FIGURE 5. NF-κB dysregulation after membrane depolarization in mdx myotubes is mediated by excessive ROS production.
A. NF- κB activity induced by H2O2 in wt and mdx myotubes. Cells were stimulated with different concentrations of exogenous H2O2. Luciferase activity was determined after 12h (n=3). B. NOX2 inhibition (apocynin) blunted depolarization-induced changes in NF-κB activity in both wt and mdx myotubes (n=3). C. NOX2 inhibition blocked depolarization-induced changes in IL-6 expression in both wt and mdx myotubes (n=3). D. BAPTA-AM (30 µM) blocked depolarization-induced changes in IL-6 expression in both wt myotubes *=P<0.05, **=P<0.01, ***=P<0.001 (indicated or versus basal wt value), and ns, no significant difference.