Research Article

Dehydroepiandrosterone Prevents H2O2-Induced BRL-3A Cell Oxidative Damage through Activation of PI3K/Akt Pathways rather than MAPK Pathways

Figure 8

Schematic diagram of the potential mechanisms through which DHEA protects H2O2-treated BRL-3A cells from oxidative damage and apoptosis. There are at least three parallel regulation mechanisms that contribute to the protective effects of DHEA on H2O2-treated BRL-3A cells: (1) increasing cellular antioxidative enzyme activities, thus decreasing the levels of intracellular reactive oxygen species and reducing oxidative damage; (2) reducing caspase-3 protein levels through the activation of PI3K/Akt signaling pathways, rather than MAPK signaling pathways; and (3) activating specific receptors rather than androgen and estrogen receptors.