Figure 7.

Total and cardiomyocyte proliferation in the left ventricle wall 14 days after myocardial infarction and delivery of CPC-based cell sheets. (a) Representative images of cardiomyocyte proliferation in control group and after cell sheet treatment. Two weeks after epicardial delivery of the CPC sheet, the heart sections were costained with the antibodies against the cell-proliferation-associated antigen-Ki67 (red fluorescence) and cardiomyocyte marker, Troponin I (green fluorescence). Combined red and green fluorescence and DAPI-stained nuclei (blue) are shown in merged images. Arrows indicate costained proliferated cardiomyocytes. (b) Bar graphs show quantitative data of the number of total proliferating cells in border or infarct zones and cardiomyocyte proliferation. Data is presented as mean±SD. ∗p<0.05 versus control.