1
|
Ghosh J, Akiyama Y, Haraguchi Y, Yamanaka K, Asahi T, Nakao Y, Shimizu T. Proliferation of mammalian cells with Chlorococcum littorale algal compounds without serum support. Biotechnol Prog 2024; 40:e3402. [PMID: 37904720 DOI: 10.1002/btpr.3402] [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: 04/13/2023] [Revised: 09/26/2023] [Accepted: 10/15/2023] [Indexed: 11/01/2023]
Abstract
In recent years, serum-free medium for mammalian cell cultivation has attracted a lot of attention, considering the high cost of production and environmental load involved in developing the conventional animal sera. The use of alternative growth-promoting products in mammalian cell cultivation such as extracts from microalgae has proven to be quite beneficial and environmental-friendly. This research aims to cultivate mammalian cells with growth-promoting factors derived from Chlorococcum littorale. We have established a simple extraction using the ultrasonication method and applied the extract in place of serum on mammalian C2C12 cell lines, 3T3 cell lines, and CHO cell lines to compare and analyze the effectiveness of the extract. Cell passage was conducted in a suspended culture condition with the addition of the extract. The results indicate that the extract from microalgae shows a high proliferation rate in all cell lines without fetal bovine serum. Moreover, it is eco-friendly and has huge potential to replace the traditional cell culture system. It could be applied in the fields of regenerative medicine, gene/cell therapies, as well as cultured meat production.
Collapse
Affiliation(s)
- Jayeesha Ghosh
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
- Institute of Advanced Biomedical Engineering and Science, TWIns, Tokyo Women's Medical University, Tokyo, Japan
| | - Yoshikatsu Akiyama
- Institute of Advanced Biomedical Engineering and Science, TWIns, Tokyo Women's Medical University, Tokyo, Japan
| | - Yuji Haraguchi
- Institute of Advanced Biomedical Engineering and Science, TWIns, Tokyo Women's Medical University, Tokyo, Japan
| | - Kumiko Yamanaka
- Institute of Advanced Biomedical Engineering and Science, TWIns, Tokyo Women's Medical University, Tokyo, Japan
| | - Toru Asahi
- Department of Life Science and Medical Bioscience, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Yoichi Nakao
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Tatsuya Shimizu
- Institute of Advanced Biomedical Engineering and Science, TWIns, Tokyo Women's Medical University, Tokyo, Japan
| |
Collapse
|
2
|
Kulus M, Jankowski M, Kranc W, Golkar Narenji A, Farzaneh M, Dzięgiel P, Zabel M, Antosik P, Bukowska D, Mozdziak P, Kempisty B. Bioreactors, scaffolds and microcarriers and in vitro meat production-current obstacles and potential solutions. Front Nutr 2023; 10:1225233. [PMID: 37743926 PMCID: PMC10513094 DOI: 10.3389/fnut.2023.1225233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 08/21/2023] [Indexed: 09/26/2023] Open
Abstract
In vitro meat production presents a potential viable alternative for meat consumption, which could provide the consumer with a product indistinguishable from the original, with very similar nutritional and culinary values. Indeed, the alternative products currently accessible often lack comparable nutritional value or culinary attributes to their animal-derived counterparts. This creates challenges for their global acceptance, particularly in countries where meat consumption holds cultural significance. However, while cultured meat research has been progressing rapidly in recent years, some significant obstacles still need to be overcome before its possible commercialization. Hence, this review summarizes the most current knowledge regarding the history of cultured meat, the currently used cell sources and methods used for the purpose of in vitro meat production, with particular focus on the role of bioreactors, scaffolds and microcarriers in overcoming the current obstacles. The authors put the potential microcarrier and scaffold-based solutions in a context, discussing the ways in which they can impact the way forward for the technology, including the use of considering the potential practical and societal barriers to implementing it as a viable food source worldwide.
Collapse
Affiliation(s)
- Magdalena Kulus
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Toruń, Toruń, Poland
| | - Maurycy Jankowski
- Department of Computer Science and Statistics, Poznan University of Medical Sciences, Poznan, Poland
- Department of Histology and Embryology, Poznan University of Medical Sciences, Poznan, Poland
| | - Wiesława Kranc
- Department of Anatomy, Poznan University of Medical Sciences, Poznań, Poland
| | - Afsaneh Golkar Narenji
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
| | - Maryam Farzaneh
- Fertility, Infertility and Perinatology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Piotr Dzięgiel
- Division of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, Wroclaw, Poland
| | - Maciej Zabel
- Division of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, Wroclaw, Poland
- Division of Anatomy and Histology, University of Zielona Góra, Zielona Góra, Poland
| | - Paweł Antosik
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Toruń, Toruń, Poland
| | - Dorota Bukowska
- Department of Basic and Preclinical Sciences, Institute of Veterinary Medicine, Nicolaus Copernicus University in Toruń, Toruń, Poland
| | - Paul Mozdziak
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
- Physiology Graduate Faculty, North Carolina State University, Raleigh, NC, United States
| | - Bartosz Kempisty
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Toruń, Toruń, Poland
- Physiology Graduate Faculty, North Carolina State University, Raleigh, NC, United States
- Division of Anatomy, Department of Human Morphology and Embryology, Wroclaw Medical University, Wroclaw, Poland
- Department of Obstetrics and Gynecology, University Hospital and Masaryk University, Brno, Czechia
| |
Collapse
|
3
|
Wen Y, Chen Y, Wu W, Zhang H, Peng Z, Yao X, Zhang X, Jiang W, Liao Y, Xie Y, Shen X, Sun H, Hu J, Liu H, Chen X, Chen J, Ouyang H. Hyperplastic Human Macromass Cartilage for Joint Regeneration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301833. [PMID: 37395375 PMCID: PMC10502860 DOI: 10.1002/advs.202301833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/07/2023] [Indexed: 07/04/2023]
Abstract
Cartilage damage affects millions of people worldwide. Tissue engineering strategies hold the promise to provide off-the-shelf cartilage analogs for tissue transplantation in cartilage repair. However, current strategies hardly generate sufficient grafts, as tissues cannot maintain size growth and cartilaginous phenotypes simultaneously. Herein, a step-wise strategy is developed for fabricating expandable human macromass cartilage (macro-cartilage) in a 3D condition by employing human polydactyly chondrocytes and a screen-defined serum-free customized culture (CC). CC-induced chondrocytes demonstrate improved cell plasticity, expressing chondrogenic biomarkers after a 14.59-times expansion. Crucially, CC-chondrocytes form large-size cartilage tissues with average diameters of 3.25 ± 0.05 mm, exhibiting abundant homogenous matrix and intact structure without a necrotic core. Compared with typical culture, the cell yield in CC increases 2.57 times, and the expression of cartilage marker collagen type II increases 4.70 times. Transcriptomics reveal that this step-wise culture drives a proliferation-to-differentiation process through an intermediate plastic stage, and CC-chondrocytes undergo a chondral lineage-specific differentiation with an activated metabolism. Animal studies show that CC macro-cartilage maintains a hyaline-like cartilage phenotype in vivo and significantly promotes the healing of large cartilage defects. Overall, an efficient expansion of human macro-cartilage with superior regenerative plasticity is achieved, providing a promising strategy for joint regeneration.
