Figure 3
Effect of chronic intermittent hypobaric hypoxia (CIHH) pretreatment on pathologic morphology of synovial tissue in collagen-induced arthritis rat. A: Control rats displayed normal synovial tissue; B: Collageniinduced arthritis (CIA) rats displayed obvious hyperplasia with inflammatory infiltration in liner and underlayer of liner; C: CIHH treated CIA (CIHH+CIA) rats did not displayed significant difference from control rats. (H-E staining × 100).