Fig. 3.
Production of the metalloproteases (A) MMP-1, (B) MMP-9, and (C) MMP-13, and (D) the pro-inflammatory cytokine IL-6 following specific PAR-2 activation. OA subchondral bone osteoblasts (n=9–12) were incubated for 72 h in the absence (Control) or presence of PAR-2-AP at 100 and 400 μM. Data are expressed as fold of control in which the control was assigned a value of 1. P values indicate the comparison with the untreated (Control) cells using the paired Student’s t-test.