Fig. 4.
Osteoclast differentiation was induced by receptor activator for nuclear factor-κ B ligand (RANKL) in RAW 264.7 cells (2 × 103 cells/well). After 6 days, cells were fixed and then stained for TRAP activity according to the manufacturer’s protocol (A,B). The effect of GTE treated 48 h on the viability of RAW 264.7 cells as determined by the MTT assay (C). All data are presented as the mean ± SD. *p < 0.05 and **p < 0.01 versus the control group.