Figure 2.

Expression of lipocalin-type prostaglandin D synthase (L-PGDS) protein in healthy and osteoarthritis (OA) cartilage. Representative immunostaining of human healthy (a) and OA (b) cartilage for L-PGDS protein. (c) OA specimens treated with anti-L-PGDS antibody that was preadsorbed with a 20-fold molar excess of recombinant human L-PGDS (control for staining specificity). (d) Percentage of chondrocytes expressing L-PGDS in healthy and OA cartilage. Results are expressed as the mean ± standard error of the mean of nine healthy and nine OA specimens. *P < 0.05 versus healthy cartilage.