1
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Biomanufacturing Recombinantly Expressed Cripto-1 Protein in Anchorage-Dependent Mammalian Cells Growing in Suspension Bioreactors within a Three-Dimensional Hydrogel Microcarrier. Gels 2023; 9:gels9030243. [PMID: 36975692 PMCID: PMC10048735 DOI: 10.3390/gels9030243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/05/2023] [Accepted: 03/14/2023] [Indexed: 03/22/2023] Open
Abstract
Biotherapeutic soluble proteins that are recombinantly expressed in mammalian cells can pose a challenge when biomanufacturing in three-dimensional (3D) suspension culture systems. Herein, we tested a 3D hydrogel microcarrier for a suspension culture of HEK293 cells overexpressing recombinant Cripto-1 protein. Cripto-1 is an extracellular protein that is involved in developmental processes and has recently been reported to have therapeutic effects in alleviating muscle injury and diseases by regulating muscle regeneration through satellite cell progression toward the myogenic lineage. Cripto-overexpressing HEK293 cell lines were cultured in microcarriers made from poly (ethylene glycol)-fibrinogen (PF) hydrogels, which provided the 3D substrate for cell growth and protein production in stirred bioreactors. The PF microcarriers were designed with sufficient strength to resist hydrodynamic deterioration and biodegradation associated with suspension culture in stirred bioreactors for up to 21 days. The yield of purified Cripto-1 obtained using the 3D PF microcarriers was significantly higher than that obtained with a two-dimensional (2D) culture system. The bioactivity of the 3D-produced Cripto-1 was equivalent to commercially available Cripto-1 in terms of an ELISA binding assay, a muscle cell proliferation assay, and a myogenic differentiation assay. Taken together, these data indicate that 3D microcarriers made from PF can be combined with mammalian cell expression systems to improve the biomanufacturing of protein-based therapeutics for muscle injuries.
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2
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Liu X, Wang J, Xu X, Zhu H, Man K, Zhang J. SDF-1 Functionalized Hydrogel Microcarriers for Skin Flap Repair. ACS Biomater Sci Eng 2022; 8:3576-3588. [PMID: 35899941 DOI: 10.1021/acsbiomaterials.2c00755] [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: 11/28/2022]
Abstract
Critically sized skin flaps used to treat skin defects often suffer from necrosis due to insufficient blood supply. Hence there is an urgent need to improve the survival rate of skin flaps by promoting local angiogenesis. The delivery of growth factor loaded microcarriers have shown promise in enhancing defect repair, however, their rapid clearance from the defect site limits their regenerative potential. Thus, it is critical to develop microcarriers which can promote the sustained release of bioactive factors to effectively stimulate tissue repair. This study aimed to develop a stromal cell-derived factor 1 (SDF-1) loaded microcarrier coated with Matrigel (MC@SDF-1@Mat) to promote skin flap repair. SEM imaging showed that the surface of the microcarrier was coated by a porous Matrigel film. The drug release experiment showed that the Matrigel-coated microcarriers enhanced the sustained release of the model drug methylene blue when compared to uncoated group. MC@SDF-1@Mat significantly promoted the proliferation, migration, and angiogenesis of HUVECs via CCK-8, wound healing assay, and tube formation assay, respectively. Moreover, the murine random skin flap model was further established and treated. It was found that the flap necrosis area in the MC@SDF-1@Mat treated group was significantly reduced. H&E and Masson staining showed the histological structure and collagen organization exhibited a normal phenotype in the MC@SDF-1@Mat treated group. Additionally, CD31 immunohistochemical analysis showed that the MC@SDF-1@Mat treated group exhibited the greatest degree of neovascularization. In conclusion, our SDF-1 functionalized gelatin-based hydrogel microcarrier has potential clinical applications in promoting skin flap repair and drug delivery.
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Affiliation(s)
- Xiaochuan Liu
- Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523710, P.R. China
| | - Jinsi Wang
- Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523710, P.R. China
| | - Xiaoqin Xu
- Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523710, P.R. China
| | - Hong Zhu
- Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523710, P.R. China
| | - Kenny Man
- School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Jingying Zhang
- Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523710, P.R. China
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3
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Large-Scale Microcarrier Culture of Chinese Perch Brain Cell for Viral Vaccine Production in a Stirred Bioreactor. Vaccines (Basel) 2021; 9:vaccines9091003. [PMID: 34579239 PMCID: PMC8471297 DOI: 10.3390/vaccines9091003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/03/2021] [Accepted: 09/03/2021] [Indexed: 11/16/2022] Open
Abstract
Mandarin fish (Siniperca chuatsi) is one of the important cultured fish species in China. Infectious spleen and kidney necrosis virus (ISKNV) and Siniperca Chuatsi rhabdovirus (SCRV) have hindered the development of mandarin fish farming industry. Vaccination is the most effective method for control of viral diseases, however viral vaccine production requires the large-scale culture of cells. Herein, a suspension culture system of Chinese perch brain cell (CPB) was developed on Cytodex 1 microcarrier in a stirred bioreactor. Firstly, CPB cells were cultured using Cytodex 1 microcarrier in 125 mL stirring flasks. With the optimum operational parameters, CPB cells grew well, distributed uniformly, and could fully cover the microcarriers. Then, CPB cells were digested with trypsin and expanded step-by-step with different expansion ratios from the 125 mL stirring bottle to a 500 mL stirring bottle, and finally to a 3-L bioreactor. Results showed that with an expansion ratio of 1:3, we achieved a high cell density level (2.25 × 106 cells/mL) with an efficient use of the microcarriers, which also confirmed the data obtained from the 125 mL stirring flask. Moreover, obvious cytopathic effects (CPE) were observed in the suspended CPB cells post-infection with ISKNV and SCRV. This study provided a large-scale culture system of CPB cells for virus vaccine production.
