PURPOSE: In Vivo and In vitro antispasmodic effects of JungRiTang II, a Traditional Korean Polyherbal Medicine were observed in the present study. To clarify the effects of JungRiTang II, on accelerating small intestinal movement induced by the stimul...
PURPOSE: In Vivo and In vitro antispasmodic effects of JungRiTang II, a Traditional Korean Polyherbal Medicine were observed in the present study. To clarify the effects of JungRiTang II, on accelerating small intestinal movement induced by the stimulation of cholinergic neurotransmission, we evaluated the effects of JungRiTang II on In vivo carbachol (an acetylcholinergic agent)-accelerated mice small intestinal transit and on In vitro contractions induced by low-frequency electrostimulation, KCl, histamine or acetylcholine using isolated guinea pig ileum.
METHODS: To induce the acceleration of mice small intestinal transit, Carbachol 1mg/kg was once subcutaneously dosed 15min before last administration of the test drugs. In the present study, aqueous extracts of JungRiTang II 500, 250 and 125mg/kg or domperidone 20mg/kg were orally pretreated on the carbachol-accelerated mice small intestinal transit once a day for 7 days and the small intestinal transit rats of activated charcoal powder were monitored. In vitro assays, JungRiTang II 1, 0.1, 0.01 and 0.001mg/ml or domperidone 2×10^(-5)M were treated 10min before ileal contraction was induced by filed stimulation, acetylcholine, KCl and histamine, and the % changes of contractions were observed compared to the treatment of inducer alone. In spontaneous contraction, the % changes of contractions were observed compared to treatment of vehicle alone at 10min after JungRiTang II or domperidone treatment. The efficacy of JungRiTang II were compared to those of domperidone.
RESULTS: High concentration, 1mg/ml of JungRiTang II extract was found to increase the spontaneous contraction of the isolated guinea-pig ileum. However, the JungRiTang II extracts decrease contractions induced by electrostimulation, acetylcholine, histamine and KCl in the isolated guinea-pig ileum. In addition, JungRiTang II extracts effectively inhibited the accelerated small intestinal movement induced by carbachol stimulation of cholinergic neurotransmission in In vivo.
CONCLUSION: Based on the results, although the exact molecular mechanism and which herbs or compound in JungRiTang II are responsible for actions, it was concluded that JungRiTang II enhancement in the normal intestinal motility; and normalization in the accelerated intestinal motility might be interfere with a variety of muscarinic, adrenergic and histaminic receptor activities or with the mobilization of calcium ions required for smooth muscle contraction non-specificly. Therefore, it is expected that JungRiTang II will be promising as a prescription of clinical treatment of digestive tract disorders not only constipation but also the pain relief of IBS and ileus.