Patch Morphology after 28 days

Patch Morphology 28 Days After Implantation In Vivo(A) Representative images of rat hearts show the outer border of the patches depicted by the yellow dotted line. (B) Patch area was quantified using computerized planimetry. The patch area increased in all groups from the original size of 39 mm2(red dotted line) at the time of SVR. Patch area in the Old group was significantly larger after implantation than that in the other groups. The addition of cytokines significantly prevented patch expansion. (C) Representative images of heart slices stained with Masson’s trichrome. Arrows indicate patch thickness. (D) Patch thickness was quantified using computerized planimetry. The patches in the Old group were significantly thinner than patches in the Young and Young + GF groups. Cytokine enhancement did not significantly increase patch thickness for old or young cells. *p < 0.05, **p < 0.01 vs. Old; Old n = 5, Young n = 8, Old + GF n = 6, Young + GF n = 8. GF = growth factor.

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