Collapse
|
4
|
Sahoo A, Damala M, Jaffet J, Prasad D, Basu S, Singh V. Expansion and characterization of human limbus-derived stromal/mesenchymal stem cells in xeno-free medium for therapeutic applications. Stem Cell Res Ther 2023; 14:89. [PMID: 37061739 PMCID: PMC10105964 DOI: 10.1186/s13287-023-03299-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 03/24/2023] [Indexed: 04/17/2023] Open
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) have been proven to prevent and clear corneal scarring and limbal stem cell deficiency. However, using animal-derived serum in a culture medium raises the ethical and regulatory bar. This study aims to expand and characterize human limbus-derived stromal/mesenchymal stem cells (hLMSCs) for the first time in vitro in the xeno-free medium. METHODS Limbal tissue was obtained from therapeutic grade corneoscleral rims and subjected to explant culture till tertiary passage in media with and without serum (STEM MACS XF; SM), to obtain pure hLMSCs. Population doubling time, cell proliferation, expression of phenotypic markers, tri-lineage differentiation, colony-forming potential and gene expression analysis were carried out to assess the retention of phenotypic and genotypic characteristics of hLMSCs. RESULTS The serum-free medium supported the growth of hLMSCs, retaining similar morphology but a significantly lower doubling time of 23 h (*p < 0.01) compared to the control medium. FACS analysis demonstrated ≥ 90% hLMSCs were positive for CD90+, CD73+, CD105+, and ≤ 6% were positive for CD45-, CD34- and HLA-DR-. Immunofluorescence analysis confirmed similar expression of Pax6+, COL IV+, ABCG2+, ABCB5+, VIM+, CD90+, CD105+, CD73+, HLA-DR- and CD45-, αSMA- in both the media. Tri-lineage differentiation potential and gene expression of hLMSCs were retained similarly to that of the control medium. CONCLUSION The findings of this study demonstrate successful isolation, characterization and culture optimization of hLMSCs for the first time in vitro in a serum-free environment. This will help in the future pre-clinical and clinical applications of MSCs in translational research.
Collapse
Affiliation(s)
- Abhishek Sahoo
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad, Telangana, India
| | - Mukesh Damala
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad, Telangana, India
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Jilu Jaffet
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad, Telangana, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Deeksha Prasad
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad, Telangana, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Sayan Basu
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad, Telangana, India.
| | - Vivek Singh
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad, Telangana, India.
| |
Collapse
|
5
|
Naeem A, Gupta N, Arzoo N, Naeem U, Khan MJ, Choudhry MU, Cui W, Albanese C. A Survey and Critical Evaluation of Isolation, Culture, and Cryopreservation Methods of Human Amniotic Epithelial Cells. Cell Cycle 2022; 21:655-673. [PMID: 35289707 PMCID: PMC8973348 DOI: 10.1080/15384101.2021.2020015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Human amniotic epithelial cells (hAECs), derived from an epithelial cell layer of the human amniotic membrane, possess embryonic stem-like properties and are known to maintain multilineage differentiation potential. Unfortunately, an inability to expand hAECs without significantly compromising their stem cell potency has precluded their widespread use for regenerative therapies. This article critically evaluates the methods used for isolation, expansion, and cryopreservation of hAECs. We assessed the impact of these methods on ex-vivo expansion and stem cell phenotype of hAECs. Moreover, the progress and challenges to optimize clinically suitable culture conditions for an efficient ex-vivo expansion and storage of these cells are highlighted. Additionally, we also reviewed the currently used hAECs isolation and characterization methods employed in clinical trials. Despite the developments made in the last decade, significant challenges still exist to overcome limitations of ex-vivo expansion and retention of stemness of hAECs in both xenogeneic and xenofree culture conditions. Therefore, optimization and standardization of culture conditions for robust ex-vivo maintenance of hAECs without affecting tissue regenerative properties is an absolute requirement for their successful therapeutic manipulation. This review may help the researchers to optimize the methods that support ex-vivo survival, proliferation, and self-renewal properties of the hAECs.Abbreviations: AM: Human amniotic membrane; CM-HBSS: Ca++ and Mg++ free HBSS; DMEM: Dulbecco's Modified Eagle Medium; DMEM-HG: DMEM-high glucose; EMEM: Eagle's Modified Essential Medium; EMT: Epithelial-to-mesenchymal transition; EpM: Epi-life complete media; ESC: Embryonic stem cells; ESCM: Epithelial cell surface markers; hAECs: Human amniotic epithelial cells; HLA: Human leukocyte antigen; IM: Immunogenicity markers; iPSC: Induced pluripotent stem cells; KOSR; KSR: Knockout serum replacement; KSI: Key success indicators; CHM: Cell heterogeneity markers; Nanog: NANOG homeobox; Oct-4: Octamer binding transcription factor 4; OR: Operation room; P: Passage; PM: Pluripotency markers; SCM: Stem cell markers for non-differentiated cells; Sox-2: Sry-related HMG box gene 2; SSEA-4: Stage-specific embryonic antigen; TRA: Tumor rejection antigen; UC: Ultra-culture; XF: Xenogeneic free.
Collapse
Affiliation(s)
- Aisha Naeem
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA.,Health Research Governance Department, Ministry of Public Health, Qatar
| | - Nikita Gupta
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Natasha Arzoo
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Usra Naeem
- Department of Health Professional Technology, University of Lahore, Pakistan
| | | | - Muhammad Umer Choudhry
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Wanxing Cui
- Cell Therapy Manufacturing Facility, MedStar Georgetown University Hospital, Washington, District of Columbia, USA.,Department of Radiology, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Chris Albanese
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA.,Department of Radiology, Georgetown University Medical Center, Washington, District of Columbia, USA.,Department of Oncology, Center for Translational Imaging, Georgetown University Medical Center, Washington, District of Columbia, USA
| |
Collapse
|
6
|
Posung M, Promkhatkaew D, Borg J, Tongta A. Development of a modified serum-free medium for Vero cell cultures: effects of protein hydrolysates, l-glutamine and SITE liquid media supplement on cell growth. Cytotechnology 2021; 73:683-695. [PMID: 34629745 DOI: 10.1007/s10616-020-00450-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 11/02/2016] [Indexed: 11/26/2022] Open
Abstract
Vero cells have been widely used in the viral vaccine production due to the recommendation of the World Health Organization regarding its safety and non-tumorigenicity. The aim of this study was to describe the development a modified serum-free medium for Vero cell cultures. Two protein hydrolysates (Bacto™ soytone and Bacto™ yeast extract), vitamin C, vitamin B12, SITE liquid media supplement, and recombinant human epidermal growth factor (rEGF) were investigated as serum substitutes. A sequential experiment of fractional factorial and central composite design was applied. A modified serum-free medium obtained (named as SFM01-M) was verified. Contrary to P0, the cell yields obtained at P1, P2, and P3 decreased continuously during the verification experiments indicating that Vero cells could not adapt to SFM01-M as expected according to the empirical mathematical model. To improve cell growth after P0, protein hydrolysates, l-glutamine, and SITE liquid media supplement were further investigated. The results showed that cell yields gradually decreased from P1 to P3 when a fixed concentration of Bacto™ yeast extract (7.0 g/L) combined with various concentrations of Bacto™ soytone (0.1-7.0 g/L) in SFM01-M were used. Similarly, cell yields also gradually decreased from P1 to P3 when a fixed concentration of Bacto™ soytone (7.0 g/L) combined with various concentrations of Bacto™ yeast extract (0.1-7.0 g/L) in SFM01-M were used. However, the combination of Bacto™ soytone at 0.1 g/L and Bacto™ yeast extract at 7.0 g/L or Bacto™ soytone at 7.0 g/L and Bacto™ yeast extract at 0.1 g/L in SFM01-M could give the maximum cell yield at P3 when compared with other combinations. In addition, the addition of SITE liquid media supplement (0.1-2.0% v/v) in SFM01-M in which the concentrations of Bacto™ soytone, Bacto™ yeast extract, and l-glutamine were fixed at 0.1 g/L, 0.1 g/L, and 4.0 mM, respectively, the results showed that the cell yields obtained at P3 were not significantly different. From this study, the optimum concentrations of SFM01-M components were as follows: Bacto™ soytone (0.1 g/L), Bacto™ yeast extract (0.1 g/L), vitamin C (9.719 mg/L), vitamin B12 (0.1725 mg/L), SITE liquid media supplement (0.1-2.0% v/v), rEGF (0.05756 mg/L), l-glutamine (4.0 mM), MEM non-essential amino acids (1.0% v/v), sodium pyruvate (1.0 mM), MEM (9.4 g/L), and sodium hydrogen carbonate (2.2 g/L). However, to evaluate SFM01-M in the long-term subculture of Vero cells, the efficiency of SFM01-M will be further investigated.
