Mechanism of hypothalamic effect in small intestine electro-activity of rats regulated by fructus aurantii immaturus / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of Fructus Aurantii Immaturus (FAI) on the electro-activity of small intestines in rats, and evaluate the interrelations between the FAI regulating effect and choecystokinin (CCK) and somatostatin (SS).</p><p><b>METHODS</b>Migrating myoelectric complex (MMC) cyclic period, the ratio of the active time to the cyclic period, and the number of the fast wave within the active time per minute were observed between FAI and the normal saline group by external alimentary canal electrodes; the CCK contents in dorsomedial hypothalamic nucleus (DMH), ventromedia hypothalamic nucleus (VMH), lateral hypothalamus area (LHA) and SS in VMH, LHA, paraventricular nucleus (PVN) by using immuno-chemistry technique and micro-image pattern quantitative analysis and scanning system.</p><p><b>RESULTS</b>The MMC cyclic period shortened, the ratio of the active time to the cyclic period increased and the number of the fast wave within the active time per minute increased in the FAI group, which showed significant difference from the normal saline group; CCK positive neurons were reduced in the areas of DMH, VMH and LHA, SS positive neurons were increased in the areas of VMH, LHA and PVN in the FAI gioup,which showed significant difference compared with the normal saline and the blank control group.</p><p><b>CONCLUSION</b>FAI can stimulate the electro-reactivity of small intestines. The stimulative effect of FAI might be related to CCK and SS in hypothamus.</p>

Experimental study on the effect of Glycyrrhiza on small intestinal motility in rats / 中国应用生理学杂志

<p><b>AIM</b>To investigate the effects of glycyrrhiza decoction on migrating myoelectric complex (MMC) and gastrointestinal hormone in small intestine in rats.</p><p><b>METHODS</b>We observed MMC cycle,phase Ill duration,fast wave numbers of phase III of MMC in one minute, fast wave numbers of one cluster in phase III of MMC of small intestine of glycyrrhiza group and control group rats with electrophysiology method, and immunohistochemistry to examine relative content of serotonin (5-HT), substance p(SP) and vasoactive intestinal polypeptide (VIP) in small intestinal chromophil (EC) and myenteric nerve plexus in small intestine of control group and glycyrrhiza group rats.</p><p><b>RESULTS</b>Compared glycyrrhiza group with control group,we found that glycyrrhiza was able to decrease fast wave numbers in one minute and fast wave numbers in one cluster in phase III of MMC of small intestine (P < 0.05), and evidently extend small intestinal cycle of MMC (P < 0.05), it also shortened the phase III III duration (P < 0.05) or made the phase III of MMC absent. Compared glycyrrhiza group with control group it was indicated that content of 5-HT in small intestinal mucous membrane and myenteric nerve plexus was evidently decreased (P < 0.05), and content of SP in myenteric nerve plexus of small intestine of rats was evidently decreased (P < 0.05), and content of VIP in small intestine of rats was evidently increased (P < 0.05).</p><p><b>CONCLUSION</b>Glycyrrhiza is able to inhibit small intestinal motility, this inhibition is related with the amount of 5-HT, SP, VIP secreted by small intestinal mucous membrane of rats.</p>