hCVPC-promoted angiogenesis and antiapoptosis of cardiomyocytes are blunted by STAT6KO. (A) Representative TUNEL-stained images of the border zone in MI mouse heart. Scale bar, 100 μm. (B) Quantification of TUNEL+ cardiomyocytes. n = 3 hearts each. Representative of immunochemistry staining for CD31+ endothelial cells (C) and α-SMA+ blood vessels (D) at day 28 post-MI. Scale bar, 100 μm. Quantification of CD31 (E) and α-SMA for blood vessels (F) at day 28 post-MI. n = 4 hearts each. *p < 0.05, **p < 0.01, ***p < 0.001, and n.s., no statistical significance.