Figure 4.

A) Results of MTT assays. Mitochondrial succinic dehydrogenase activities were normalized against the Teflon negative control, which was taken to be 100%. B) Summary of the combined percentage of early and late apoptotic cells in flow cytometry test. For the MSCs, groups identified with the same uppercase letters are not statistically significant (P>0.05). For the EPCs, groups identified with the same lowercase letters are not statistically significant (P>0.05). PMMA, polymethyl methacrylate.