甘草酸铋抗实验性胃溃疡作用及机制研究

目的：研究甘草酸铋抗实验性胃溃疡的作用及其作用机制。方法：以SD大鼠和昆明种小鼠为研究对象,复制3种实验性胃溃疡动物模型(大鼠幽门结扎致胃溃疡模型、大鼠乙醇致胃溃疡模型和小鼠束缚水浸应激致胃溃疡模型)。将大鼠分成甘草酸铋700,350,175 mg·kg^-1剂量组、甲氰咪胍(200 mg·kg^-1)阳性对照组和0.1%EDTA空白对照组；小鼠分成甘草酸铋980,490,250 mg·kg^-1剂量组。测定胃黏膜损伤指数、胃液分泌量,胃液酸度,血清中一氧化氮(NO)含量,胃组织前列腺素(PGE₂)相对含量；结果：与模型对照组比较,甘草酸铋能使胃液量、胃酸浓度 、胃黏膜损伤指数减少(或降低)；血清NO含量和胃组织前列腺素含量增加。结论：甘草酸铋对实验性胃溃疡具有一定疗效,其作用机制可能与抑制胃酸分泌、改善胃黏膜微循环有关。

Effect of bismuth glycyrrhizate on experimental gastric ulcers and its mechanisms

Objective: To investigate the ulcer-preventive effect of bismuth glycyrrhizate on experimental gastric ulcer and its mechanisms. Method: Three kinds of model animals with experimental gastric ulcer were established and gastric mucosal injuries were induced by pyloric ligation in rats, applying ethanol in rats and imposing stress in mice, respectively. The rats were divided into experimental groups treated with bismuth glycyrrhizat 700, 350, 175 mg·kg^-1, positive control group treated with cimetidine (200 mg·kg^-1), and negative control group treated with 0.1% EDTA. The mice were divided into experimental groups treated with bismuth glycyrrhiza 980, 490, 250 mg·kg^-1. The gastric ulcer index, gastric juice volume, acidity, pepsin activity, the level of nitric oxide (NO) in serum and the level of prostaglandin E₂ in gastric tissue were measured in rats. Result: Bismuth glycyrrhizate was shown to be able to reduce the gastric juice volume, acidity and pepsin activity as well as gastric ulcer index. It could increase the content of NO in serum and the content of prostaglandin E₂ in gastric tissue. Conclusion: The bismuth glycyrrhizate has antiulcer effect in rats.