Effects of Charred Fructus Crataegi on the contractilily of isolated rat gastric and intestine muscle strips

Objective The purpose of the study is to investigate the effects of Charred Fructus Crataegi Alcohol Extract on contractililty of isolated rat gastric and intesting smooth muscle strips.Methods Isolated rat intestine was selected in the assay to test the effects of Charred Fructus Crataegi Alcohol Extract on contractilty of isolated rat gastric and intestine smooth muscle strips using Krebs' solution,to observe the effects of in the presence of acetylcholine or atropine.Results Charred Fructus Crataegi Alcohol Extract in the range of 2-8 mg crude drugs/mL could significantly reduce the contractility of rat gastric and intestine smooth muscle strips in a dose-dependent manner,and Charred Fructus Crataegi Alcohol Extract 8 mg·mL-1(crude drugs)could inhibit the stimulation induced by acetylcholine.Charred Fructus Crataegi Alcohol Extract 8 mg·mL-1(crude drugs)was found to have a inhibiton of the relaxtion concurrently used with atropin.Conclusions The results suggest that Charred Fructus Crataegi Alcohol Extract has prominent inhibitory effects on the contractile activity of isolated rat gastric and intestine smooth muscle strips.