Collapse
Affiliation(s)
- Manoch Posung
- Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150 Thailand
- Medical Biotechnology Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000 Thailand
| | - Duanthanorm Promkhatkaew
- Office of Knowledge and Medical Science Technology Management, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000 Thailand
| | - Jörgen Borg
- Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150 Thailand
| | - Anan Tongta
- Division of Biotechnology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150 Thailand
| |
Collapse
|
7
|
Expansion and characterization of bone marrow derived human mesenchymal stromal cells in serum-free conditions. Sci Rep 2021; 11:3403. [PMID: 33564114 PMCID: PMC7873235 DOI: 10.1038/s41598-021-83088-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 01/26/2021] [Indexed: 12/12/2022] Open
Abstract
Bone marrow-derived mesenchymal stromal cells (BM-MSCs) are gaining increasing importance in the field of regenerative medicine. Although therapeutic value of MSCs is now being established through many clinical trials, issues have been raised regarding their expansion as per regulatory guidelines. Fetal bovine serum usage in cell therapy poses difficulties due to its less-defined, highly variable composition and safety issues. Hence, there is a need for transition from serum-based to serum-free media (SFM). Since SFM are cell type-specific, a precise analysis of the properties of MSCs cultured in SFM is required to determine the most suitable one. Six different commercially available low serum/SFM with two different seeding densities were evaluated to explore their ability to support the growth and expansion of BM-MSCs and assess the characteristics of BM-MSCs cultured in these media. Except for one of the SFM, all other media tested supported the growth of BM-MSCs at a low seeding density. No significant differences were observed in the expression of MSC specific markers among the various media tested. In contrary, the population doubling time, cell yield, potency, colony-forming ability, differentiation potential, and immunosuppressive properties of MSCs varied with one another. We show that SFM tested supports the growth and expansion of BM-MSCs even at low seeding density and may serve as possible replacement for animal-derived serum.
Collapse
|
8
|
Al Hosni R, Shah M, Cheema U, Roberts HC, Luyten FP, Roberts SJ. Mapping human serum-induced gene networks as a basis for the creation of biomimetic periosteum for bone repair. Cytotherapy 2020; 22:424-435. [PMID: 32522398 DOI: 10.1016/j.jcyt.2020.03.434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/21/2020] [Accepted: 03/23/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND The periosteum is a highly vascularized, collagen-rich tissue that plays a crucial role in directing bone repair. This is orchestrated primarily by its resident progenitor cell population. Indeed, preservation of periosteum integrity is critical for bone healing. Cells extracted from the periosteum retain their osteochondrogenic properties and as such are a promising basis for tissue engineering strategies for the repair of bone defects. However, the culture expansion conditions and the way in which the cells are reintroduced to the defect site are critical aspects of successful translation. Indeed, expansion in human serum and implantation on biomimetic materials has previously been shown to improve in vivo bone formation. AIM This study aimed to develop a protocol to allow for the expansion of human periosteum derived cells (hPDCs) in a biomimetic periosteal-like environment. METHODS The expansion conditions were defined through the investigation of the bioactive cues involved in augmenting hPDC proliferative and multipotency characteristics, based on transcriptomic analysis of cells cultured in human serum. RESULTS Master regulators of transcriptional networks were identified, and an optimized periosteum-derived growth factor cocktail (PD-GFC; containing β-estradiol, FGF2, TNFα, TGFβ, IGF-1 and PDGF-BB) was generated. Expansion of hPDCs in PD-GFC resulted in serum mimicry with regard to the cell morphology, proliferative capacity and chondrogenic differentiation. When incorporated into a three-dimensional collagen type 1 matrix and cultured in PD-GFC, the hPDCs migrated to the surface that represented the matrix topography of the periosteum cambium layer. Furthermore, gene expression analysis revealed a down-regulated WNT and TGFβ signature and an up-regulation of CREB, which may indicate the hPDCs are recreating their progenitor cell signature. CONCLUSION This study highlights the first stage in the development of a biomimetic periosteum, which may have applications in bone repair.
Collapse
Affiliation(s)
- Rawiya Al Hosni
- Department of Materials and Tissue, Institute of Orthopaedics and Musculoskeletal Science, University College London, Stanmore, UK
| | - Mittal Shah
- Department of Materials and Tissue, Institute of Orthopaedics and Musculoskeletal Science, University College London, Stanmore, UK
| | - Umber Cheema
- Department of Materials and Tissue, Institute of Orthopaedics and Musculoskeletal Science, University College London, Stanmore, UK
| | - Helen C Roberts
- Department of Natural Sciences, Faculty of Science & Technology, Middlesex University, London, UK
| | - Frank P Luyten
- Skeletal Biology and Tissue Engineering Centre, Department of Development and Regeneration, KU Leuven, Leuven, Belgium and
| | - Scott J Roberts
- Department of Materials and Tissue, Institute of Orthopaedics and Musculoskeletal Science, University College London, Stanmore, UK; Skeletal Biology and Tissue Engineering Centre, Department of Development and Regeneration, KU Leuven, Leuven, Belgium and; Department of Comparative Biomedical Sciences, The Royal Veterinary College, London, UK.
| |
Collapse
|
9
|
Zhang G, Zhao X, Li X, Du G, Zhou J, Chen J. Challenges and possibilities for bio-manufacturing cultured meat. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.01.026] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
10
|
Serum-free media for the growth of primary bovine myoblasts. Cytotechnology 2019; 72:111-120. [PMID: 31884572 PMCID: PMC7002633 DOI: 10.1007/s10616-019-00361-y] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 11/30/2019] [Indexed: 12/11/2022] Open
Abstract
The demand for meat is expected to exceed production capacity by livestock in the coming decennia. Therefore, cultured beef might be a viable alternative to traditional livestock-derived beef. One of the problems however is the sustainability of cultured beef through the use of fetal bovine serum. We aimed to identify a serum-free medium or a serum-replacement that is as effective as the current method used for culturing bovine myoblasts. Cells were harvested from a female Blanc Bleu Belge cow and myoblasts were subsequently isolated. Cells were cultured in either Advanced DMEM containing 20% FBS and 10% HS or one of the chemically-defined, serum-free media for 6 days. MTS was used as a measure of cell proliferation at day 1, 4 or 6 and microscopic pictures were taken to assess cell morphology. FBM™, TesR™ and Essential 8™ are commercially available xeno-free media developed for human PSCs and fibroblasts, with the highest potential to sustain bovine myoblast proliferation. Of the supplements tested, XenoFree™ and a custom-prepared growth factor mix failed to stimulate cell proliferation. LipoGro™ stimulated cell proliferation in some cases but also changed the phenotype of myoblasts to an adipocyte-like phenotype. We conclude that serum-free media stimulate exponential cell expansion, albeit not to the extent of the current growth medium containing up to 30% serum. Further research is needed to investigate whether prolonged cell culture or an adaptation period could further increase cell proliferation.
Collapse
|
11
|
Finlayson KA, Leusch FDL, Limpus CJ, van de Merwe JP. Towards the development of standardised sea turtle primary cell cultures for toxicity testing. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 173:63-70. [PMID: 30769204 DOI: 10.1016/j.ecoenv.2019.01.117] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 06/09/2023]
Abstract
Chemical contaminants are known to accumulate in marine megafauna globally, but little is known about how this impacts animal health. In vitro assays offer an ethical, reproducible and cost-effective alternative to live animal toxicity testing on large, long-lived or threatened species, such as sea turtles. However, using a cell culture from a single animal raise the question of whether the toxicity observed adequately represents the toxicity in that species. This study examined variation in the cytotoxic response of primary skin fibroblasts established from seven green (Chelonia mydas) and five loggerhead (Caretta caretta) sea turtles. Cell viability using resazurin dye was examined in response to exposure to five contaminants. The variation in cytotoxicity was generally low (within a factor of five) for both independent analyses of the same cell culture, and cell cultures from different individuals. This low within and between cell culture variation indicates that primary sea turtle cell cultures can provide a suitable approach to understanding toxicity in sea turtles. In addition, green and loggerhead turtle cells showed similar toxicity to the compounds tested, indicating that only subtle differences in chemical sensitivity may exist between sea turtle species. This study provides a framework for using species-specific cell cultures in future toxicological studies on sea turtles. Although in vivo studies are the gold standard for toxicological studies and species-specific risk assessments, the development of in vitro tools can provide important information when in vivo studies are not possible or practical. For large, endangered species such as sea turtles that are exposed to, and accumulate, a large number of contaminants, using validated cell cultures may facilitate the rapid assessment of chemical risk to these animals.