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4
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de Bournonville S, Geris L, Kerckhofs G. Micro computed tomography with and without contrast enhancement for the characterization of microcarriers in dry and wet state. Sci Rep 2021; 11:2819. [PMID: 33531524 PMCID: PMC7854591 DOI: 10.1038/s41598-021-81998-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 12/21/2020] [Indexed: 01/30/2023] Open
Abstract
In the field of regenerative medicine, microcarriers are used as support matrix for the growth of adherent cells. They are increasingly recognised as promising biomaterials for large scale, cost-effective cell expansion bioreactor processes. However, their individual morphologies can be highly heterogeneous which increases bioprocesses' variability. Additionally, only limited information is available on the microcarriers' 3D morphology and how it affects cell proliferation. Most imaging modalities do not provide sufficient 3D information or have a too limited field of view to appropriately study the 3D morphology. While microfocus X-ray computed tomography (microCT) could be appropriate, many microcarriers are hydrated before in-vitro use. This wet state makes them swell, changing considerably their morphology and making them indistinguishable from the culture solution in regular microCT images due to their physical density close to water. The use of contrast-enhanced microCT (CE-CT) has been recently reported for 3D imaging of soft materials. In this study, we selected a range of commercially available microcarrier types and used a combination of microCT and CE-CT for full 3D morphological characterization of large numbers of microcarriers, both in their dry and wet state. With in-house developed image processing and analysis tools, morphometrics of individual microcarriers were collected. Also, the morphology in wet state was assessed and related to accessible attachment surface area as a function of cell size. The morphological information on all microcarriers was collected in a publicly available database. This work provides a quantitative basis for optimization and modelling of microcarrier based cell expansion processes.
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Affiliation(s)
- Sébastien de Bournonville
- Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium
- Biomechanics Section, Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
- Biomechanics Research Unit, ULiège, Liège, Belgium
| | - Liesbet Geris
- Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium
- Biomechanics Section, Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
- Biomechanics Research Unit, ULiège, Liège, Belgium
| | - Greet Kerckhofs
- Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium.
- Biomechanics Lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium.
- Department Materials Engineering, KU Leuven, Leuven, Belgium.
- Institute of Experimental and Clinical Research, UCLouvain, Woluwé-Saint-Lambert, Belgium.
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5
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de Sá da Silva J, Severino P, Wodewotzky TI, Covas DT, Swiech K, Cavalheiro Marti L, Torres Suazo CA. Mesenchymal stromal cells maintain the major quality attributes when expanded in different bioreactor systems. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107693] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Balistreri CR, De Falco E, Bordin A, Maslova O, Koliada A, Vaiserman A. Stem cell therapy: old challenges and new solutions. Mol Biol Rep 2020; 47:3117-3131. [PMID: 32128709 DOI: 10.1007/s11033-020-05353-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 02/26/2020] [Indexed: 12/11/2022]
Abstract
Stem cell therapy (SCT), born as therapeutic revolution to replace pharmacological treatments, remains a hope and not yet an effective solution. Accordingly, stem cells cannot be conceivable as a "canonical" drug, because of their unique biological properties. A new reorientation in this field is emerging, based on a better understanding of stem cell biology and use of cutting-edge technologies and innovative disciplines. This will permit to solve the gaps, failures, and long-term needs, such as the retention, survival and integration of stem cells, by employing pharmacology, genetic manipulation, biological or material incorporation. Consequently, the clinical applicability of SCT for chronic human diseases will be extended, as well as its effectiveness and success, leading to long-awaited medical revolution. Here, some of these aspects are summarized, reviewing and discussing recent advances in this rapidly developing research field.
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Affiliation(s)
- Carmela Rita Balistreri
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (Bi.N.D.), University of Palermo, Palermo, Italy.
| | - Elena De Falco
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Rome, Italy
- Mediterranea Cardiocentro, Napoli, Italy
| | - Antonella Bordin
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Rome, Italy
| | - Olga Maslova
- National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine
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7
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Chen R, Li L, Feng L, Luo Y, Xu M, Leong KW, Yao R. Biomaterial-assisted scalable cell production for cell therapy. Biomaterials 2019; 230:119627. [PMID: 31767445 DOI: 10.1016/j.biomaterials.2019.119627] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 11/01/2019] [Accepted: 11/11/2019] [Indexed: 12/24/2022]
Abstract
Cell therapy, the treatment of diseases using living cells, offers a promising clinical approach to treating refractory diseases. The global market for cell therapy is growing rapidly, and there is an increasing demand for automated methods that can produce large quantities of high quality therapeutic cells. Biomaterials can be used during cell production to establish a biomimetic microenvironment that promotes cell adhesion and proliferation while maintaining target cell genotype and phenotype. Here we review recent progress and emerging techniques in biomaterial-assisted cell production. The increasing use of auxiliary biomaterials and automated production methods provides an opportunity to improve quality control and increase production efficiency using standardized GMP-compliant procedures.
