Summary of MSC and CDC characterization by flow cytometry and immunohistochemistry (n=9 each cell type; corresponding with cell donor and passage at the time of each cell injection). The antigenic profile was similar between cell types, as MSCs and CDCs were each predominately CD90+, CD105+ and CD45−, with a small number of cKit+ cells (lower left figure). In contrast, CDCs exhibited uniform expression of the cardiac transcription factors GATA4 and Nkx2.5, demonstrating their commitment to a cardiac lineage, while MSCs did not express GATA4 or Nkx2.5 (top image and lower right figure).