Involvement of Potassium Channels in Vasorelaxant Effect Induced by Valeriana prionophylla Standl. in Rat Mesenteric Artery
Figure 1
Vasorelaxant effect induced by VPR. Concentration-response curves to VPR or VPF (0.01–300 μg/mL, cumulatively) precontracted with 1 μM phenylephrine (Phe) in mesenteric artery rings (with endothelium) and after removal of endothelium: (a) concentration-response curves showing the relaxant effect of VPR, ; (b) responses induced by VPF, . The response is expressed as a percentage relaxation of the Phe-induced contraction. Values are mean ± SEM.