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. 1999 Apr;154(4):1159–1169. doi: 10.1016/S0002-9440(10)65368-0

Figure 7.

Figure 7.

Immunohistochemical detection of canine IL-1Ra in cartilage of rabbit OA knees. A: An 8-week OA rabbit injected with the control plasmid showing no specific staining for canine IL-1Ra. B: An 8-week OA rabbit treated with 500 μg of IL-1Ra plasmid. C: An 8-week OA rabbit treated with 1000 μg of IL-1Ra plasmid showing intense specific staining for IL-1Ra, mostly at the synovial lining cell level. D: Control using a specimen from an 8-week old rabbit treated with 1000 μg of IL-1Ra plasmid performed with an immune absorbed serum using a 20-fold mass equivalent to the purified antigen showed no specific staining. Original magnification, ×100.