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Affiliation(s)
- Ruoyu Chen
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Ling Li
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Lu Feng
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yixue Luo
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Mingen Xu
- Key Laboratory of Medical Information and 3D Bioprinting of Zhejiang Province, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Kam W Leong
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA.
| | - Rui Yao
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
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8
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Derakhti S, Safiabadi-Tali SH, Amoabediny G, Sheikhpour M. Attachment and detachment strategies in microcarrier-based cell culture technology: A comprehensive review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109782. [DOI: 10.1016/j.msec.2019.109782] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 04/11/2019] [Accepted: 05/20/2019] [Indexed: 12/27/2022]
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9
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Baakdhah T, van der Kooy D. Expansion of retinal stem cells and their progeny using cell microcarriers in a bioreactor. Biotechnol Prog 2019; 35:e2800. [DOI: 10.1002/btpr.2800] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 01/10/2019] [Accepted: 02/24/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Tahani Baakdhah
- Institute of Medical ScienceUniversity of Toronto Toronto Ontario Canada
| | - Derek van der Kooy
- Institute of Medical ScienceUniversity of Toronto Toronto Ontario Canada
- Department of Molecular GeneticsUniversity of Toronto Toronto Ontario Canada
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10
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Tavassoli H, Alhosseini SN, Tay A, Chan PP, Weng Oh SK, Warkiani ME. Large-scale production of stem cells utilizing microcarriers: A biomaterials engineering perspective from academic research to commercialized products. Biomaterials 2018; 181:333-346. [DOI: 10.1016/j.biomaterials.2018.07.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 07/07/2018] [Accepted: 07/10/2018] [Indexed: 12/22/2022]
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11
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Hsu CYM, Walsh T, Borys BS, Kallos MS, Rancourt DE. An Integrated Approach toward the Biomanufacturing of Engineered Cell Therapy Products in a Stirred-Suspension Bioreactor. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2018; 9:376-389. [PMID: 30038941 PMCID: PMC6054699 DOI: 10.1016/j.omtm.2018.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 04/23/2018] [Indexed: 12/15/2022]
Abstract
Recent advances in stem cell biology have accelerated the pre-clinical development of cell-based therapies for degenerative and chronic diseases. The success of this growing area hinges upon the concomitant development of scalable manufacturing platforms that can produce clinically relevant quantities of cells for thousands of patients. Current biomanufacturing practices for cell therapy products are built on a model previously optimized for biologics, wherein stable cell lines are established first, followed by large-scale production in the bioreactor. This “two-step” approach can be costly, labor-intensive, and time-consuming, particularly for cell therapy products that must be individually sourced from patients or compatible donors. In this report, we describe a “one-step” integrated approach toward the biomanufacturing of engineered cell therapy products by direct transfection of primary human fibroblast in a continuous stirred-suspension bioreactor. We optimized the transfection efficiency by testing rate-limiting factors, including cell seeding density, agitation rate, oxygen saturation, microcarrier type, and serum concentration. By combining the genetic modification step with the large-scale expansion step, this not only removes the need for manual handing of cells in planar culture dishes, but also enables the biomanufacturing process to be streamlined and automated in one fully enclosed bioreactor.
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Affiliation(s)
- Charlie Y M Hsu
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Tylor Walsh
- Pharmaceutical Production Research Facility, Schulich School of Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.,Biomedical Engineering Graduate Program, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Breanna S Borys
- Pharmaceutical Production Research Facility, Schulich School of Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.,Biomedical Engineering Graduate Program, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Michael S Kallos
- Pharmaceutical Production Research Facility, Schulich School of Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.,Biomedical Engineering Graduate Program, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.,Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Derrick E Rancourt
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.,Department of Oncology, Faculty of Medicine and Dentistry, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.,Department of Medical Genetics, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
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12
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Weegman BP, Essawy A, Nash P, Carlson AL, Voltzke KJ, Geng Z, Jahani M, Becker BB, Papas KK, Firpo MT. Nutrient Regulation by Continuous Feeding for Large-scale Expansion of Mammalian Cells in Spheroids. J Vis Exp 2016:52224. [PMID: 27768027 PMCID: PMC5092061 DOI: 10.3791/52224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In this demonstration, spheroids formed from the β-TC6 insulinoma cell line were cultured as a model of manufacturing a mammalian islet cell product to demonstrate how regulating nutrient levels can improve cell yields. In previous studies, bioreactors facilitated increased culture volumes over static cultures, but no increase in cell yields were observed. Limitations in key nutrients such as glucose, which were consumed between batch feedings, can lead to limitations in cell expansion. Large fluctuations in glucose levels were observed, despite the increase in glucose concentrations in the media. The use of continuous feeding systems eliminated fluctuations in glucose levels, and improved cell growth rates when compared with batch fed static and SSB culture methods. Additional increases in growth rates were observed by adjusting the feed rate based on calculated nutrient consumption, which allowed the maintenance of physiological glucose over three weeks in culture. This method can also be adapted for other cell types.
