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Gas chromatography-mass spectrometry analysis of human mesenchymal stem cell metabolism during proliferation and osteogenic differentiation under different oxygen tensions. J Biotechnol 2013; 169:95-102. [PMID: 24269895 DOI: 10.1016/j.jbiotec.2013.11.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 11/08/2013] [Accepted: 11/13/2013] [Indexed: 01/16/2023]
Abstract
Bone marrow derived human mesenchymal stem cells (hMSC) are the primary cell type in bone tissue engineering, and their life span during osteogenic differentiation is associated with changes in oxygen tension. As a ubiquitous regulator of cellular metabolic activity, oxygen tension influences the profiles of metabolites in the entire metabolic network and plays an important role in hMSC survival, function, and osteogenic differentiation. In the current study, we hypothesize that hMSC have a metabolic phenotype that supports growth in low oxygen environments and that this phenotype changes upon differentiation, leading to differential responses to oxygen tension. We developed a gas chromatography-mass spectrometry (GC-MS) based metabolic profiling approach to analyze the metabolic fate of (13)C-glucose in glycolysis and the tricarboxylic acid cycle (TCA) in undifferentiated hMSC and hMSC-derived osteoblasts (hMSC-OS) in response to perturbation in oxygen tension; specifically we compared changes induced by culture under 20% vs. 2% O2. The isotope enrichments in the metabolites were calculated and used to infer activities of specific metabolic enzymes and the associated pathways. The results revealed contrasting metabolic profiles for hMSC and the hMSC-OS in both 20% and 2% O2 states, with the most significant differences involving coupling of glycolysis to the TCA cycle, glutaminolysis, and the malate-aspartate shuttle. The results have important implications in defining the optimal culture conditions for hMSC expansion and osteogenic differentiation.
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Lei J, Hui D, Huang W, Liao Y, Yang L, Liu L, Zhang Q, Qi G, Song W, Zhang Y, Xiang AP, Zhou Q. Heterogeneity of the biological properties and gene expression profiles of murine bone marrow stromal cells. Int J Biochem Cell Biol 2013; 45:2431-43. [PMID: 23911306 DOI: 10.1016/j.biocel.2013.07.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/12/2013] [Accepted: 07/21/2013] [Indexed: 12/13/2022]
Abstract
Although mesenchymal stromal cells (MSCs) have demonstrated great therapeutic potential, the heterogeneity of MSCs may be responsible for the incongruent data obtained in MSC-based preclinical studies and clinical trials. Here, four mouse clonal MSC lines, termed MSC1, MSC2, MSC3, and MSC4, were isolated and extensively characterized. MSC4 cells grew most rapidly and formed colonies of the largest size, whereas MSC3 cells exhibited the slowest growth and formed only a few tiny clusters. MSC4 cells could differentiate into adipocytes, osteoblasts, and chondrocytes in vitro, and more importantly, establish hematopoietic microenvironment in vivo; whereas the other lines displayed uni-adipogenic, osteo-chondrogenic, or non-differentiation potential. All lines were positive for Sca-1, CD106, and CD44; MSC4 was also positive for CD90.2. In terms of immunosuppressive capacity, MSC2, MSC3, and MSC4 cells exerted clear inhibitory effects on lymphocyte proliferation, whereas MSC1 did not. Further investigation revealed that the NO and not the PGE2 pathway may play a role in the different immunomodulatory effects of the cell lines. To clarify the molecular basis of this heterogeneity, we employed RNA sequencing to compare the gene expression profiles of the four subtypes, revealing a relationship between gene expression and variability in subtype function. This study provides novel information about the heterogeneity of MSCs and insight into the selection of optimal cell sources for therapeutic applications.
