Fig. 4

Interactive effects of EEP with acetylcholine, methylene blue or indomethacin on the contractile response of colonic smooth muscle. Relative tension of colonic smooth muscle contraction was measured after pre-treatment with acetylcholine (A), indomethacin (B) or methylene blue (C), and subsequent treatment with EEP. Spontaneous:spontaneous contraction; Ach: acetylcholine. * P < 0.05, **P < 0.01, data (mean ± SEM) were analyzed by ANOVA