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13
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Agabalyan NA, Borys BS, Sparks HD, Boon K, Raharjo EW, Abbasi S, Kallos MS, Biernaskie J. Enhanced Expansion and Sustained Inductive Function of Skin-Derived Precursor Cells in Computer-Controlled Stirred Suspension Bioreactors. Stem Cells Transl Med 2016; 6:434-443. [PMID: 28191777 PMCID: PMC5442802 DOI: 10.5966/sctm.2016-0133] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 07/28/2016] [Indexed: 12/12/2022] Open
Abstract
Endogenous dermal stem cells (DSCs) reside in the adult hair follicle mesenchyme and can be isolated and grown in vitro as self‐renewing colonies called skin‐derived precursors (SKPs). Following transplantation into skin, SKPs can generate new dermis and reconstitute the dermal papilla and connective tissue sheath, suggesting they could have important therapeutic value for the treatment of skin disease (alopecia) or injury. Controlled cell culture processes must be developed to efficiently and safely generate sufficient stem cell numbers for clinical use. Compared with static culture, stirred‐suspension bioreactors generated fivefold greater expansion of viable SKPs. SKPs from each condition were able to repopulate the dermal stem cell niche within established hair follicles. Both conditions were also capable of inducing de novo hair follicle formation and exhibited bipotency, reconstituting the dermal papilla and connective tissue sheath, although the efficiency was significantly reduced in bioreactor‐expanded SKPs compared with static conditions. We conclude that automated bioreactor processing could be used to efficiently generate large numbers of autologous DSCs while maintaining their inherent regenerative function. Stem Cells Translational Medicine2017;6:434–443
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Affiliation(s)
- Natacha A. Agabalyan
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Breanna S. Borys
- Pharmaceutical Production Research Facility, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
| | - Holly D. Sparks
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Kathryn Boon
- Pharmaceutical Production Research Facility, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, Alberta, Canada
| | - Eko W. Raharjo
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Sepideh Abbasi
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Michael S. Kallos
- Pharmaceutical Production Research Facility, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, Alberta, Canada
| | - Jeff Biernaskie
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, Calgary, Alberta, Canada
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14
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Surrao DC, Boon K, Borys B, Sinha S, Kumar R, Biernaskie J, Kallos MS. Large-scale expansion of human skin-derived precursor cells (hSKPs) in stirred suspension bioreactors. Biotechnol Bioeng 2016; 113:2725-2738. [PMID: 27345530 DOI: 10.1002/bit.26040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 06/06/2016] [Accepted: 06/20/2016] [Indexed: 01/07/2023]
Abstract
Human skin-derived precursor cells (hSKPs) are multipotent adult stem cells found in the dermis of human skin. Incorporation of hSKPs into split-thickness skin grafts (STSGs), the current gold standard to treat severe burns or tissue resections, has been proposed as a treatment option to enhance skin wound healing and tissue function. For this approach to be clinically viable substantial quantities of hSKPs are required, which is the rate-limiting step, as only a few thousand hSKPs can be isolated from an autologous skin biopsy without causing donor site morbidity. In order to produce sufficient quantities of clinically viable cells, we have developed a bioprocess capable of expanding hSKPs as aggregates in stirred suspension bioreactors (SSBs). In this study, we found hSKPs from adult donors to expand significantly more (P < 0.05) at 60 rpm in SSBs than in static cultures. Furthermore, the utility of the SSBs, at 60 rpm is demonstrated by serial passaging of hSKPs from a small starting population, which can be isolated from an autologous skin biopsy without causing donor site morbidity. At 60 rpm, aggregates were markedly smaller and did not experience oxygen diffusional limitations, as seen in hSKPs cultured at 40 rpm. While hSKPs also grew at 80 rpm (0.74 Pa) and 100 rpm (1 Pa), they produced smaller aggregates due to high shear stress. The pH of the media in all the SSBs was closer to biological conditions and significantly different (P < 0.05) from static cultures, which recorded acidic pH conditions. The nutrient concentrations of the media in all the SSBs and static cultures did not drop below acceptable limits. Furthermore, there was no significant build-up of waste products to limit hSKP expansion in the SSBs. In addition, hSKP markers were maintained in the 60 rpm SSB as demonstrated by immunocytochemistry. This method of growing hSKPs in a batch culture at 60 rpm in a SSB represents an important first step in developing an automated bioprocess to produce substantial numbers of clinically viable hSKPs aimed at regenerating the dermis to improve healing of severe skin wounds. Biotechnol. Bioeng. 2016;113: 2725-2738. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Denver C Surrao
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada.,Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada
| | - Kathryn Boon
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada.,Biomedical Engineering Graduate Program, University of Calgary, Calgary, Alberta, Canada
| | - Breanna Borys
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada.,Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada
| | - Sarthak Sinha
- Faculty of Veterinary Medicine, Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Ranjan Kumar
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jeff Biernaskie
- Faculty of Veterinary Medicine, Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Michael S Kallos
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada. .,Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada. .,Biomedical Engineering Graduate Program, University of Calgary, Calgary, Alberta, Canada.
