Figure 1: Influence of periostin stimulation on nitric oxide (NO) production from HFLS-OA in vitro. Human synoviocytes from an OA patient (HFLS-OA) at 1x 105 cells/ml were cultured with different concentrations of periostin for 24 h. Concentration of NO in culture supernatants was measured by the Griees method and the results were expressed as the mean μMol/ml ± SE of triplicate cultures. One representative experiment of two.

figure 1