Figure 2: Hydrogen peroxide induced apoptosis in MSCs. (A-C) Representative tunel staining images of MSC cells after treatment with hydrogen peroxide (H2O2). (A) MSCs with H2O2 treatment for 6 hr. (B) pCDH-MSCs with H2O2 treatment for 6 hr. (C) hOXR1-MSCs with H2O2 treatment for 6 hr. (D) Quantitative analysis of apoptotic cells expressed as a percentage of total cell number (p< 0.05). Each bar represents the average of 5 observations per group.