(A) The Western blotting experiment indicated that p65 overexpression stimulated the p65 nuclear accumulation, and partially rescue the translocation of p65 from the 50 nM ROC-A inhibition; (B) The luciferase assay demonstrated that p65 overexpression stimulated NF-κB transcriptional activity, and partially rescued the NF-κB activity from 50 nM ROC-A inhibition. (C) At a concentration of 50 nM, ROC-A prevented the suppression of ALP activity from 10 ng/ml TNF-α; however, this effect was reduced by the overexpression of p65 (n > 3, *p < 0.05, **p < 0.01). (D–F) At a concentration of 50 nM, ROC-A prevented the suppression of ColI, Ocn and Bsp gene expression by 10 ng/ml TNF-α, however, this effect was reduced by the overexpression of p65 (n > 3, *p < 0.05, **p < 0.01).