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15
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Shakhbazau A, Mirfeizi L, Walsh T, Wobma HM, Kumar R, Singh B, Kallos MS, Midha R. Inter-microcarrier transfer and phenotypic stability of stem cell-derived Schwann cells in stirred suspension bioreactor culture. Biotechnol Bioeng 2016; 113:393-402. [PMID: 26301523 DOI: 10.1002/bit.25813] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 07/20/2015] [Accepted: 08/17/2015] [Indexed: 11/10/2022]
Abstract
Emerging bioreactor technologies offer an effective way for scaled-up production of large numbers of cells for cell therapy applications. One of the clinical paradigms where cell therapy can be an asset is restorative neurosciences. Nerve repair can benefit from the injections of stem cells and/or Schwann cells, acting as a source for axon myelination, myelin debris clearance, and trophic support. We have adapted microcarrier-based suspension bioreactor culture for Schwann cells (SCs) differentiated from a new stem cell source - skin-derived precursors (SKPs). SKP-derived SCs attach and grow on different types of microcarriers in both static and stirred culture, with Cytodex 3 and CultiSpher-S found most effective. Inter-microcarrier migration of SKP-SCs represents a key mechanism for rapid expansion and colonization in stirred suspension culture. We have shown that microcarrier-expanded SKP-SCs cells express Schwann cell markers p75-NTR, GFAP and S100 and retain their key ability to myelinate axons both in vitro and in vivo. Scaled-up microcarrier-based production of SKP-SCs in suspension bioreactors appears feasible for timely generation of sufficient cell numbers for nerve repair strategies.
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Affiliation(s)
- Antos Shakhbazau
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada.
| | - Leila Mirfeizi
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Canada
| | - Tylor Walsh
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Canada
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, Canada
| | - Holly M Wobma
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Canada
| | - Ranjan Kumar
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - Bhagat Singh
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Michael S Kallos
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Canada
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, Canada
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, Canada
| | - Rajiv Midha
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
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Kumar A, Starly B. Large scale industrialized cell expansion: producing the critical raw material for biofabrication processes. Biofabrication 2015; 7:044103. [DOI: 10.1088/1758-5090/7/4/044103] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Knöspel F, Freyer N, Stecklum M, Gerlach JC, Zeilinger K. Periodic harvesting of embryonic stem cells from a hollow-fiber membrane based four-compartment bioreactor. Biotechnol Prog 2015; 32:141-51. [DOI: 10.1002/btpr.2182] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/02/2015] [Indexed: 02/01/2023]
Affiliation(s)
- Fanny Knöspel
- Bioreactor Group, Berlin Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitätsmedizin Berlin; Berlin Germany
| | - Nora Freyer
- Bioreactor Group, Berlin Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitätsmedizin Berlin; Berlin Germany
| | - Maria Stecklum
- Experimental Pharmacology and Oncology Berlin-Buch GmbH; Berlin Germany
| | - Jörg C. Gerlach
- McGowan Inst. for Regenerative Medicine, University of Pittsburgh; Pittsburgh PA
| | - Katrin Zeilinger
- Bioreactor Group, Berlin Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitätsmedizin Berlin; Berlin Germany
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Allazetta S, Lutolf MP. Stem cell niche engineering through droplet microfluidics. Curr Opin Biotechnol 2015; 35:86-93. [PMID: 26051090 DOI: 10.1016/j.copbio.2015.05.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/12/2015] [Accepted: 05/13/2015] [Indexed: 01/25/2023]
Abstract
Stem cells reside in complex niches in which their behaviour is tightly regulated by various biochemical and biophysical signals. In order to unveil some of the crucial stem cell-niche interactions and expedite the implementation of stem cells in clinical and pharmaceutical applications, in vitro methodologies are being developed to reconstruct key features of stem cell niches. Recently, droplet-based microfluidics has emerged as a promising strategy to build stem cell niche models in a miniaturized and highly precise fashion. This review highlights current advances in using droplet microfluidics in stem cell biology. We also discuss recent efforts in which microgel technology has been interfaced with high-throughput analyses to engender screening paradigms with an unparalleled potential for basic and applied biological studies.
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Affiliation(s)
- Simone Allazetta
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Matthias P Lutolf
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Institute of Chemical Sciences and Engineering, School of Basic Sciences, EPFL, Switzerland.