Collapse
Affiliation(s)
- Kimberly A Finlayson
- Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Australia.
| | - Frederic D L Leusch
- Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Australia
| | - Colin J Limpus
- Department of Environment and Science, Queensland, Australia
| | - Jason P van de Merwe
- Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Australia
| |
Collapse
|
12
|
Functional Assessment for Clinical Use of Serum-Free Adapted NK-92 Cells. Cancers (Basel) 2019; 11:cancers11010069. [PMID: 30634595 PMCID: PMC6356567 DOI: 10.3390/cancers11010069] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/28/2018] [Accepted: 01/03/2019] [Indexed: 12/20/2022] Open
Abstract
Natural killer (NK) cells stand out as promising candidates for cellular immunotherapy due to their capacity to kill malignant cells. However, the therapeutic use of NK cells is often dependent on cell expansion and activation with considerable amounts of serum and exogenous cytokines. We aimed to develop an expansion protocol for NK-92 cells in an effort to generate a cost-efficient, xeno-free, clinical grade manufactured master cell line for therapeutic applications. By making functional assays with NK-92 cells cultured under serum-free conditions (NK-92SF) and comparing to serum-supplemented NK-92 cells (NK-92S) we did not observe significant alterations in the viability, proliferation, receptor expression levels, or in perforin and granzyme levels. Interestingly, even though NK-92SF cells displayed decreased degranulation and cytotoxicity against tumor cells in vitro, the degranulation capacity was recovered after overnight incubation with 20% serum in the medium. Moreover, lentiviral vector-based genetic modification efficiency of NK-92SF cells was comparable with NK-92S cells. The application of similar strategies can be useful in reducing the costs of manufacturing cells for clinical use and can help us understand and implement strategies towards chemically defined expansion and genetic modification protocols.
Collapse
|
13
|
The renaissance of human skin organ culture: A critical reappraisal. Differentiation 2018; 104:22-35. [DOI: 10.1016/j.diff.2018.10.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/03/2018] [Accepted: 10/15/2018] [Indexed: 02/07/2023]
|
14
|
Saini A, Rullman E, Lilja M, Mandić M, Melin M, Olsson K, Gustafsson T. Asymmetric cellular responses in primary human myoblasts using sera of different origin and specification. PLoS One 2018; 13:e0192384. [PMID: 29401478 PMCID: PMC5798781 DOI: 10.1371/journal.pone.0192384] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 01/20/2018] [Indexed: 11/19/2022] Open
Abstract
For successful growth and maintenance of primary myogenic cells in vitro, culture medium and addition of sera are the most important factors. At present it is not established as to what extent sera of different origin and composition, supplemented in media or serum-free media conditions influence myoblast function and responses to different stimuli. By assessing markers of proliferation, differentiation/fusion, quiescence, apoptosis and protein synthesis the aim of the current study was to elucidate how primary human myoblasts and myotubes are modulated by different commonly used serum using FCS (foetal calf serum), (CS-FCS charcoal-stripped FCS, a manufacturing process to remove hormones and growth factors from sera), HS (horse serum) as well as in serum free conditions (DMEM). To characterise the biological impact of the different serum, myoblasts were stimulated with Insulin (100 nM) and Vitamin D (100 nM; 1α,25(OH)2D3, 1α,25-Dihydroxycholecalciferol, Calcitriol), two factors with characterised effects on promoting fusion and protein synthesis or quiescence, respectively in human myoblasts/myotubes. We demonstrate that sera of different origin/formulation differentially affect myoblast proliferation and myotube protein synthesis. Importantly, we showed that quantifying the extent to which Insulin effects myoblasts in vitro is highly dependent upon serum addition and which type is present in the media. Upregulation of mRNA markers for myogenic fusion, Myogenin, with Insulin stimulation, relative to DMEM, appeared dampened at varying degrees with serum addition and effects on p70S6K phosphorylation as a marker of protein synthesis could not be identified unless serum was removed from media. We propose that these asymmetric molecular and biochemical responses in human myoblasts reflect the variable composition of mitogenic and anabolic factors in each of the sera. The results have implications for both the reproducibility and interpretation of results from experimental models in myoblast cells/myotubes.
Collapse
Affiliation(s)
- Amarjit Saini
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Eric Rullman
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
- Cardiovascular Theme, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Mats Lilja
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Mirko Mandić
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Michael Melin
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
- Cardiovascular Theme, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Karl Olsson
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Thomas Gustafsson
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| |
Collapse
|
15
|
Peh GSL, Ang HP, Lwin CN, Adnan K, George BL, Seah XY, Lin SJ, Bhogal M, Liu YC, Tan DT, Mehta JS. Regulatory Compliant Tissue-Engineered Human Corneal Endothelial Grafts Restore Corneal Function of Rabbits with Bullous Keratopathy. Sci Rep 2017; 7:14149. [PMID: 29074873 PMCID: PMC5658403 DOI: 10.1038/s41598-017-14723-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 10/16/2017] [Indexed: 01/19/2023] Open
Abstract
Corneal transplantation is the only treatment available to restore vision for individuals with blindness due to corneal endothelial dysfunction. However, severe shortage of available donor corneas remains a global challenge. Functional regulatory compliant tissue-engineered corneal endothelial graft substitute can alleviate this reliance on cadaveric corneal graft material. Here, isolated primary human corneal endothelial cells (CEnCs) propagated using a dual media approach refined towards regulatory compliance showed expression of markers indicative of the human corneal endothelium, and can be tissue-engineered onto thin corneal stromal carriers. Both cellular function and clinical adaptability was demonstrated in a pre-clinical rabbit model of bullous keratopathy using a tissue-engineered endothelial keratoplasty (TE-EK) approach, adapted from routine endothelial keratoplasty procedure for corneal transplantation in human patients. Cornea thickness of rabbits receiving TE-EK graft gradually reduced over the first two weeks, and completely recovered to a thickness of approximately 400 µm by the third week of transplantation, whereas corneas of control rabbits remained significantly thicker over 1,000 µm (p < 0.05) throughout the course of the study. This study showed convincing evidence of the adaptability of the propagated CEnCs and their functionality via a TE-EK approach, which holds great promises in translating the use of cultured CEnCs into the clinic.
Collapse
Affiliation(s)
- Gary S L Peh
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore. .,Duke-NUS Graduate Medical School, Singapore, Singapore.
| | - Heng-Pei Ang
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Chan N Lwin
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Khadijah Adnan
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Benjamin L George
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore.,Duke-NUS Graduate Medical School, Singapore, Singapore
| | - Xin-Yi Seah
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Shu-Jun Lin
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Maninder Bhogal
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore.,Department of Corneal and External Disease, Moorfields Eye Hospital, London, UK
| | - Yu-Chi Liu
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore.,Singapore National Eye Centre, Singapore, Singapore
| | - Donald T Tan
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore.,Singapore National Eye Centre, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jodhbir S Mehta
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore, Singapore. .,Duke-NUS Graduate Medical School, Singapore, Singapore. .,Singapore National Eye Centre, Singapore, Singapore. .,School of Material Science and Engineering, Nanyang Technological University, Singapore, Singapore.
| |
Collapse
|
16
|
Xeno-Free Strategies for Safe Human Mesenchymal Stem/Stromal Cell Expansion: Supplements and Coatings. Stem Cells Int 2017; 2017:6597815. [PMID: 29158740 PMCID: PMC5660800 DOI: 10.1155/2017/6597815] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 08/01/2017] [Indexed: 12/13/2022] Open
Abstract
Human mesenchymal stem/stromal cells (hMSCs) have generated great interest in regenerative medicine mainly due to their multidifferentiation potential and immunomodulatory role. Although hMSC can be obtained from different tissues, the number of available cells is always low for clinical applications, thus requiring in vitro expansion. Most of the current protocols for hMSC expansion make use of fetal bovine serum (FBS) as a nutrient-rich supplement. However, regulatory guidelines encourage novel xeno-free alternatives to define safer and standardized protocols for hMSC expansion that preserve their intrinsic therapeutic potential. Since hMSCs are adherent cells, the attachment surface and cell-adhesive components also play a crucial role on their successful expansion. This review focuses on the advantages/disadvantages of FBS-free media and surfaces/coatings that avoid the use of animal serum, overcoming ethical issues and improving the expansion of hMSC for clinical applications in a safe and reproducible way.