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Affiliation(s)
- Junxia Lei
- Center for Stem Cell Biology and Tissue Engineering, The Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, PR China
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53
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Siegel G, Kluba T, Hermanutz-Klein U, Bieback K, Northoff H, Schäfer R. Phenotype, donor age and gender affect function of human bone marrow-derived mesenchymal stromal cells. BMC Med 2013; 11:146. [PMID: 23758701 PMCID: PMC3694028 DOI: 10.1186/1741-7015-11-146] [Citation(s) in RCA: 332] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 05/17/2013] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Mesenchymal stromal cells (MSCs) are attractive for cell-based therapies ranging from regenerative medicine and tissue engineering to immunomodulation. However, clinical efficacy is variable and it is unclear how the phenotypes defining bone marrow (BM)-derived MSCs as well as donor characteristics affect their functional properties. METHODS BM-MSCs were isolated from 53 (25 female, 28 male; age: 13 to 80 years) donors and analyzed by: (1) phenotype using flow cytometry and cell size measurement; (2) in vitro growth kinetics using population doubling time; (3) colony formation capacity and telomerase activity; and (4) function by in vitro differentiation capacity, suppression of T cell proliferation, cytokines and trophic factors secretion, and hormone and growth factor receptor expression. Additionally, expression of Oct4, Nanog, Prdm14 and SOX2 mRNA was compared to pluripotent stem cells. RESULTS BM-MSCs from younger donors showed increased expression of MCAM, VCAM-1, ALCAM, PDGFRβ, PDL-1, Thy1 and CD71, and led to lower IL-6 production when co-cultured with activated T cells. Female BM-MSCs showed increased expression of IFN-γR1 and IL-6β, and were more potent in T cell proliferation suppression. High-clonogenic BM-MSCs were smaller, divided more rapidly and were more frequent in BM-MSC preparations from younger female donors. CD10, β1integrin, HCAM, CD71, VCAM-1, IFN-γR1, MCAM, ALCAM, LNGFR and HLA ABC were correlated to BM-MSC preparations with high clonogenic potential and expression of IFN-γR1, MCAM and HLA ABC was associated with rapid growth of BM-MSCs. The mesodermal differentiation capacity of BM-MSCs was unaffected by donor age or gender but was affected by phenotype (CD10, IFN-γR1, GD2). BM-MSCs from female and male donors expressed androgen receptor and FGFR3, and secreted VEGF-A, HGF, LIF, Angiopoietin-1, basic fibroblast growth factor (bFGF) and NGFB. HGF secretion correlated negatively to the expression of CD71, CD140b and Galectin 1. The expression of Oct4, Nanog and Prdm14 mRNA in BM-MSCs was much lower compared to pluripotent stem cells and was not related to donor age or gender. Prdm14 mRNA expression correlated positively to the clonogenic potential of BM-MSCs. CONCLUSIONS By identifying donor-related effects and assigning phenotypes of BM-MSC preparations to functional properties, we provide useful tools for assay development and production for clinical applications of BM-MSC preparations.
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Affiliation(s)
- Georg Siegel
- Institute of Clinical and Experimental Transfusion Medicine (IKET), University Hospital Tübingen, Otfried-Müller-Strasse 4/1, Tübingen, D-72076, Germany
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Russell KC, Tucker HA, Bunnell BA, Andreeff M, Schober W, Gaynor AS, Strickler KL, Lin S, Lacey MR, O'Connor KC. Cell-surface expression of neuron-glial antigen 2 (NG2) and melanoma cell adhesion molecule (CD146) in heterogeneous cultures of marrow-derived mesenchymal stem cells. Tissue Eng Part A 2013; 19:2253-66. [PMID: 23611563 DOI: 10.1089/ten.tea.2012.0649] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Cellular heterogeneity of mesenchymal stem cells (MSCs) impedes their use in regenerative medicine. The objective of this research is to identify potential biomarkers for the enrichment of progenitors from heterogeneous MSC cultures. To this end, the present study examines variation in expression of neuron-glial antigen 2 (NG2) and melanoma cell adhesion molecule (CD146) on the surface of MSCs derived from human bone marrow in response to culture conditions and among cell populations. Multipotent cells isolated from heterogeneous MSC cultures exhibit a greater than three-fold increase in surface expression for NG2 and greater than two-fold increase for CD146 as compared with parental and lineage-committed MSCs. For both antigens, surface expression is downregulated by greater than or equal to six-fold when MSCs become confluent. During serial passage, maximum surface expression of NG2 and CD146 is associated with minimum doubling time. Upregulation of NG2 and CD146 during loss of adipogenic potential at early passage suggests some limits to their utility as potency markers. A potential relationship between proliferation and antigen expression was explored by sorting heterogeneous MSCs into rapidly and slowly dividing groups. Fluorescence-activated cell sorting revealed that rapidly dividing MSCs display lower scatter and 50% higher NG2 surface expression than slowly dividing cells, but CD146 expression is comparable in both groups. Heterogeneous MSCs were sorted based on scatter properties and surface expression of NG2 and CD146 into high (HI) and low (LO) groups. Sc(LO)NG2(HI) and Sc(LO)NG2(HI)CD146(HI) MSCs have the highest proliferative potential of the sorted groups, with colony-forming efficiencies that are 1.5-2.2 times the value for the parental controls. The Sc(LO) gate enriches for rapidly dividing cells. Addition of the NG2(HI) gate increases cell survival to 1.5 times the parental control. Further addition of the CD146(HI) gate does not significantly improve cell division or survival. The combination of low scatter and high NG2 surface expression is a promising selection criterion to enrich a proliferative phenotype from heterogeneous MSCs during ex vivo expansion, with potentially numerous applications.