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19
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Tong Z, Solanki A, Hamilos A, Levy O, Wen K, Yin X, Karp JM. Application of biomaterials to advance induced pluripotent stem cell research and therapy. EMBO J 2015; 34:987-1008. [PMID: 25766254 PMCID: PMC4406648 DOI: 10.15252/embj.201490756] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/25/2015] [Accepted: 02/17/2015] [Indexed: 12/19/2022] Open
Abstract
Derived from any somatic cell type and possessing unlimited self-renewal and differentiation potential, induced pluripotent stem cells (iPSCs) are poised to revolutionize stem cell biology and regenerative medicine research, bringing unprecedented opportunities for treating debilitating human diseases. To overcome the limitations associated with safety, efficiency, and scalability of traditional iPSC derivation, expansion, and differentiation protocols, biomaterials have recently been considered. Beyond addressing these limitations, the integration of biomaterials with existing iPSC culture platforms could offer additional opportunities to better probe the biology and control the behavior of iPSCs or their progeny in vitro and in vivo. Herein, we discuss the impact of biomaterials on the iPSC field, from derivation to tissue regeneration and modeling. Although still exploratory, we envision the emerging combination of biomaterials and iPSCs will be critical in the successful application of iPSCs and their progeny for research and clinical translation.
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Affiliation(s)
- Zhixiang Tong
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
| | - Aniruddh Solanki
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
| | - Allison Hamilos
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
| | - Oren Levy
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
| | - Kendall Wen
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
| | - Xiaolei Yin
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Jeffrey M Karp
- Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA
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20
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Gupta P, Ismadi MZ, Verma PJ, Fouras A, Jadhav S, Bellare J, Hourigan K. Optimization of agitation speed in spinner flask for microcarrier structural integrity and expansion of induced pluripotent stem cells. Cytotechnology 2014; 68:45-59. [PMID: 25062986 DOI: 10.1007/s10616-014-9750-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 06/05/2014] [Indexed: 12/20/2022] Open
Abstract
In recent times, the study and use of induced pluripotent stem cells (iPSC) have become important in order to avoid the ethical issues surrounding the use of embryonic stem cells. Therapeutic, industrial and research based use of iPSC requires large quantities of cells generated in vitro. Mammalian cells, including pluripotent stem cells, have been expanded using 3D culture, however current limitations have not been overcome to allow a uniform, optimized platform for dynamic culture of pluripotent stem cells to be achieved. In the current work, we have expanded mouse iPSC in a spinner flask using Cytodex 3 microcarriers. We have looked at the effect of agitation on the microcarrier survival and optimized an agitation speed that supports bead suspension and iPS cell expansion without any bead breakage. Under the optimized conditions, the mouse iPSC were able to maintain their growth, pluripotency and differentiation capability. We demonstrate that microcarrier survival and iPS cell expansion in a spinner flask are reliant on a very narrow range of spin rates, highlighting the need for precise control of such set ups and the need for improved design of more robust systems.
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Affiliation(s)
- Priyanka Gupta
- IITB Monash Research Academy, Mumbai, India. .,Department of Chemical Engineering, IIT Bombay, Mumbai, India. .,Department of Chemical Engineering, Monash University, Melbourne, VIC, Australia. .,Division of Biological Engineering, Monash University, Melbourne, VIC, Australia.
| | - Mohd-Zulhilmi Ismadi
- Division of Biological Engineering, Monash University, Melbourne, VIC, Australia.,Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, Australia
| | - Paul J Verma
- Division of Biological Engineering, Monash University, Melbourne, VIC, Australia.,South Australian Research and Development Institute, Rosedale, SA, Australia
| | - Andreas Fouras
- Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, Australia
| | - Sameer Jadhav
- Department of Chemical Engineering, IIT Bombay, Mumbai, India
| | - Jayesh Bellare
- Department of Chemical Engineering, IIT Bombay, Mumbai, India
| | - Kerry Hourigan
- Division of Biological Engineering, Monash University, Melbourne, VIC, Australia.,Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, Australia
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Liu N, Li Y, Yang ST. Expansion of embryonic stem cells in suspension and fibrous bed bioreactors. J Biotechnol 2014; 178:54-64. [DOI: 10.1016/j.jbiotec.2014.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 02/14/2014] [Accepted: 03/06/2014] [Indexed: 12/23/2022]
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22
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Fernandes-Platzgummer A, Diogo MM, Lobato da Silva C, Cabral JM. Maximizing mouse embryonic stem cell production in a stirred tank reactor by controlling dissolved oxygen concentration and continuous perfusion operation. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2013.11.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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23
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Sart S, Agathos SN, Li Y. Engineering stem cell fate with biochemical and biomechanical properties of microcarriers. Biotechnol Prog 2013; 29:1354-66. [PMID: 24124017 DOI: 10.1002/btpr.1825] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 09/29/2013] [Indexed: 12/28/2022]
Abstract
Microcarriers have been widely used for various biotechnology applications because of their high scale-up potential, high reproducibility in regulating cellular behavior, and well-documented compliance with current Good Manufacturing Practices (cGMP). Recently, microcarriers have been emerging as a novel approach for stem cell expansion and differentiation, enabling potential scale-up of stem cell-derived products in large bioreactors. This review summarizes recent advances of using microcarriers in mesenchymal stem cell (MSC) and pluripotent stem cell (PSC) cultures. From the reported data, efficient expansion and differentiation of stem cells on microcarriers rely on their ability to modulate cell shape (i.e. round or spreading) and cell organization (i.e. aggregate size). Nonetheless, current screening of microcarriers remains empirical, and accurate understanding of how stem cells interact with microcarriers still remains unknown. This review suggests that accurate characterization of biochemical and biomechanical properties of microcarriers is required to fully exploit their potential in regulating stem cell fate decision. Due to the variety of microcarriers, such detailed analyses should lead to the rational design of application-specific microcarriers, enabling the exploitation of reproducible effects for large scale biomedical applications.
