Fig. 5From: Establishment of a bipedal rat model of lumbar facet joint osteoarthritis using intraarticular injection of urinary plasminogen activatorImmunohistochemical staining of IL-1β in saline-injected control and the uPA-injected groups at 7, 14, 28 and 42 days after surgery. Scale bar = 100 μm; *: p < 0.05; NS: no significanceBack to article page