Hydrogen sulfide-induced enhancement of gastric fundus smooth muscle tone is mediated by voltage-dependent potassium and calcium channels in mice

Figure 2 Effect of H₂S on the tension of gastric smooth muscle. A: Different doses of NaHS significantly enhanced the gastric fundus smooth muscle tension (a: Representative trace of changes in gastric fundus smooth muscle tension induced by different concentrations of NaHS; b: Summarized graph showing the effects of different concentrations of NaHS in inducing basal tension); B: Effects of endogenous H₂S on the gastric fundus smooth muscle tension (a: Representative traces of AOAA- and L-NAME-induced basal tension; b: Summarized graph showing the changes in AOAA and L-NAME-induced tonic contraction). Data are expressed as mean ± SE, n = 10, ^aP < 0.05, vs the control. AOAA: Aminooxyacetic acid; L-NAME: Nω-nitro-L-arginine methyl.