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Affiliation(s)
- Sébastien Sart
- Dept. of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL
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24
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Ferrari C, Olmos E, Balandras F, Tran N, Chevalot I, Guedon E, Marc A. Investigation of growth conditions for the expansion of porcine mesenchymal stem cells on microcarriers in stirred cultures. Appl Biochem Biotechnol 2013; 172:1004-17. [PMID: 24142358 DOI: 10.1007/s12010-013-0586-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 10/03/2013] [Indexed: 12/17/2022]
Abstract
The extensive use of mesenchymal stem cells (MCS) in tissue engineering and cell therapy increases the necessity to improve their expansion. Among these, porcine MCS are valuable models for tissue engineering and are classically expanded in static T-flasks. In this work, different processes of stirred cultures were evaluated and compared. First, the effect of glucose, glutamine, antioxidant, and growth factors concentrations on porcine MSC expansion were analyzed in a suitable medium by performing kinetic studies. Results showed that a lower glucose concentration (5.5 mM) enabled to increase maximal cell concentration by 40 % compared with a higher one (25 mM), while addition of 2 to 6 mM of glutamine increased maximal cell concentration by more than 25 % compared with no glutamine supplementation. Moreover, supplementation with 1 μM thioctic acid increased maximal cell concentration by 40 % compared with no supplementation. Using this adapted medium, microcarriers cultures were performed and compared with T-flasks expansion. Porcine MSC were shown to be able to proliferate on the five types of microcarriers tested. Moreover, cultures on Cytodex 1, Cytopore 2, and Cultispher G exhibited a MSC growth rate more than 40 % higher compared with expansion in T-flasks, while MSC metabolism was similar.
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Affiliation(s)
- Caroline Ferrari
- Laboratoire Réactions et Génie des Procédés, CNRS UMR 7274, Université de Lorraine, 2 avenue de la forêt de Haye, TSA 40602, 54518, Vandœuvre-lès-Nancy Cedex, France
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25
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Brodsky AN, Zhang J, Visconti RP, Harcum SW. Expansion of mesenchymal stem cells under atmospheric carbon dioxide. Biotechnol Prog 2013; 29:1298-306. [PMID: 23894049 DOI: 10.1002/btpr.1782] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 07/09/2013] [Indexed: 12/12/2022]
Abstract
Stem cells are needed for an increasing number of scientific applications, including both fundamental research and clinical disease treatment. To meet this rising demand, improved expansion methods to generate high quantities of high quality stem cells must be developed. Unfortunately, the bicarbonate buffering system - which relies upon an elevated CO2 environment - typically used to maintain pH in stem cell cultures introduces several unnecessary limitations in bioreactor systems. In addition to artificially high dissolved CO2 levels negatively affecting cell growth, but more importantly, the need to sparge CO2 into the system complicates the ability to control culture parameters. This control is especially important for stem cells, whose behavior and phenotype is highly sensitive to changes in culture conditions such as dissolved oxygen and pH. As a first step, this study developed a buffer to support expansion of mesenchymal stem cells (MSC) under an atmospheric CO2 environment in static cultures. MSC expanded under atmospheric CO2 with this buffer achieved equivalent growth rates without adaptation compared to those grown in standard conditions and also maintained a stem cell phenotype, self-renewal properties, and the ability to differentiate into multiple lineages after expansion.
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Affiliation(s)
- Arthur Nathan Brodsky
- Dept. of Bioengineering, Clemson University, 301 Rhodes Research Center, Clemson, SC, 29634
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Lee HC, Ling QD, Yu WC, Hung CM, Kao TC, Huang YW, Higuchi A. Drug-resistant colon cancer cells produce high carcinoembryonic antigen and might not be cancer-initiating cells. DRUG DESIGN DEVELOPMENT AND THERAPY 2013; 7:491-502. [PMID: 23818760 PMCID: PMC3693723 DOI: 10.2147/dddt.s45890] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Purpose We evaluated the higher levels of carcinoembryonic antigen (CEA) secreted by the LoVo human colon carcinoma cells in a medium containing anticancer drugs. Drug-resistant LoVo cells were analyzed by subcutaneously xenotransplanting them into mice. The aim of this study was to evaluate whether the drug-resistant cells isolated in this study were cancer-initiating cells, known also as cancer stem cells (CSCs). Methods The production of CEA was investigated in LoVo cells that were cultured with 0–10 mM of anticancer drugs, and we evaluated the increase in CEA production by the LoVo cells that were stimulated by anticancer drug treatment. The expression of several CSC markers in LoVo cells treated with anticancer drugs was also evaluated. Following anticancer drug treatment, LoVo cells were injected subcutaneously into the flanks of severe combined immunodeficiency mice in order to evaluate the CSC fraction. Results Production of CEA by LoVo cells was stimulated by the addition of anticancer drugs. Drug-resistant LoVo cells expressed lower levels of CSC markers, and LoVo cells treated with any of the anticancer drugs tested did not generate tumors within 8 weeks from when the cells were injected subcutaneously into severe combined immunodeficiency mice. These results suggest that the drug-resistant LoVo cells have a smaller population of CSCs than the untreated LoVo cells. Conclusion Production of CEA by LoVo cells can be stimulated by the addition of anticancer drugs. The drug-resistant subpopulation of LoVo colon cancer cells could stimulate the production of CEA, but these cells did not act as CSCs in in vivo tumor generation experiments.
