title: Differential myocardial infarct repair with muscle stem cells compared to myoblasts.
abstract: Myoblast transplantation for cardiac repair has generated beneficial results in both animals and humans; however, poor viability and poor engraftment of myoblasts after implantation in vivo limit their regeneration capacity. We and others have identified and isolated a subpopulation of skeletal muscle-derived stem cells (MDSCs) that regenerate skeletal muscle more effectively than myoblasts. Here we report that in comparison with a myoblast population, MDSCs implanted into infarcted hearts displayed greater and more persistent engraftment, induced more neoangiogenesis through graft expression of vascular endothelial growth factor, prevented cardiac remodeling, and elicited significant improvements in cardiac function. MDSCs also exhibited a greater ability to resist oxidative stress-induced apoptosis compared to myoblasts, which may partially explain the improved engraftment of MDSCs. These findings indicate that MDSCs constitute an alternative to other myogenic cells for use in cardiac repair applications.
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh, PA 15213-2582, USA.
authors.forename: Hideki
authors.initials: H
authors.lastname: Oshima
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Payne
authors.forename: Kenneth L
authors.initials: KL
authors.lastname: Urish
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Sakai
authors.forename: Yiqun
authors.initials: Y
authors.lastname: Ling
authors.forename: Burhan
authors.initials: B
authors.lastname: Gharaibeh
authors.forename: Kimimasa
authors.initials: K
authors.lastname: Tobita
authors.forename: Bradley B
authors.initials: BB
authors.lastname: Keller
authors.forename: James H
authors.initials: JH
authors.lastname: Cummins
authors.forename: Johnny
authors.initials: J
authors.lastname: Huard
mesh_terms: D000818:Animals; D017209:Apoptosis; D002478:Cells, Cultured; D018031:Connexin 43 / Q000378:metabolism; D017629:Gap Junctions; D007150:Immunohistochemistry; D007763:Lac Operon; D008297:Male; D051379:Mice; D016513:Mice, SCID; D015233:Models, Statistical; D032342:Muscle Cells / Q000378:metabolism; D018482:Muscle, Skeletal / Q000473:pathology*; D009132:Muscles / Q000378:metabolism / Q000473:pathology*; D009203:Myocardial Infarction / Q000628:therapy*; D009206:Myocardium / Q000473:pathology; D009389:Neovascularization, Pathologic; D018384:Oxidative Stress; D010641:Phenotype; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000096:biosynthesis; D012038:Regeneration; D013234:Stem Cells / Q000166:cytology*; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism; D014945:Wound Healing
chemical_list: D018031:Connexin 43; D019408:Platelet Endothelial Cell Adhesion Molecule-1; D042461:Vascular Endothelial Growth Factor A