FIGURE 6.
The MM cells line (U266, SKM-M1, and MM1) express different levels of CHIT1 activity (A) and chitinase mRNA expression CHIT1 and YKL40 (B). The treatment of U266 with BO (2.5 and 5 nM) for 24 h reduce the mRNA expression of CHIT1 and YKL40 (C). Determination of resorption pits on dentin disk showed a significant reduction in the cells treated with CHIT1 siRNA, YKL40 siRNA and in the co-silencing with CHIT1 and YKL40 siRNA (DS) compared to the negative control (SS) (D). Results are expressed as the number of resorption pits. Data are expressed as mean ± SD of at least three independent experiments.*P<0.01, **P<0.001, ***P<0.0001.