Abstract: The invention provides novel methods of reducing transplant rejection and cardiac allograft vasculopathy in humans by employing the implantation of autologous progenitor cells into the transplanted donor heart. The autologous progenitor cells can be vascular progenitor cells (VPCs) and/or myocyte progenitor cells (MPCs) isolated from the recipient's explanted heart. Alternatively, bone marrow progenitor cells (BMPCs) isolated from the recipient may also be used.

Abstract: The invention provides compositions of histone deacetylase (HDAC) inhibitors and progenitor cells useful for treating heart failure in a subject. The invention also provides methods of restoring progenitor cell function to aged progenitor cells and methods for enhancing progenitor cell proliferation and/or differentiation using HDAC inhibitors.

Abstract: The invention provides compositions of adult cardiac vascular progenitor cells (VPCs) and adult cardiac myocyte progenitor cells (MPCs) useful for the treatment of various cardiac conditions. The invention also encompasses methods of generating a biological bypass, repairing damaged myocardium, and treating or preventing hypertensive cardiomyopathy and heart failure with the compositions of the invention. Methods of isolating the cardiac progenitor cells are also disclosed.