Figure 6.

Effects of AhR Antagonists on AhR, COX-2, RANKL, and PGE2, CXCR4, CXCL12 expressions. MG-63 cells were cultured for 72 h with toluene (vehicle control), 10 nM TCDD and 10 nM TCDD plus CH-223191 for 72 h. (A) AhR, COX-2 and RANKL protein levels were measured by western blot analysis. (B) AhR protein levels at 72 h. (C) COX-2 protein levels at 72 h. (D) RANKL protein levels at 72 h. Data are presented as the mean ± standard error of the mean (n=3). *P<0.05, **P<0.01 and ***P<0.005 vs. the toluene-treated control (n=3). CH, 10 µM CH-223191; TCDD, 2,3,7,8-tetrachlorodibenzo-p-dioxin; COX-2, cyclooxygenase-2; RANKL, receptor activator of nuclear factor-κB ligand.