Decrease of mitochondrial HKII during H2O2-induced MSC cell death. MSCs were exposed to increasing concentrations of H2O2 simulating ROS for 6 h. a Cell viability of MSCs exposed to varying concentrations of H2O2. *p < 0.05 compared to Control. b Time dependent changes of mitochondrial and cytosolic expressions of HKII in MSCs exposed to H2O2. **p < 0.05 compared to Control. The quantitative data were expressed as the mean ± s.e.m of at least three independent experiments.