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Affiliation(s)
- Katie C Russell
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
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55
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Conese M, Carbone A, Castellani S, Di Gioia S. Paracrine effects and heterogeneity of marrow-derived stem/progenitor cells: relevance for the treatment of respiratory diseases. Cells Tissues Organs 2013; 197:445-73. [PMID: 23652321 DOI: 10.1159/000348831] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2013] [Indexed: 11/19/2022] Open
Abstract
Stem cell-based treatment may represent a hope for the treatment of acute lung injury and pulmonary fibrosis, and other chronic lung diseases, such as cystic fibrosis, asthma and chronic obstructive pulmonary disease (COPD). It is well established in preclinical models that bone marrow-derived stem and progenitor cells exert beneficial effects on inflammation, immune responses and repairing of damage in virtually all lung-borne diseases. While it was initially thought that the positive outcome was due to a direct engraftment of these cells into the lung as endothelial and epithelial cells, paracrine factors are now considered the main mechanism through which stem and progenitor cells exert their therapeutic effect. This knowledge has led to the clinical use of marrow cells in pulmonary hypertension with endothelial progenitor cells (EPCs) and in COPD with mesenchymal stromal (stem) cells (MSCs). Bone marrow-derived stem cells, including hematopoietic stem/progenitor cells, MSCs, EPCs and fibrocytes, encompass a wide array of cell subsets with different capacities of engraftment and injured tissue-regenerating potential. The characterization/isolation of the stem cell subpopulations represents a major challenge to improve the efficacy of transplantation protocols used in regenerative medicine and applied to lung disorders.
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Affiliation(s)
- Massimo Conese
- Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy.
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56
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Mesenchymal stromal cells: misconceptions and evolving concepts. Cytotherapy 2013; 15:140-5. [DOI: 10.1016/j.jcyt.2012.11.005] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 11/01/2012] [Accepted: 11/06/2012] [Indexed: 12/17/2022]
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57
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Deskins DL, Bastakoty D, Saraswati S, Shinar A, Holt GE, Young PP. Human mesenchymal stromal cells: identifying assays to predict potency for therapeutic selection. Stem Cells Transl Med 2013; 2:151-8. [PMID: 23362238 DOI: 10.5966/sctm.2012-0099] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Multipotent mesenchymal stromal cells (MSCs) have the potential to repair and regenerate damaged tissues, making them attractive candidates for cell-based therapies. To maximize efficacy of MSCs, prediction of their therapeutic abilities must be made so that only the best cells will be used. Our goal was to identify feasible and reproducible in vitro assays to predict MSC potency. We generated cell lines from 10 normal human bone marrow samples and used the International Society for Cellular Therapy's minimal criteria to define them as MSCs: plastic adherence, appropriate surface marker expression, and trilineage differentiation. Each MSC line was further characterized by its growth, proliferation, and viability as determined by cell count, bromodeoxyuridine incorporation, and cellular ATP levels, respectively. To determine whether these tests reliably predict the therapeutic aptitude of the MSCs, several lines were implanted in vivo to examine their capacity to engraft and form granulation tissue in a well-established murine wound model using polyvinyl alcohol sponges. Long-term engraftment of MSCs in the sponges was quantified through the presence of the human-specific Alu gene in sponge sections. Sections were also stained for proliferating cells, vascularity, and granulation tissue formation to determine successful engraftment and repair. We found that high performance in a combination of the in vitro tests accurately predicted which lines functioned well in vivo. These findings suggest that reliable and reproducible in vitro assays may be used to measure the functional potential of MSCs for therapeutic use.
