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A Thin Layer of Decellularized Porcine Myocardium for Cell Delivery. Sci Rep 2018; 8:16206. [PMID: 30385769 PMCID: PMC6212498 DOI: 10.1038/s41598-018-33946-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 10/08/2018] [Indexed: 01/11/2023] Open
Abstract
Decellularized porcine myocardium has shown many benefits as a cell delivery scaffold for cardiac therapy. However, using full thickness decellularized myocardium as cardiac patch may lead to poor viability and inhomogeneous distribution of delivered cells, due to perfusion limitations. In this study, we explored the feasibility of decellularized porcine myocardial slice (dPMS) to construct a vascularized cardiac patch for cell delivery. Decellularized porcine myocardium was sliced into thin layers (thickness~300 µm). Adipose-derived Stem cells (ASCs) obtained from rat and pig were seeded on dPMS. The viability, infiltration, and differentiation of seeded ASCs were examined. The mechanical properties of dPMSs of various thickness and native myocardium were tested. We noticed dPMS supported attachment and growth of rat and pig ASCs. Both rat and pig ASCs showed high viability, similar patterns of proliferation and infiltration within dPMS. Rat ASCs showed expression of early-endothelial markers followed by mature-endothelial marker without any additional inducers on dPMS. Using rat myocardial infarction model, we delivered ASCs using dPMS patched to the infarcted myocardium. After 1 week, a higher number of transplanted cells were present in the infarcted area when cells were delivered using dPMS versus direct injection. Compared with MI group, increased vascular formation was also observed.
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Almeida SO, Skelton RJ, Adigopula S, Ardehali R. Arrhythmia in stem cell transplantation. Card Electrophysiol Clin 2015; 7:357-70. [PMID: 26002399 DOI: 10.1016/j.ccep.2015.03.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Stem cell regenerative therapies hold promise for treating diseases across the spectrum of medicine. While significant progress has been made in the preclinical stages, the clinical application of cardiac cell therapy is limited by technical challenges. Certain methods of cell delivery, such as intramyocardial injection, carry a higher rate of arrhythmias. Other potential contributors to the arrhythmogenicity of cell transplantation include reentrant pathways caused by heterogeneity in conduction velocities between graft and host as well as graft automaticity. In this article, the arrhythmogenic potential of cell delivery to the heart is discussed.
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Affiliation(s)
- Shone O Almeida
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, 100 UCLA Medical Plaza, Suite 630 East, Los Angeles, CA 90095, USA
| | - Rhys J Skelton
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, 100 UCLA Medical Plaza, Suite 630 East, Los Angeles, CA 90095, USA; Murdoch Children's Research Institute, The Royal Children's Hospital, Cardiac Development, 50 Flemington Road, Parkville, Victoria 3052, Australia
| | - Sasikanth Adigopula
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, 100 UCLA Medical Plaza, Suite 630 East, Los Angeles, CA 90095, USA
| | - Reza Ardehali
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, 100 UCLA Medical Plaza, Suite 630 East, Los Angeles, CA 90095, USA; Eli and Edyth Broad Stem Cell Research Center, University of California, 675 Charles E Young Drive South, MRL Room 3780, Los Angeles, CA 90095, USA.
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