell line is a susceptible and permissive host to the Oryctes rhinoceros nudivirus (OrNV), which has been used as a biocontrol agent against the coconut rhinoceros beetle (Oryctes rhinoceros); a pest of palms in the Asia-Pacific region. However, little is known about growth and metabolism of this cell line, knowledge of which is necessary to develop an in vitro large-scale OrNV production process. The strong anchorage-dependent characteristics of the cell line, its particular fragility and its tendency to form dense clumps when manipulated, are the most likely reasons that have precluded further development of the cell line. In order to characterize DSIR-HA-1179 cells, there was first a need for a reliable technique to count the cells. A homogenous cell suspension suitable for enumeration could be produced by treatment with TrypLE Express™ with optimum mean time for cell release calculated as 30 min. The cell line was adapted to grow in four serum-supplemented culture media namely TC-100, IPL-41, Sf-900 II and Sf-900 III and cell growth, glucose consumption, lactate and ammonia production were assessed from static-batch cultures. The maximum viable cell density was reached in Sf-900 II (17.9 × 10(5) cells/ml), with the maximum specific growth rate observed in this culture medium as well (0.0074 h(-1)). Higher production of OrNV was observed in IPL-41 and TC-100 (4.1 × 10(7) TCID50/ml) than in cultures infected in Sf-900 III (2.0 × 10(7) TCID50/ml) and Sf-900 II (1.4 × 10(7) TCID50/ml). At the end of the growth period, glucose was completely consumed in cultures grown in TC-100, while remained in excess in the other three culture media. The cell line produced lactate and ammonia to very low levels in the TC-100 culture medium which is a promising aspect for its cultivation at large-scale.
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14
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