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Affiliation(s)
- Desirae L Deskins
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA
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58
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Ragni E, Viganò M, Rebulla P, Giordano R, Lazzari L. What is beyond a qRT-PCR study on mesenchymal stem cell differentiation properties: how to choose the most reliable housekeeping genes. J Cell Mol Med 2013; 17:168-80. [PMID: 23305553 PMCID: PMC3823147 DOI: 10.1111/j.1582-4934.2012.01660.x] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 10/10/2012] [Indexed: 12/18/2022] Open
Abstract
In the last years, mesenchymal stem cells (MSCs) have been identified as an attractive cell population in regenerative medicine. In view of future therapeutic applications, the study of specific differentiation-related gene expression is a pivotal prerequisite to define the most appropriate MSC source for clinical translation. In this context, it is crucial to use stable housekeeping genes (HGs) for normalization of qRT-PCR to obtain validated and comparable results. By our knowledge, an exhaustive validation study of HGs comparing MSCs from different sources under various differentiation conditions is still missing. In this pivotal study, we compared the expression levels of 12 genes (ACTB, Β2M, EF1alpha, GAPDH, GUSB, PPIA, RPL13A, RPLP0, TBP, UBC, YWHAZ and 18S rRNA) to assess their suitability as HGs in MSCs during adipogenic, osteogenic and chondrogenic differentiation. We demonstrated that many of the most popular HGs including 18S rRNA, B2M and ACTB were inadequate for normalization, whereas TBP/YWHAZ/GUSB were frequently identified among the best performers. Moreover, we showed the dramatic effects of suboptimal HGs choice on the quantification of cell differentiation markers, thus interfering with a reliable comparison of the lineage potential properties among various MSCs. Thus, in the emerging field of regenerative medicine, the identification of the most appropriate MSC source and cell line is so crucial for the treatment of patients that being inaccurate in the first step of the stem cell characterization can bring important consequences for the patients and for the promising potential of stem cell therapy.
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Affiliation(s)
- Enrico Ragni
- Cell Factory Franco Calori, Center for Transfusion Medicine, Cellular Therapy and Cryobiology, Department of Regenerative Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy
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59
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Abstract
The past decade has seen tremendous growth in the clinical application of cell-based therapies, and the number of planned human clinical trials to evaluate these therapies continues to increase in number and scope at a rapid pace. A considerable effort on this front has been devoted to evaluating the therapeutic potential of mesenchymal stem cells (MSCs), which were initially characterized as connective tissue progenitors resident in bone marrow. MSCs are now known to possess potent tissue reparative properties that have been linked to secretion of paracrine-acting angiogenic, trophic, anti-inflammatory, and immunomodulatory factors. Accordingly, MSC-based therapies are being evaluated for the treatment of a broad array of ischemic, inflammatory, and immunological disorders. Nevertheless, knowledge regarding how the wide-ranging activities of MSCs vary between and are specified within populations remains largely unexplored. Lack of such knowledge makes it difficult to predict and/or control how sampling bias and ex vivo expansion of populations alters their biological activity and therapeutic potency. Herein, we discuss how heterogeneity of MSC populations may explain, in part, disparate outcomes in both experimental animal and human clinical trial data, and discuss several strategies to achieve more reproducible and efficacious outcomes for MSC-based therapies.
