Figure 3

Immunohistochemistry for GROα. Synovial tissues were obtained 2 hours after intra-articular injection of 10 mg of MSU crystals. The sections were stained with anti-GROα IgG, as described in the text. A, Synovial lining cells were positively stained for GROα. B, No staining was found in control (preimmune IgG). Original magnification, × 1000.