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Wang X, Chun YW, Zhong L, Chiusa M, Balikov DA, Frist AY, Lim CC, Maltais S, Bellan L, Hong CC, Sung HJ. A temperature-sensitive, self-adhesive hydrogel to deliver iPSC-derived cardiomyocytes for heart repair. Int J Cardiol 2015; 190:177-80. [PMID: 25918074 DOI: 10.1016/j.ijcard.2015.04.139] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 10/23/2022]
Affiliation(s)
- Xintong Wang
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Young Wook Chun
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States; Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States
| | - Lin Zhong
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States
| | - Manuel Chiusa
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States
| | - Daniel A Balikov
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Audrey Y Frist
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States
| | - Chee C Lim
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States
| | - Simon Maltais
- Department of Surgery, Vanderbilt University, Nashville, TN 37235, United States
| | - Leon Bellan
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States; Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Charles C Hong
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States; Department of Research Medicine, Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN 37212.
| | - Hak-Joon Sung
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States; Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University, Nashville, TN 37235, United States.
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Tario JD, Muirhead KA, Pan D, Munson ME, Wallace PK. Tracking immune cell proliferation and cytotoxic potential using flow cytometry. Methods Mol Biol 2011; 699:119-64. [PMID: 21116982 PMCID: PMC4371793 DOI: 10.1007/978-1-61737-950-5_7] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In the second edition of this series, we described the use of cell tracking dyes in combination with tetramer reagents and traditional phenotyping protocols to monitor levels of proliferation and cytokine production in antigen-specific CD8(+) T cells. In particular, we illustrated how tracking dye fluorescence profiles could be used to ascertain the precursor frequencies of different subsets in the T-cell pool that are able to bind tetramer, synthesize cytokines, undergo antigen-driven proliferation, and/or carry out various combinations of these functional responses.Analysis of antigen-specific proliferative responses represents just one of many functions that can be monitored using cell tracking dyes and flow cytometry. In this third edition, we address issues to be considered when combining two different tracking dyes with other phenotypic and viability probes for the assessment of cytotoxic effector activity and regulatory T-cell functions. We summarize key characteristics of and differences between general protein- and membrane-labeling dyes, discuss determination of optimal staining concentrations, and provide detailed labeling protocols for both dye types. Examples of the advantages of two-color cell tracking are provided in the form of protocols for (a) independent enumeration of viable effector and target cells in a direct cytotoxicity assay and (b) simultaneous monitoring of proliferative responses in effector and regulatory T cells.
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Affiliation(s)
- Joseph D Tario
- Department of Flow and Image Cytometry, Roswell Park Cancer Institute, Buffalo, NY, USA
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Tan G, Shim W, Gu Y, Qian L, Chung YY, Lim SY, Yong P, Sim E, Wong P. Differential effect of myocardial matrix and integrins on cardiac differentiation of human mesenchymal stem cells. Differentiation 2010; 79:260-71. [PMID: 20307924 DOI: 10.1016/j.diff.2010.02.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2009] [Revised: 02/10/2010] [Accepted: 02/24/2010] [Indexed: 10/19/2022]
Abstract
Dysregulation of matrix synthesis during myocardial fibrosis in post-infarct ventricular remodeling contributes to ventricular dysfunction. Bone marrow stem cell transplantation prevents functional deterioration following myocardial infarction. However, effect of myocardial extracellular matrix (ECM) on stem cell differentiation is poorly understood. We investigate the role of collagen matrices and integrin system in cardiac differentiation and engraftment of stem cells in infarcted myocardium. Sternum-derived bone marrow mesenchymal stem cells (MSCs) were differentiated into cardiomyocyte-like cells (CLCs). They were characterized using RT-PCR, immunofluorescence, flow cytometry and functional integrin neutralization assays. CLCs were injected into peri-infarct borders of injured myocardium of Wistar rats one week following left anterior descending (LAD) artery ligation. Cardiac function was analyzed via pressure-volume relationships. Cardiac differentiated CLCs displayed collagen V specificity, which was absent in undifferentiated MSCs. Collagen V, but not collagen I matrix, promoted attachment, proliferation and cardiac differentiation of CLCs. In contrast to beta(1), alpha(v) integrin contributed minimally in the attachment of CLCs on collagen matrices. However, inhibition of alpha(v)beta(3,) but not alpha(2)beta(1) integrin, selectively attenuated troponin T, sarcomeric alpha-actin and ryanodine 2 receptor gene expression in CLCs. Both MSC and CLC transplantation prevented chamber dilatation and improved contractile function. However, systolic activity in MSC transplanted animals was accompanied by heightened wall stress as demonstrated by elevated myocardial end-diastolic pressure and prolonged tissue relaxation time. Localization of CLCs in the vicinity of collagen V-expressing myofibers promoted their integration into cardiac syncytium. CLCs may facilitate hemodynamic recovery by preserving tissue elasticity in the peri-infarct borders that sustains contractile efficiency for functional recovery in an actively remodeling infarcted myocardium.
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Affiliation(s)
- Genevieve Tan
- Research and Development Unit, National Heart Centre, 9 Hospital Drive, School of Nursing, #03-02, Block C, SingHealth Research Facilities, 169612, Singapore
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Jobst BJ, Riegger GAJ, Griese DP. Endothelial Cell Seeding Fails to Prevent Intimal Hyperplasia Following Arterial Injury in the Rat Carotid Model. Cardiovasc Drugs Ther 2009; 23:343-53. [DOI: 10.1007/s10557-009-6191-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mayorga M, Finan A, Penn M. Pre-transplantation specification of stem cells to cardiac lineage for regeneration of cardiac tissue. Stem Cell Rev Rep 2009; 5:51-60. [PMID: 19184567 DOI: 10.1007/s12015-009-9050-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Accepted: 01/08/2009] [Indexed: 02/07/2023]
Abstract
Myocardial infarction (MI) is a lead cause of mortality in the Western world. Treatment of acute MI is focused on restoration of antegrade flow which inhibits further tissue loss, but does not restore function to damaged tissue. Chronic therapy for injured myocardial tissue involves medical therapy that attempts to minimize pathologic remodeling of the heart. End stage therapy for chronic heart failure (CHF) involves inotropic therapy to increase surviving cardiac myocyte function or mechanical augmentation of cardiac performance. Not until the point of heart transplantation, a limited resource at best, does therapy focus on the fundamental problem of needing to replace injured tissue with new contractile tissue. In this setting, the potential for stem cell therapy has garnered significant interest for its potential to regenerate or create new contractile cardiac tissue. While to date adult stem cell therapy in clinical trials has suggested potential benefit, there is waning belief that the approaches used to date lead to regeneration of cardiac tissue. As the literature has better defined the pathways involved in cardiac differentiation, preclinical studies have suggested that stem cell pretreatment to direct stem cell differentiation prior to stem cell transplantation may be a more efficacious strategy for inducing cardiac regeneration. Here we review the available literature on pre-transplantation conditioning of stem cells in an attempt to better understand stem cell behavior and their readiness in cell-based therapy for myocardial regeneration.
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Affiliation(s)
- Maritza Mayorga
- Skirball Laboratory for Cardiovascular Cellular Therapeutics, Center for Cardiovascular Cell Therapy, Departments of Cardiovascular Medicine and Stem Cell Biology and Regenerative Medicine, Cleveland Clinic, Cleveland, OH 44195, USA
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