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60
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Phinney DG. Functional heterogeneity of mesenchymal stem cells: implications for cell therapy. J Cell Biochem 2012; 113:2806-12. [PMID: 22511358 DOI: 10.1002/jcb.24166] [Citation(s) in RCA: 301] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The term mesenchymal stem cell (MSCs) was adopted in the 1990s to describe a population of bone-marrow-derived cells that demonstrated the capacity for tri-lineage differentiation at a clonal level. Research conducted during the ensuing decades has demonstrated that MSCs fulfill many functions in addition to connective tissue progenitors including contributing to the HSC niche and regulating the function of immune effector cells of both the innate and adaptive immune system. Despite these advances, fundamental aspects of MSC biology remain indeterminate. For example, the embryonic origin of MSCs and their niche in vivo remains a highly debated topic. More importantly, the mechanisms that regulate self-renewal and lineage specification have also been largely unexplored. The later is significant in that MSC population's exhibit considerable donor-to-donor and intra-population heterogeneity but knowledge regarding how different functional attributes of MSCs are specified at the population level is unknown. This poses significant obstacles in research and in efforts to develop clinical manufacturing protocols that reproducibly generate functionally equivalent MSC populations. Herein, I discuss data demonstrating that MSC populations are intrinsically heterogeneous, elaborate on the molecular basis for this heterogeneity, and discuss how heterogeneity impacts clinical manufacturing and the therapeutic potency of MSCs.
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Affiliation(s)
- Donald G Phinney
- Department of Molecular Therapeutics, The Scripps Research Institute, Jupiter, Florida 33458, USA.
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61
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Di Maggio N, Mehrkens A, Papadimitropoulos A, Schaeren S, Heberer M, Banfi A, Martin I. Fibroblast Growth Factor-2 Maintains a Niche-Dependent Population of Self-Renewing Highly Potent Non-adherent Mesenchymal Progenitors Through FGFR2c. Stem Cells 2012; 30:1455-64. [DOI: 10.1002/stem.1106] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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62
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Baer PC, Geiger H. Adipose-derived mesenchymal stromal/stem cells: tissue localization, characterization, and heterogeneity. Stem Cells Int 2012; 2012:812693. [PMID: 22577397 PMCID: PMC3345279 DOI: 10.1155/2012/812693] [Citation(s) in RCA: 309] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 02/12/2012] [Indexed: 12/13/2022] Open
Abstract
Adipose tissue as a stem cell source is ubiquitously available and has several advantages compared to other sources. It is easily accessible in large quantities with minimal invasive harvesting procedure, and isolation of adipose-derived mesenchymal stromal/stem cells (ASCs) yields a high amount of stem cells, which is essential for stem-cell-based therapies and tissue engineering. Several studies have provided evidence that ASCs in situ reside in a perivascular niche, whereas the exact localization of ASCs in native adipose tissue is still under debate. ASCs are isolated by their capacity to adhere to plastic. Nevertheless, recent isolation and culture techniques lack standardization. Cultured cells are characterized by their expression of characteristic markers and their capacity to differentiate into cells from meso-, ecto-, and entodermal lineages. ASCs possess a high plasticity and differentiate into various cell types, including adipocytes, osteoblasts, chondrocytes, myocytes, hepatocytes, neural cells, and endothelial and epithelial cells. Nevertheless, recent studies suggest that ASCs are a heterogeneous mixture of cells containing subpopulations of stem and more committed progenitor cells. This paper summarizes and discusses the current knowledge of the tissue localization of ASCs in situ, their characterization and heterogeneity in vitro, and the lack of standardization in isolation and culture methods.
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Affiliation(s)
- Patrick C. Baer
- Division of Nephrology, Department of Internal Medicine III, Johann Wolfgang Goethe University, 60590 Frankfurt, Germany
| | - Helmut Geiger
- Division of Nephrology, Department of Internal Medicine III, Johann Wolfgang Goethe University, 60590 Frankfurt, Germany
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63
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Schellenberg A, Stiehl T, Horn P, Joussen S, Pallua N, Ho AD, Wagner W. Population dynamics of mesenchymal stromal cells during culture expansion. Cytotherapy 2012; 14:401-11. [DOI: 10.3109/14653249.2011.640669] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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64
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O'Connor KC, Russell KC, Phinney DG, Lacey MR, Barrilleaux BL, Meyertholen KE. High-capacity assay to quantify the clonal heterogeneity in potency of mesenchymal stem cells. BMC Proc 2011; 5 Suppl 8:O14. [PMID: 22373225 PMCID: PMC3284945 DOI: 10.1186/1753-6561-5-s8-o14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Kim C O'Connor
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
| | - Katie C Russell
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
| | | | - Michelle R Lacey
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
| | - Bonnie L Barrilleaux
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
| | - Kristin E Meyertholen
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
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