广藿香胃肠道药理作用

本实验探讨了广藿香3种不同提取物对胃肠道作用的差异。结果表明,水提物、去油水提物和发挥油均可抑制离体免肠的自发收缩和乙酰胆碱及氯化钡引起的痉挛性收缩,以挥发油的抑制作用最强。在整体实验中,水提物和去油水提物均减慢胃排空,抑制正常小鼠和新斯的明引起的小鼠肠推进运动,增加胃酸分泌,提高胃蛋白酶活性,促进胰腺分泌淀粉酶,提高血清淀粉酶活力,而挥发油则对胃排空和肠推进运动无影响,并使胃酸分泌减少,提高胃蛋白酶活性的作用比水提物和去油水提物均弱。水提物、去油水提物均能减少番泻叶引起的腹泻次数,而挥发油则协同番泻叶引起小鼠腹泻。此外,水提物、去油水提物和挥发油均可抑制冰醋酸引起的内脏绞痛,其中水提物的作用较强。以上结果提示,广藿香的有效成分主要是水溶性成分。

Effects of Herba Pogostemonis on Gastrointestinal Tract

The effects of the three extracts (Decoction, oil-free decoction and volatile oil) of Herba Pogostemonis on gastrointestinal tract were studied. The results showed that all the three extracts inhibited the automatic contraction and Ach, BaCl2-induced spasmodic contraction of isolated rabbit intestine, among the three extracts the volatile oil was the most potent. In vivo the decoction and the oil-free decoction could depress gastric evacuation and inhibit the normal and neostigmine-induced intestinal propellent movement in mice, but the volatile oil could not. The decoction and the oil-free decoction also increased gastric secretion of acid and activity of pepsin and amylase. Furthermore, the decoction and the oil-free decoction reduced the incidence of diarrhea induced by senna but volatile oil enhanced cooperatively. All the three extracts relieved the gripping pain induced by abdominal administration of acetic acid, and the effect of decoction was more potent that the others. The above results revealed that the effective components of Herba Pogostemonis may be mainly water-solube.