Research Article

Ameliorative Effects of Humulus japonicus Extract and Polysaccharide-Rich Extract of Phragmites rhizoma in Rats with Gastrointestinal Dysfunctions Induced by Water Avoidance Stress

Figure 5

Effect of HJE and PEP on acetylcholine- and serotonin-induced colonic contractility in WAS rats. The effect of 10-day pretreatment with 5 mg/kg of loperamide and 0.25 and 0.5 ml/kg of HJE and PEP on acetylcholine-induced (a) and serotonin-induced (c) motility in WAS rats. The effect of loperamide (10 μM) and HJE and PEP (1 and 5 μL/ml; extract was added to the tissue organ bath 15 min before stimulation) on acetylcholine-induced (b) and serotonin-induced (d) colonic contractility in WAS rats. versus normal groups; and versus WAS group. Data were expressed as means ± SEM (n = 8).
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