Figure 1.
Harmine increases the number of preosteoclasts and the production of PDGF-BB. (A-C) qRT-PCR analysis of Atp6v0d2, Ctsk and Pdgf-bb expression levels relative to Gapdh in RAW264.7 cells treated with vehicle (DMSO), RANKL and RANKL + harmine. n = 4 per group. (D) Representative images of TRAP staining showing osteoclast and preosteoclast formation from RAW264.7 cells treated with vehicle, RANKL and RANKL + harmine. Scale bar: 50 μm. (E-F) Quantification of TRAP+ osteoclasts (OCs) and preosteoclasts (POCs). n = 3 per group. (G) Detection of PDGF-BB concentration in conditioned media (CM) from RAW264.7 cells treated with vehicle, RANKL and RANKL + harmine by ELISA. n = 5 per group. *P < 0.05 vs. un-induced group (RAW264.7 cells treated with harmine vehicle DMSO), #P < 0.05 vs. RANKL group (RAW264.7 cells treated with RANKL + DMSO).