Fig. 3

PDA-PEG NPs inhibits osteoclast formation. a F-actin ring staining of BMMs treated with RANKL and various concentration of PDA-PEG NPs, ×200 magnification. b TRAP staining of BMMs on the 3rd and 7th days, ×100 magnification. c Quantification of actin ring per field. d Quantification of TRAP-positive cells per field. n = 3. Symbols “*” denotes p < 0.05, “**” denotes p < 0.01, NS indicates not significant