Effect of BRB on the protein expression of iNOS, COX-2, and c-Jun in preneoplastic lesions at week 25. The indicated proteins were detected by Western blot analyses. Representative blots are shown, similar results were obtained from triplicate experiments. Columns, mean relative densitometric intensities; bars, ± SE; *, P < 0.05; **, P < 0.005 as determined by ANOVA when compared with the control diet group. □, Normal control; , NMBA control; , NMBA+BRB.