Fig. 3: Effect of sh-CXCL5 on the inhibition of osteoclastogenesis by MSCs.

CD14 + monocytes were cultured with HDMSCs or ASMSCs after knocking down CXCL5 in the presence of M-CSF and RANKL. a Secretion of CXCL5 from MSCs was detected by ELISA on day 3 after transfection with sh-CXCL5. b Representative images of TRAP staining (× 100). c The number of TRAP+ osteoclasts in each well is shown. d Representative images of F-actin assays (× 200). e Representative images of bone resorption assays (× 200). f Pit formation on each slide was assessed. Data are presented as the mean ± SD (n = 30). The results represent three independent experiments. *, p < 0.05; HDMSCs, mesenchymal stem cells from healthy donors; ASMSCs, mesenchymal stem cells from patients with ankylosing spondylitis