Figure 5
Dose-dependent inhibition of Stat3 phosphorylation and down-regulated Stat3-mediated antiapoptotic proteins by CDDO-Me. Parental cells KHOS, U-2OS (A) and MDR cells KHOSR2, U-2OSTR (B) were treated with CDDDO-Me for 24 hours in and then harvested and processed for Western blotting. For Western blot analysis, 30 μg of total cellular proteins were subjected to immunoblotting with specific antibodies.