[Effects of heishunpian total alkaloids on Cassia acutifolia induced mice diarrhea and contraction of isolated intestinal smooth muscle in rats].

OBJECTIVE: To observe the effects of Heishunpian total alkaloids on Cassia acutifolia induced mice diarrhea and contraction of isolated intestinal smooth muscle in rats. METHODS: The experiment was carried out with Cassia acutifolia induced mice diarrhea model, small intestinal propulsive rate in mice was used to valuate the effect of Heishunpian total alkaloids on diarrhea mice; The effects of Heishunpian total alkaloids on contraction of isolated intestinal smooth muscle in rats and its mechanism were investigated by monitoring amplitude and tension of isolated intestinal smooth muscle in rats; The chemical constituents of Heishunpian total alkaloids were analyzed by HPLC. RESULTS: Heishunpian total alkaloids could significantly slow down intestine propulsive motility in diarrhea mice (P < 0. 05), and reduce amplitude and tension of isolated small intestinal smooth muscle contraction in normal rats in dose-dependent manner. Heishunpian total alkaloids had a certain inhibitory effect on acetylcholine chloride and neostigmine methylsulfate strengthening small intestine smooth muscle movement, however, had no significantly effect on Atropine sulfate inhibiting small intestine smooth muscle movement. By HPLC analysis, benzoylaconitine, benzoylmesaconitine, benzoylhypaconitine were the main chemical constituents of Heishunpian total alkaloids. CONCLUSION: Heishunpian total alkaloids have a certain role of antidiarrheal and its mechanism may be related to antagonizing muscarinic receptors.