title: Implantation of mouse embryonic stem cell-derived cardiac progenitor cells preserves function of infarcted murine hearts.
abstract: Stem cell transplantation holds great promise for the treatment of myocardial infarction injury. We recently described the embryonic stem cell-derived cardiac progenitor cells (CPCs) capable of differentiating into cardiomyocytes, vascular endothelium, and smooth muscle. In this study, we hypothesized that transplanted CPCs will preserve function of the infarcted heart by participating in both muscle replacement and neovascularization. Differentiated CPCs formed functional electromechanical junctions with cardiomyocytes in vitro and conducted action potentials over cm-scale distances. When transplanted into infarcted mouse hearts, CPCs engrafted long-term in the infarct zone and surrounding myocardium without causing teratomas or arrhythmias. The grafted cells differentiated into cross-striated cardiomyocytes forming gap junctions with the host cells, while also contributing to neovascularization. Serial echocardiography and pressure-volume catheterization demonstrated attenuated ventricular dilatation and preserved left ventricular fractional shortening, systolic and diastolic function. Our results demonstrate that CPCs can engraft, differentiate, and preserve the functional output of the infarcted heart.
authors.affiliation: Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, North Carolina, United States of America. nc28@duke.edu
authors.forename: Nicolas
authors.initials: N
authors.lastname: Christoforou
authors.forename: Behzad N
authors.initials: BN
authors.lastname: Oskouei
authors.forename: Paul
authors.initials: P
authors.lastname: Esteso
authors.forename: Christine M
authors.initials: CM
authors.lastname: Hill
authors.forename: Jeffrey M
authors.initials: JM
authors.lastname: Zimmet
authors.forename: Weining
authors.initials: W
authors.lastname: Bian
authors.forename: Nenad
authors.initials: N
authors.lastname: Bursac
authors.forename: Kam W
authors.initials: KW
authors.lastname: Leong
authors.forename: Joshua M
authors.initials: JM
authors.lastname: Hare
authors.forename: John D
authors.initials: JD
authors.lastname: Gearhart
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002460:Cell Line; D002478:Cells, Cultured; D004195:Disease Models, Animal; D004452:Echocardiography; D053595:Embryonic Stem Cells / Q000637:transplantation*; D005260:Female; D053208:Kaplan-Meier Estimate; D051379:Mice; D009203:Myocardial Infarction / Q000401:mortality / Q000628:therapy*; D032383:Myocytes, Cardiac / Q000166:cytology / Q000637:transplantation*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D033581:Stem Cell Transplantation / Q000379:methods