Figure 3.

Synovial levels of the prostaglandin D₂ (PGD₂) metabolite 11β-PGF₂α. 11β-PGF₂α levels were measured in synovial fluids from healthy subjects and patients with osteoarthritis (OA). The results are expressed as picograms per milligram of proteins and are the mean ± standard error of the mean of 7 healthy subjects and 11 OA patients. *P < 0.05 versus healthy subjects.