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Affiliation(s)
- Hsin-chung Lee
- Graduate Institute of Systems Biology and Bioinformatics, National Central University, Jhongli, Taoyuan
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Liu N, Li Y, Yang ST. Microfibrous carriers for integrated expansion and neural differentiation of embryonic stem cells in suspension bioreactor. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Allazetta S, Hausherr TC, Lutolf MP. Microfluidic synthesis of cell-type-specific artificial extracellular matrix hydrogels. Biomacromolecules 2013; 14:1122-31. [PMID: 23439131 DOI: 10.1021/bm4000162] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Droplet microfluidic technology is applied for the high-throughput synthesis via Michael-type addition of reactive, micrometer-sized poly(ethylene glycol) (PEG) hydrogels ("microgels") with precisely controlled dimension and physicochemical properties. A versatile chemical scheme is used to modify the reactive PEG microgels with tethered biomolecules to tune their bioactive properties for the bioreactor culture and manipulation of various (stem) cell types.
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Affiliation(s)
- Simone Allazetta
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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Abstract
Controlled expansion and differentiation of pluripotent stem cells (PSCs) using reproducible, high-throughput methods could accelerate stem cell research for clinical therapies. Hydrodynamic culture systems for PSCs are increasingly being used for high-throughput studies and scale-up purposes; however, hydrodynamic cultures expose PSCs to complex physical and chemical environments that include spatially and temporally modulated fluid shear stresses and heterogeneous mass transport. Furthermore, the effects of fluid flow on PSCs cannot easily be attributed to any single environmental parameter since the cellular processes regulating self-renewal and differentiation are interconnected and the complex physical and chemical parameters associated with fluid flow are thus difficult to independently isolate. Regardless of the challenges posed by characterizing fluid dynamic properties, hydrodynamic culture systems offer several advantages over traditional static culture, including increased mass transfer and reduced cell handling. This article discusses the challenges and opportunities of hydrodynamic culture environments for the expansion and differentiation of PSCs in microfluidic systems and larger-volume suspension bioreactors. Ultimately, an improved understanding of the effects of hydrodynamics on the self-renewal and differentiation of PSCs could yield improved bioprocessing technologies to attain scalable PSC culture strategies that will probably be requisite for the development of therapeutic and diagnostic applications.
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31
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Yuan Y, Kallos MS, Hunter C, Sen A. Improved expansion of human bone marrow-derived mesenchymal stem cells in microcarrier-based suspension culture. J Tissue Eng Regen Med 2012; 8:210-25. [PMID: 22689330 DOI: 10.1002/term.1515] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 01/29/2012] [Accepted: 02/28/2012] [Indexed: 12/13/2022]
Abstract
Human bone marrow-derived mesenchymal stem cells (hBM-MSCs) have potential clinical utility in the treatment of a multitude of ailments and diseases, due to their relative ease of isolation from patients and their capacity to form many cell types. However, hBM-MSCs are sparse, and can only be isolated in very small quantities, thereby hindering the development of clinical therapies. The use of microcarrier-based stirred suspension bioreactors to expand stem cell populations offers an approach to overcome this problem. Starting with standard culture protocols commonly reported in the literature, we have successfully developed new protocols that allow for improved expansion of hBM-MSCs in stirred suspension bioreactors using CultiSpher-S microcarriers. Cell attachment was facilitated by using intermittent bioreactor agitation, removing fetal bovine serum, modifying the stirring speed and manipulating the medium pH. By manipulating these parameters, we enhanced the cell attachment efficiency in the first 8 h post-inoculation from 18% (standard protocol) to 72% (improved protocol). Following microcarrier attachment, agitation rate was found to impact cell growth kinetics, whereas feeding had no significant effect. By serially subculturing hBM-MSCs using the new suspension bioreactor protocols, we managed to obtain cell fold increases of 10³ within 30 days, which was superior to the 200-fold increase obtained using the standard protocol. The cells were found to retain their defining characteristics after several passages in suspension. This new bioprocess represents a more efficient approach for generating large numbers of hBM-MSCs in culture, which in turn should facilitate the development of new stem cell-based therapies.
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Affiliation(s)
- Yifan Yuan
- Pharmaceutical Production Research Facility (PPRF), Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
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