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Figure 5 Histologic Study of Implanted Cells at 4 Weeks After Cell or Media Implantation

(A to D) Light photomicrographs (100x) illustrating cellular density (Masson trichrome staining; arrows = cell clusters) in the central infarcted region of young and older rats implanted with young skeletal myoblasts (SKMCs) or media (controls). (E) Quantification of cellular density in each group: young rats implanted with young SKMCs (young SKMC) or culture media (young control), and older rats implanted with young SKMCs (older SKMC) or media (older control).