Collapse
|
17
|
Best practices for media selection for mammalian cells. In Vitro Cell Dev Biol Anim 2017; 53:673-681. [DOI: 10.1007/s11626-017-0186-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 06/28/2017] [Indexed: 11/25/2022]
|
18
|
Liu CL, Watson AM, Place AR, Jagus R. Taurine Biosynthesis in a Fish Liver Cell Line (ZFL) Adapted to a Serum-Free Medium. Mar Drugs 2017; 15:md15060147. [PMID: 28587087 PMCID: PMC5484097 DOI: 10.3390/md15060147] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 05/18/2017] [Accepted: 05/22/2017] [Indexed: 12/22/2022] Open
Abstract
Although taurine has been shown to play multiple important physiological roles in teleosts, little is known about the molecular mechanisms underlying dietary requirements. Cell lines can provide useful tools for deciphering biosynthetic pathways and their regulation. However, culture media and sera contain variable taurine levels. To provide a useful cell line for the investigation of taurine homeostasis, an adult zebrafish liver cell line (ZFL) has been adapted to a taurine-free medium by gradual accommodation to a commercially available synthetic medium, UltraMEM™-ITES. Here we show that ZFL cells are able to synthesize taurine and be maintained in medium without taurine. This has allowed for the investigation of the effects of taurine supplementation on cell growth, cellular amino acid pools, as well as the expression of the taurine biosynthetic pathway and taurine transporter genes in a defined fish cell type. After taurine supplementation, cellular taurine levels increase but hypotaurine levels stay constant, suggesting little suppression of taurine biosynthesis. Cellular methionine levels do not change after taurine addition, consistent with maintenance of taurine biosynthesis. The addition of taurine to cells grown in taurine-free medium has little effect on transcript levels of the biosynthetic pathway genes for cysteine dioxygenase (CDO), cysteine sulfinate decarboxylase (CSAD), or cysteamine dioxygenase (ADO). In contrast, supplementation with taurine causes a 30% reduction in transcript levels of the taurine transporter, TauT. This experimental approach can be tailored for the development of cell lines from aquaculture species for the elucidation of their taurine biosynthetic capacity.
Collapse
Affiliation(s)
- Chieh-Lun Liu
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, 701 E. Pratt Street, Baltimore, MD 21202, USA.
| | - Aaron M Watson
- Marine Resources Research Institute, South Carolina Department of Natural Resources, 217 Fort Johnson Rd, Charleston, SC 29412, USA.
| | - Allen R Place
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, 701 E. Pratt Street, Baltimore, MD 21202, USA.
| | - Rosemary Jagus
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, 701 E. Pratt Street, Baltimore, MD 21202, USA.
| |
Collapse
|
19
|
Horváthy DB, Simon M, Schwarz CM, Masteling M, Vácz G, Hornyák I, Lacza Z. Serum albumin as a local therapeutic agent in cell therapy and tissue engineering. Biofactors 2017; 43:315-330. [PMID: 27859738 DOI: 10.1002/biof.1337] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/05/2016] [Accepted: 10/03/2016] [Indexed: 12/15/2022]
Abstract
Albumin is a major plasma protein that has become ubiquitous in regenerative medicine research. As such, many studies have examined its structure and advantageous properties. However, a systematic and comprehensive understanding of albumin's role, capabilities and therapeutic potential still eludes the field. In the present work, we review how albumin is applied in tissue engineering, including cell culture and storage, in vitro fertilization and transplantation. Furthermore, we discuss how albumin's physiological role extends beyond a carrier for metal ions, fatty acids, pharmacons and growth factors. Albumin acts as a bacteriostatic coating that simultaneously promotes attachment and proliferation of eukaryotic cells. These properties with the combination of free radical scavenging, neutrophil activation and as a buffer molecule already make the albumin protein beneficial in healing processes supporting functional tissue remodeling. Nevertheless, recent data revealed that albumin can be synthesized by osteoblasts and its local concentration is raised after bone trauma. Interestingly, by increasing the local albumin concentration in vivo, faster bone healing is achieved, possibly because albumin recruits endogenous stem cells and promotes the growth of new bone. These data also suggest an active role of albumin, even though a specific receptor has not yet been identified. Together, this discussion sheds light on why the extravascular use of the albumin molecule is in the scope of scientific investigations and why it should be considered as a local therapeutic agent in regenerative medicine. © 2016 BioFactors, 43(3):315-330, 2017.
Collapse
Affiliation(s)
- Dénes B Horváthy
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Melinda Simon
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Charlotte M Schwarz
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Mariana Masteling
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Gabriella Vácz
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - István Hornyák
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Zsombor Lacza
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| |
Collapse
|
20
|
Rojas-Martínez C, Rodríguez-Vivas R, Figueroa Millán J, Acosta Viana K, Gutiérrez Ruiz E, Álvarez Martínez J. Putrescine: Essential factor for in vitro proliferation of Babesia bovis. Exp Parasitol 2017; 175:79-84. [DOI: 10.1016/j.exppara.2017.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 12/19/2016] [Accepted: 01/27/2017] [Indexed: 01/12/2023]
|
21
|
McAleer CW, Rumsey JW, Stancescu M, Hickman JJ. Functional myotube formation from adult rat satellite cells in a defined serum-free system. Biotechnol Prog 2015; 31:997-1003. [PMID: 25683642 PMCID: PMC5015122 DOI: 10.1002/btpr.2063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 01/28/2015] [Indexed: 12/28/2022]
Abstract
This manuscript describes the development of a culture system whereby mature contracting myotubes were formed from adult rat derived satellite cells. Satellite cells, extracted from the Tibialis Anterior of adult rats, were grown in defined serum-free growth and differentiation media, on a nonbiological substrate, N-1[3-trimethoxysilyl propyl] diethylenetriamine. Myotubes were evaluated morphologically and immunocytochemically, using MyHC specific antibodies, as well as functionally using patch clamp electrophysiology to measure ion channel activity. Results indicated the establishment of the rapid expression of adult myosin isoforms that contrasts to their slow development in embryonic cultures. This culture system has applications in the understanding and treatment of age-related muscle myopathy, muscular dystrophy, and for skeletal muscle engineering by providing a more relevant phenotype for both in vitro and in vivo applications.
Collapse
Affiliation(s)
- Christopher W McAleer
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826
| | - John W Rumsey
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826
| | - Maria Stancescu
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826
| | - James J Hickman
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826
| |
Collapse
|
22
|
Abstract
Alternative sources of animal proteins are needed that can be produced efficiently, thereby providing food security with diminished ecological burden. It is feasible to culture beef from bovine skeletal muscle stem cells, but the technology is still under development. The aim is to create a beef mimic with equivalent taste, texture, and appearance and with the same nutritional value as livestock-produced beef. More specifically, there is a need for optimization of protein content and fat content. In addition, scalability of production requires modification of current small-scale bioreactors to the largest possible scale. The necessary steps and current progress suggest that this aim is achievable, but formal evidence is still required. Similarly, we can be optimistic about consumer acceptance based on initial data, but detailed studies are needed to gain more insight into potential psychological obstacles that could lead to rejection. These challenges are formidable but likely surmountable. The severity of upcoming food-security threats warrants serious research and development efforts to address the challenges that come with bringing cultured beef to the market.
