Thirty-two 8 weeks old male C57BL/6 mice were used in this study. Eight mice were randomly allocated to the sham surgery group. After anesthetized by intraperitoneal injection of pentobarbital (35 mg/kg), sham surgery group were subjected to sham surgery. Then, destabilized medial meniscus (DMM) were performed to establish the OA model in twenty-four mice. DMM mice were randomly divided into three groups (N=8 for each group): the DMM group, the DMM+0.1mg/kg ferrostain-1 group and the DMM+1mg/kg ferrostain-1 group. The DMM+0.1 mg/kg ferrostain-1 group and the DMM+1mg/kg ferrostain-1 group were intraarticularly injected with 0.1 mg/kg or 1 mg/kg ferrostain-1 respectively. The sham surgery group and DMM group were intraarticularly injected with same volume of vehicle. The injection was repeated twice a week for 8 consecutive weeks.

The male C57BL/6 mice were divided randomly into 4 groups (n = 4 per group, 8-10 weeks old, weight = 23-25 g): the control group receiving 0.9% NaCl (containing 0.1% DMSO), the LPS group receiving LPS plus 0.9% NaCl (containing 0.1% DMSO), the Fer-1 group receiving Fer-1 only, and the LPS + Fer-1 group receiving both Fer-1 and LPS. The LPS-induced ALI model was induced by instilling intratracheally 50 ul of LPS solution (0.2 g/L), then Fer-1 (0.8 mg/kg) was administered after LPS challenge via tail vein injection. The Fer-1 was dissolved in DMSO first, and diluted with 0.9% NaCl. The final concentration of Fer-1 and DMSO was 0.2 mg/ml and 0.1% respectively.

The male C57BL/6 mice were divided randomly into 4 groups (n = 4 per group, 8-10 weeks old, weight = 23-25 g): the control group receiving 0.9% NaCl (containing 0.1% DMSO), the LPS group receiving LPS plus 0.9% NaCl (containing 0.1% DMSO), the Fer-1 group receiving Fer-1 only, and the LPS + Fer-1 group receiving both Fer-1 and LPS. The LPS-induced ALI model was induced by instilling intratracheally 50 ul of LPS solution (0.2 g/L), then Fer-1 (0.8 mg/kg) was administered after LPS challenge via tail vein injection. The Fer-1 was dissolved in DMSO first, and diluted with 0.9% NaCl. The final concentration of Fer-1 and DMSO was 0.2 mg/ml and 0.1% respectively.