In RAVSMC and RAW 264.7 cells, YS-49 (1-100?μM; 18 hours; ) concentration-dependently inhibits the accumulation of nitrite in both RAVSMC and RAW 264.7 exposed to lipopolysaccharide (LPS) plus INF-γ, with IC50 values of 22 μM and 30?μM, respectively[2].At the transcriptional level, YS-49 (10-100?μM; 18 hours; RAVSMC and RAW 264.7 cells) suppresses iNOS gene expression induced by LPS and/or cytokines in RAVSMC and RAW 264.7 cells [2].

In male Sprague Dawley rats,YS-49 (5?mg/kg; intraperitoneal injection; 8 hours; ) treatment significantly reduces serum NOx levels in LPS-treated rats, the NOx levels reduce from 86 μM to 34 μM[2].