Collapse
Affiliation(s)
- Mark J Post
- Department of Physiology, Maastricht University, Maastricht, the Netherlands
| |
Collapse
|
23
|
Desseaux S, Klok HA. Temperature-Controlled Masking/Unmasking of Cell-Adhesive Cues with Poly(ethylene glycol) Methacrylate Based Brushes. Biomacromolecules 2014; 15:3859-65. [DOI: 10.1021/bm501233h] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Solenne Desseaux
- Institut des Matériaux
et Institut des Sciences et Ingénierie Chimiques, Laboratoire
des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut des Matériaux
et Institut des Sciences et Ingénierie Chimiques, Laboratoire
des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| |
Collapse
|
24
|
Hemeda H, Giebel B, Wagner W. Evaluation of human platelet lysate versus fetal bovine serum for culture of mesenchymal stromal cells. Cytotherapy 2014; 16:170-80. [PMID: 24438898 DOI: 10.1016/j.jcyt.2013.11.004] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 11/05/2013] [Accepted: 11/07/2013] [Indexed: 12/11/2022]
Abstract
Culture media for therapeutic cell preparations-such as mesenchymal stromal cells (MSCs)-usually comprise serum additives. Traditionally, fetal bovine serum is supplemented in basic research and in most clinical trials. Within the past years, many laboratories adapted their culture conditions to human platelet lysate (hPL), which further stimulates proliferation and expansion of MSCs. Particularly with regard to clinical application, human alternatives for fetal bovine serum are clearly to be preferred. hPL is generated from human platelet units by disruption of the platelet membrane, which is commonly performed by repeated freeze and thaw cycles. Such culture supplements are notoriously ill-defined, and many parameters contribute to batch-to-batch variation in hPL such as different amounts of plasma, a broad range of growth factors and donor-specific effects. The plasma components of hPL necessitate addition of anticoagulants such as heparins to prevent gelatinization of hPL medium, and their concentration must be standardized. Labels for description of hPL-such as "xenogen-free," "animal-free" and "serum free"-are not used consistently in the literature and may be misleading if not critically assessed. Further analysis of the precise composition of relevant growth factors, attachment factors, microRNAs and exosomes will pave the way for optimized and defined culture conditions. The use of hPL has several advantages and disadvantages: they must be taken into account because the choice of cell culture additive has major impact on cell preparations.
Collapse
Affiliation(s)
- Hatim Hemeda
- Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University Medical School, Aachen, Germany
| | - Bernd Giebel
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - Wolfgang Wagner
- Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University Medical School, Aachen, Germany.
| |
Collapse
|
25
|
Mainzer C, Barrichello C, Debret R, Remoué N, Sigaudo-Roussel D, Sommer P. Insulin-transferrin-selenium as an alternative to foetal serum for epidermal equivalents. Int J Cosmet Sci 2014; 36:427-35. [PMID: 24847782 DOI: 10.1111/ics.12141] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/26/2014] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Organotypic skin models are powerful tools for research in development, ageing and diseases. They have become more and more complex with the use of multiple cell types. This requires a culture medium adapted to optimize the development of such in vitro skin. Foetal bovine serum (FBS) is the most complete supplement in existence at the moment, providing at once growth factors, vitamins, hormones and other circulating compounds. However, this cocktail suffers from batch variability and its animal origin is ethically questionable. More importantly, its biological activities may interfere with the study of certain signalling pathways. Here, we present a strategy for constructing an epidermal equivalent using a defined culture medium without serum. METHODS An epidermal equivalent was constructed with primary human keratinocytes cultured using an insulin-transferrin-selenium (ITS) medium. Determination of steady-state gene expression levels and the immunohistological characterization of keratinocyte markers were performed to compare the ITS medium condition with a reference model, where keratinocytes were co-cultured with fibroblasts in the presence of FBS. RESULTS The data show that the ITS medium promoted the expression of keratinocyte proliferation and differentiation markers at the protein and transcript levels in a similar way to that of the reference model. CONCLUSION We show that culture using the ITS medium appears as a viable replacement for FBS in the construction of epidermal equivalents, opening the way to signal transduction studies.
Collapse
Affiliation(s)
- C Mainzer
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, CNRS, UMR5305, Université Lyon 1, 7 passage du Vercors, 69367, Lyon, France
| | | | | | | | | | | |
Collapse
|
26
|
Cigan AD, Nims RJ, Albro MB, Esau JD, Dreyer MP, Vunjak-Novakovic G, Hung CT, Ateshian GA. Insulin, ascorbate, and glucose have a much greater influence than transferrin and selenous acid on the in vitro growth of engineered cartilage in chondrogenic media. Tissue Eng Part A 2013; 19:1941-8. [PMID: 23544890 DOI: 10.1089/ten.tea.2012.0596] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The primary goal of this study was to characterize the response of chondrocyte-seeded agarose constructs to varying concentrations of several key nutrients in a chondrogenic medium, within the overall context of optimizing the key nutrients and the placement of nutrient channels for successful growth of cartilage tissue constructs large enough to be clinically relevant in the treatment of osteoarthritis (OA). To this end, chondrocyte-agarose constructs (ø4×2.34 mm, 30×10(6) cells/mL) were subjected to varying supplementation levels of insulin (0× to 30× relative to standard supplementation), transferrin (0× to 30×), selenous acid (0× to 10×), ascorbate (0× to 30×), and glucose (0× to 3×). The quality of resulting engineered tissue constructs was evaluated by their compressive modulus (E(-Y)), tensile modulus (E(+Y)), hydraulic permeability (k), and content of sulfated glycosaminoglycans (sGAG) and collagen (COL); DNA content was also quantified. Three control groups from two separate castings of constructs (1× concentrations of all medium constituents) were used. After 42 days of culture, values in each of these controls were, respectively, E(-Y)=518±78, 401±113, 236±67 kPa; E(+Y)=1420±430, 1140±490, 1240±280 kPa; k=2.3±0.8×10(-3), 5.4±7.0×10(-3), 3.3±1.3×10(-3) mm(4)/N·s; sGAG=7.8±0.3, 6.3±0.4, 4.1±0.5%/ww; COL=1.3±0.2, 1.1±0.3, 1.4±0.4%/ww; and DNA=11.5±2.2, 12.1±0.6, 5.2±2.8 μg/disk. The presence of insulin and ascorbate was essential, but their concentrations may drop as low as 0.3× without detrimental effects on any of the measured properties; excessive supplementation of ascorbate (up to 30×) was detrimental to E(-Y), and 30× insulin was detrimental to both E(+Y) and E(-Y). The presence of glucose was similarly essential, and matrix elaboration was significantly dependent on its concentration (p<10(-6)), with loss of functional properties, composition, and cellularity observed at ≤0.3×; excessive glucose supplementation (up to 3×) showed no detrimental effects. In contrast, transferrin and selenous acid had no influence on matrix elaboration. These findings suggest that adequate distributions of insulin, ascorbate, and glucose, but not necessarily of transferrin and selenous acid, must be ensured within large engineered cartilage constructs to produce a viable substitute for joint tissue lost due to OA.
