Figure 4. Effects of taurine on the contractile amplitude of isolated jejunal segments pretreated with receptor antagonists. A, Representative traces and statistical analysis (n=6) of taurine-induced effects on the contractile amplitude of isolated jejunal segments pretreated with 1 μM atropine, 10 μM diphenhydramine, and 10 μM cimetidine in low contractile states (LCS) induced by low Ca²⁺ (1.25 mM) Krebs buffer. B, Representative traces and statistical analysis (n=6) of taurine-induced effects on the contractile amplitude of isolated jejunal segments pretreated with 1 μM phentolamine, 1 μM propranolol, and 300 μM L-NNA in high contractile states (HCS) induced by high Ca²⁺ (5.0 mM) Krebs buffer. The contractile amplitude in the normal contractile state (NCS, control) is set to 100%; other data are the relative values compared with NCS. *P<0.05 vs the contractile amplitude in NCS; ^#P<0.05 vs the contractile amplitude in LCS or HCS before taurine administration (one-way ANOVA).