Fig. 6

IL-15 deficiency inhibited osteoclast differentiation in mice with steroid-induced ONFH. a Serum osteocalcin, BAP, BGP, and TRACP were measured with ELISA. b TRAP-positive cells in the femoral head were calculated with immunohistochemical analysis. The data were expressed as means ± SD (n = 6). **p < 0.01 versus the WT ON group