Collapse
Affiliation(s)
- Alexander D Cigan
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, USA
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Lohr V, Genzel Y, Behrendt I, Scharfenberg K, Reichl U. A new MDCK suspension line cultivated in a fully defined medium in stirred-tank and wave bioreactor. Vaccine 2010; 28:6256-64. [PMID: 20638458 DOI: 10.1016/j.vaccine.2010.07.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 03/29/2010] [Accepted: 07/02/2010] [Indexed: 01/01/2023]
Abstract
An adherently growing MDCK cell line was adapted in a two-step process in a fully defined medium and in suspension. The resulting MDCK.SUS2 cells were subsequently evaluated for their potential as host cells for influenza vaccine production in two lab-scale bioreactors (wave and stirred-tank). Cell concentrations up to 2.3 x 10(6)cells/mL were obtained after 96 h, which is slightly higher than cell concentrations obtained with adherent MDCK cells cultivated on microcarriers (2g/L). Infections with influenza A/PR/8/34 and B/Malaysia resulted in high virus titers (2.90 and 2.75 log HA units/100 microL, respectively). The monitoring of extracellular metabolites, including amino acids, revealed a change in some of the metabolite consumption or release profiles, which indicates changes in metabolism during the adaptation process. Overall, the MDCK.SUS2 cell line represents a new cell substrate for a robust influenza vaccine production in a fully defined process.
Collapse
Affiliation(s)
- V Lohr
- Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Sandtorstr. 1, 39106 Magdeburg, Germany.
| | | | | | | | | |
Collapse
|
28
|
van der Valk J, Brunner D, De Smet K, Fex Svenningsen A, Honegger P, Knudsen LE, Lindl T, Noraberg J, Price A, Scarino ML, Gstraunthaler G. Optimization of chemically defined cell culture media--replacing fetal bovine serum in mammalian in vitro methods. Toxicol In Vitro 2010; 24:1053-63. [PMID: 20362047 DOI: 10.1016/j.tiv.2010.03.016] [Citation(s) in RCA: 363] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 03/23/2010] [Accepted: 03/25/2010] [Indexed: 12/13/2022]
Abstract
Quality assurance is becoming increasingly important. Good laboratory practice (GLP) and good manufacturing practice (GMP) are now established standards. The biomedical field aims at an increasing reliance on the use of in vitro methods. Cell and tissue culture methods are generally fast, cheap, reproducible and reduce the use of experimental animals. Good cell culture practice (GCCP) is an attempt to develop a common standard for in vitro methods. The implementation of the use of chemically defined media is part of the GCCP. This will decrease the dependence on animal serum, a supplement with an undefined and variable composition. Defined media supplements are commercially available for some cell types. However, information on the formulation by the companies is often limited and such supplements can therefore not be regarded as completely defined. The development of defined media is difficult and often takes place in isolation. A workshop was organised in 2009 in Copenhagen to discuss strategies to improve the development and use of serum-free defined media. In this report, the results from the meeting are discussed and the formulation of a basic serum-free medium is suggested. Furthermore, recommendations are provided to improve information exchange on newly developed serum-free media.
Collapse
Affiliation(s)
- J van der Valk
- Fac. Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Genzel Y, Olmer RM, Schäfer B, Reichl U. Wave microcarrier cultivation of MDCK cells for influenza virus production in serum containing and serum-free media. Vaccine 2006; 24:6074-87. [PMID: 16781022 DOI: 10.1016/j.vaccine.2006.05.023] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2006] [Revised: 05/09/2006] [Accepted: 05/16/2006] [Indexed: 02/06/2023]
Abstract
A process for equine influenza virus vaccine production using a microcarrier system (Cytodex 1) in a 2 L Wave bioreactor is described. Growth of Madin Darby canine kidney (MDCK) cells in serum containing GMEM medium (SC) is compared to growth in serum-free Ex-Cell MDCK medium (SF) without washing steps and medium exchange before infection. Cultivations with microcarrier concentrations of 2 and 4 g/L for both media are shown. Metabolic data from carbon and amino acid metabolism are discussed. Additionally, in roller bottle experiments the influence of multiplicity of infection (moi) and trypsin concentration on the HA value was investigated. Analysis of HA and TCID(50) at 37 degrees C showed a stable HA of maximum 2.6 log HA/100 microL for 2 weeks. Peak TCID(50) titers of 10(7.7) viruses/mL were achieved 20h post infection, but infectivity was below detection limit after 150 h. Cell attachment onto microcarriers under serum-free conditions was improved by Ca(2+) addition and by cell harvesting without trypsin using only an EDTA/PBS solution. For the wave cultivation maximum virus titers of 2.3-2.6 log HA units/100 microL were reached from infection with a moi of 0.05. However, in SF medium pH dropped to less than pH 6.8 which resulted in lower HA titers of 1.7 log HA units/100 microL. For the higher microcarrier concentration (4 g/L) medium exchange steps (500 mL) were needed for both media. Omission of the washing step and medium exchange before infection in SF medium clearly simplified the influenza production process; however, for higher virus yields a better pH control of the wave bioreactor would be required. Higher cell densities (2.8 x 10(6) cells/mL for 2 g/L microcarrier) and better attachment compared to stirred tank bioreactors showed, that the wave bioreactor is a good alternative to stirred tank processes for expanding production capacities in case of a pandemic.
Collapse
Affiliation(s)
- Y Genzel
- Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Sandtorstr. 1, 39106 Magdeburg, Germany.
| | | | | | | |
Collapse
|
30
|
Even MS, Sandusky CB, Barnard ND. Serum-free hybridoma culture: ethical, scientific and safety considerations. Trends Biotechnol 2006; 24:105-8. [PMID: 16427150 DOI: 10.1016/j.tibtech.2006.01.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2005] [Revised: 12/02/2005] [Accepted: 01/04/2006] [Indexed: 11/29/2022]
Abstract
Despite considerable progress in the development of cell culture techniques, including the development of the serum- and protein-free media that now routinely support hybridoma and mammalian cell growth, fetal bovine serum (FBS) supplemented media are still commonly used: a practice that raises ethical, scientific and safety concerns. The use of FBS in hybridoma culture media is examined here, with regards to the development and production of monoclonal antibodies (mAbs), and it is our recommendation that researchers adopt serum-free cell culture methods to reduce animal use in this area.
Collapse
Affiliation(s)
- Megha S Even
- Physicians Committee for Responsible Medicine, 5100 Wisconsin Ave NW, Suite 400, Washington, DC 20016, USA.
| | | | | |
Collapse
|
31
|
Coecke S, Balls M, Bowe G, Davis J, Gstraunthaler G, Hartung T, Hay R, Merten OW, Price A, Schechtman L, Stacey G, Stokes W. Guidance on good cell culture practice. a report of the second ECVAM task force on good cell culture practice. Altern Lab Anim 2005; 33:261-87. [PMID: 16180980 DOI: 10.1177/026119290503300313] [Citation(s) in RCA: 194] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Sandra Coecke
- ECVAM, Institute for Health and Consumer Protection, European Commission Joint Research Centre, Ispra (VA), Italy.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
van der Valk J, Mellor D, Brands R, Fischer R, Gruber F, Gstraunthaler G, Hellebrekers L, Hyllner J, Jonker FH, Prieto P, Thalen M, Baumans V. The humane collection of fetal bovine serum and possibilities for serum-free cell and tissue culture. Toxicol In Vitro 2004; 18:1-12. [PMID: 14630056 DOI: 10.1016/j.tiv.2003.08.009] [Citation(s) in RCA: 153] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fetal bovine serum (FBS) is a common supplement to in vitro culture media. A workshop was organized to discuss whether or not fetuses might suffer when blood is withdrawn, and to discuss serum replacement methods. When bovine fetuses are exposed after slaughter of the dam, they can suffer only if they inflate their lungs with air and increase their blood oxygen to levels compatible with awareness. Preventing fetuses from breathing air or killing them by an efficient method, according to clearly defined safeguards, ensures that fetal blood collection is humane. Since serum is a supplement of unknown composition, which could be contaminated with unwanted factors, there are scientific and safety reasons for omitting FBS from culture media. Several media have been developed in which minimal or no animal derived components are present. Also, different cell types have been adapted to serum-free media. As yet, no standard serum free media are present, and each cell type requires its own medium composition. Among other recommendations, the establishment of a public database with information on cell types and their serum-free medium composition is proposed.
