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Figure 5 | Arthritis Research & Therapy

Figure 5

From: Fibroblast activation protein alpha is expressed by chondrocytes following a pro-inflammatory stimulus and is elevated in osteoarthritis

Figure 5

Immunolocalisation of FAPα protein in osteoarthritic (OA) cartilage. (a) FAPα in OA cartilage specimen 1. Note positive staining (brown/black) of cells in the superficial zone. Boxed region represents low-power view of Figure 5b. (b) High-power view of FAPα in OA cartilage specimen 1. Note positive staining of the chondrocyte membrane (arrow). (c) FAPα in OA cartilage specimen 2. Note positive staining of cells in the superficial zone. (d) OA cartilage specimen 2 treated with non-immune mouse IgG as a negative control for FAPα.

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