Stem Cells and Cardiovascular Repair: We propose a comprehensive program on myocardial infarct repair using adult and pluripotent human stem cells, with an emphasis on pre-clinical translation. There are 3 projects and 3 cores. Project 1 (Murry, Schwartz, Mahoney) focuses on vascularization, beginning with transplants of clinically relevant sources of human cardiomyocytes, endothelium and MSCs. Next, they transplant a multipotent human cardiovascular progenitor from ESCs, capable of generating cardiomyocytes, endothelium and smooth muscle, to generate vascularized myocardium in the infarct. Finally, they explore mechanisms through which grafts induce collateral arterialization from the host coronaries. Project 2 (Laflamme, Santana) studies the electro-physiology of human cardiomyocytes, using genetic selection to generate pacemaker vs. working-type cells. They will identify signaling pathways that specify hESC-derived myocytes into working-type vs. pacemaker phenotypes, with a goal of determining if pacemaker cells are precursors of the working-type cells or a separate stable branch. Lastly, they use cell transplantation to assess the ability of the different myocyte subtypes to couple with host cardiomyocytes and test their differential effects on electrical stability. Project 3 (Torok-Storb, Bowen-Pope) develops a pre-clinical model in the dog for cardiac repair. They will generate a system for scalable production of cardiomyocytes from their recently generated canine induced pluripotent stem cells (iPSCs). Next, they investigate if MSCs can pro-mote repair by endogenous cells and exogenous cardio-myocytes, including testing if MSCs induce third-party tolerance to allogeneic cardiomyocytes. Finally, they perform transplantation studies with canine iPSC-derived cardiomyocytes and MSCs, creating a clinically relevant model of cardiac stem cell therapy in the dog. Projects are supported by a Stem Cell Core (A) that trains investigators in hESC use and provides differentiated cells i.e., cardiomyocytes;an Out-comes Core (B) provides histology services, a central source of expertise in animal models of myocardial infarction, cell transplantation and physiological assessment;and an Administrative Core (C) to coordinate meetings, seminar series, provide fiscal support and plan the annual PPG retreat.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Program Projects (P01)
Project #
5P01HL094374-05
Application #
8676866
Study Section
Heart, Lung, and Blood Initial Review Group (HLBP)
Program Officer
Lundberg, Martha
Project Start
2010-06-01
Project End
2015-05-31
Budget Start
2014-06-01
Budget End
2015-05-31
Support Year
5
Fiscal Year
2014
Total Cost
$2,478,815
Indirect Cost
$886,117
Name
University of Washington
Department
Pathology
Type
Schools of Medicine
DUNS #
605799469
City
Seattle
State
WA
Country
United States
Zip Code
98195
Palpant, Nathan J; Pabon, Lil; Friedman, Clayton E et al. (2017) Generating high-purity cardiac and endothelial derivatives from patterned mesoderm using human pluripotent stem cells. Nat Protoc 12:15-31
Kadota, Shin; Pabon, Lil; Reinecke, Hans et al. (2017) In Vivo Maturation of Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes in Neonatal and Adult Rat Hearts. Stem Cell Reports 8:278-289
Palpant, Nathan J; Wang, Yuliang; Hadland, Brandon et al. (2017) Chromatin and Transcriptional Analysis of Mesoderm Progenitor Cells Identifies HOPX as a Regulator of Primitive Hematopoiesis. Cell Rep 20:1597-1608
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Eschenhagen, Thomas; Bolli, Roberto; Braun, Thomas et al. (2017) Cardiomyocyte Regeneration: A Consensus Statement. Circulation 136:680-686
Ruan, Jia-Ling; Tulloch, Nathaniel L; Razumova, Maria V et al. (2016) Mechanical Stress Conditioning and Electrical Stimulation Promote Contractility and Force Maturation of Induced Pluripotent Stem Cell-Derived Human Cardiac Tissue. Circulation 134:1557-1567
Roberts, Meredith A; Tran, Dominic; Coulombe, Kareen L K et al. (2016) Stromal Cells in Dense Collagen Promote Cardiomyocyte and Microvascular Patterning in Engineered Human Heart Tissue. Tissue Eng Part A 22:633-44
Qin, Wan; Roberts, Meredith A; Qi, Xiaoli et al. (2016) Depth-resolved 3D visualization of coronary microvasculature with optical microangiography. Phys Med Biol 61:7536-7550
Thomson, Kassandra S; Odom, Guy L; Murry, Charles E et al. (2016) Translation of Cardiac Myosin Activation with 2-deoxy-ATP to Treat Heart Failure via an Experimental Ribonucleotide Reductase-Based Gene Therapy. JACC Basic Transl Sci 1:666-679
Kolwicz Jr, Stephen C; Odom, Guy L; Nowakowski, Sarah G et al. (2016) AAV6-mediated Cardiac-specific Overexpression of Ribonucleotide Reductase Enhances Myocardial Contractility. Mol Ther 24:240-250

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