Collapse
Affiliation(s)
- J van der Valk
- Netherlands Centre Alternatives to Animal Use Centre For Animals and Society, Fac. Veterinary Medicine, Utrecht University, Yalelaan 17, Utrecht, NL-3584 CL, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Knepper PA, Mayanil CS, Goossens W, McLone DC, Hayes E. The presence of transcription factors in fetal bovine sera. In Vitro Cell Dev Biol Anim 1998; 34:170-3. [PMID: 9542656 DOI: 10.1007/s11626-998-0101-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Three sources of fetal bovine serum (FBS) were fractionated by ammonium sulfate precipitation and by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), transferred to Immobilon-P membranes, immunoblotted with a panel of transcription factor antibodies, and detected by enhanced chemiluminescence. Nine transcription factors were detected--ATF-2, SRE-ZBP, GATA-2, TFIID, Ets-1/Ets-2, E2F-1, Oct-2, p53, and AP-2; four transcription factors were not detected--Myo D, CREB, Sp2, and Wilms' tumor. The results indicated the presence of varying amounts of several transcription factors in three commercial sources and may represent heretofore unrecognized factors influencing cell culture.
Collapse
Affiliation(s)
- P A Knepper
- Laboratory for Oculo-Cerebrospinal Investigation, Children's Memorial Medical Center, Chicago, Illinois 60614, USA
| | | | | | | | | |
Collapse
|
34
|
Abstract
Dissociated primary cell cultures were derived from the cochlear nuclei (CN) of postnatal rats using standard techniques. Cultured cells differentiated morphologically, but their dendritic profiles were generally less specialized than those of CN cells in vivo. Physiologically, cultured cells could be divided into three classes: tonic, phasic and non-spiking cells, which differed in many of their fundamental biophysical properties. The percentage of cultured cells that spiked repetitively increased over time to a maximum of 85% at 6 days. However, the percentage of cells that produced action potentials decreased with time in culture, from 91% during the first 8 days to less than 40% after 9 days. CN cells were successfully cultured in both serum-supplemented and serum-free (Neurobasal) media. More neurons survived at low plating densities in Neurobasal than in medium containing serum, although neuronal survival was similar at higher densities. Few neurons raised in the serum-free medium were spontaneously active; other response properties were similar to those of cells grown in the presence of serum. Although differentiation of CN cells in culture did not completely mirror the in vivo developmental pattern, these experiments demonstrate that primary culture represents a viable method for the in vitro study of CN neurons.
Collapse
Affiliation(s)
- J L Fitzakerley
- Center for Hearing Sciences and Department of Otolaryngology-Head and Neck Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | | | | | | |
Collapse
|
35
|
Gäbel G, Gálfi P, Neogrády S, Martens H. Characterization of Na+/H+ exchange in sheep rumen epithelial cells kept in primary culture. ZENTRALBLATT FUR VETERINARMEDIZIN. REIHE A 1996; 43:365-75. [PMID: 8818301 DOI: 10.1111/j.1439-0442.1996.tb00464.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The study aimed at testing whether Na+/H+ exchange activity is maintained during isolation and cultivation of rumen epithelial cells (REC) and whether Na+/H+ exchange is altered during proliferation and differentiation. REC were isolated from sheep rumen epithelium by fractional trypsinization and further cultivated for up to 21 days. Characteristics of Na+ uptake into cultured REC were the same as previously described for the Na+/H+ exchange in the intact rumen epithelium. Na+ uptake was increased by intracellular acidification and was inhibited by high doses of amiloride. Amiloride inhibited 3H-thymidine incorporation into REC at concentrations similar to those found for the inhibition of Na+ uptake. Fetal calf serum, a growth factor, stimulated amiloride-sensitive Na+ uptake. We therefore conclude that cultured rumen epithelial cells express Na+/H+ exchange and that the activity of the exchange is at least correlated to the intensity of proliferation.
Collapse
Affiliation(s)
- G Gäbel
- Department of Veterinary Physiology, Free Univ. of Berlin, Germany
| | | | | | | |
Collapse
|
36
|
Haugland HK, Tysnes OB. Heterogeneic modulation of malignant behavior in human glioma cells in defined and serum-containing media. In Vitro Cell Dev Biol Anim 1996; 32:159-66. [PMID: 8925138 DOI: 10.1007/bf02723681] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Malignant features in three glioma cell lines were studied in four defined media of various complexity. The cell lines D37MG, D54MG, and GaMG were able to grow in monolayer culture in all media examined, and as multicellular tumor spheroids in the two most nutrient-rich media. In the defined media, none of the cell lines were able to migrate in a migration assay on poly-D-lysine-coated plastic surfaces. Flow cytometric analysis of the GaMG cell line demonstrated no medium-dependent selection of subclones of glioma cells in spheroids cultured for 30 d. Morphological diversity of spheroids varied according to the supplementation of the media. The capacity of glioma cells to invade cellular rat brain aggregates was intact in the media examined. However, glioma migration was severely inhibited by the lack of specific serum components. This study demonstrates that glioma growth and invasion was heterogeneously preserved in the defined media used. Depending on the assay to be used in the study of glioma cell behavior, the degree of medium supplementation has to be considered.
Collapse
Affiliation(s)
- H K Haugland
- Department of Pathology, Gade Institute, University of Bergen, Norway
| | | |
Collapse
|
37
|
Li Y, Sattler GL, Pitot HC. The effect of amino acid composition of serum-free medium on DNA synthesis in primary hepatocyte cultures in the presence of epidermal growth factor. In Vitro Cell Dev Biol Anim 1995; 31:867-70. [PMID: 8826091 DOI: 10.1007/bf02634571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The presence of optimal nutritional elements in cell culture medium is very important in studies of cultured cells. For this reason, several researchers have experimented with adding or increasing the concentration of one or more amino acids to the medium they were using to determine "essential" amino acids and optimal concentrations. We studied how leaving out one amino acid at a time from Dulbecco's modified Eagle's medium would affect epidermal growth factor-induced DNA synthesis in primary hepatocytes of the rat. Our "modified" DMEM contained only eight amino acids: arginine, cysteine, isoleucine, leucine, lysine, phenylalanine, tryptophan, and valine. Proline was found to be an essential amino acid in normal DMEM but not in the modified DMEM, and some other amino acids reduced DNA synthesis in this medium. This study showed that perhaps no single amino acid such as proline can be called "essential," but rather an optimal balance of amino acids is required for each major function of each cell type cultured.
Collapse
Affiliation(s)
- Y Li
- Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison 53706, USA
| | | | | |
Collapse
|
38
|
Dufresne M, Jane D, Theriault A, Adeli K. Expression of cathepsin B and aryl hydrocarbon hydroxylase activities, and of apolipoprotein B in human hepatoma cells maintained long-term in a serum-free medium. In Vitro Cell Dev Biol Anim 1993; 29A:873-8. [PMID: 8167904 DOI: 10.1007/bf02631366] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We have established the human hepatoma cell line, HepG2, in a defined, serum-free medium. These cells were maintained and studied over a 100-generation period (i.e. 10 serial transfers). Cells maintained in serum-free medium exhibited growth parameters (i.e. saturation density, efficiency of plating, and population doubling time) similar to those obtained with HepG2 cells maintained in serum-supplemented medium. Serum-free cells were also similar to their serum-supplemented counterparts with respect to the expression of cathepsin B activity and the induction of aryl hydrocarbon hydroxylase by 2,3,7,8-tetrachlorodibenzo-p-dioxin. Significantly, HepG2 cells maintained in serum-free conditions also retained the ability to synthesize and secrete proteins, including the liver plasma protein, apo-lipoprotein B. These results indicate that the serum-free medium used in this study supports the long-term growth and maintenance of human hepatoma, HepG2, cells in culture. Inasmuch as these cells retain phenotypes, including differentiated markers previously reported for their serum-supplemented counterparts, they may provide a more reliable, standardized culture system to study the expression, secretion, and regulation of proteins during biological and pathologic processes.
Collapse
Affiliation(s)
- M Dufresne
- Department of Biological Sciences, University of Windsor, Ontario, Canada
| | | | | | | |
Collapse
|