A. TRAP staining of histological sections of tarsal joints (Scale bar: 200 μm) and B. histomorphometric analysis of the tarsal joint sections obtained from the indicated mice that developed K/BxN serum-induced arthritis. ES/BS, erosion surface per bone surface. Oc.S/BS, osteoclast surface per bone surface; N.Oc/B.Pm, number of osteoclasts per bone perimeter. n = 5 per group. Data are mean ± SEM. **p < 0.01; n.s., not statistically significant. C. Time course of joint swelling of inflammatory arthritis developed in Ctrl, Mir182ΔM/ΔM, RbpjΔM/ΔM, and Mir182ΔM/ΔMRbpjΔM/ΔM dKO mice. For each mouse, joint swelling was calculated as the sum of measurements of joint thickness of two wrists and two ankles. n = 5 per group. Joint swelling is represented as the mean ± SD for each group. n.s., not statistically significant.