Figure 2. TRAIL-induced osteoclast bone resorption activity is TRAF6-dependent.
(A). Human monocytes were plated on an artificial bone matrix slide (calcium phosphate apatite-coated plate; OAAS) and were cultured with TRAIL (500 ng/ml) as well as M-CSF (50 ng/ml) and RANKL (100 ng/ml) in the presence or absence of TRAF6 siRNA, control siRNA (Crtl siRNA), TRAF6 decoy peptide (T6DP), control peptide (Crtl peptide), or osteoprotegerin (OPG) as indicated. Cells were detached after 30 days of culture. The number of resorption pits and resorptive area in each well was observed and counted using a microscope. (B). The resorption pits were photographed and the resorptive area in each well was counted. Data in (B) represent the mean±SD from five independent experiments. *p < 0.05, **p < 0.005.
