ABSTRACT
Objective To evaluate the protective effects of hydrotalcite,Marzulene-s,selbex,gefarnate,sucralfate and rebamipide against the gastric mucosa lesions induced by ethanol,aspirin,hydrochloric acid or prednisolone in rats.The changes in intercellular space width of gastric epithelial in rats was observed. Methods Four kinds of models were used to observe the protective effects of six agents against the gastric mucosal lesions.① Ethanol model:a total of 84 male Wistar rats were divided into 7 groups with 12 each. The rats in group 1 to 7 were orally received hydrotalcite,Marzulene-S,gefarnate,sucralfate,rebamipide or normal saline for 3 days,respectively.On day 4,the rats were given 1 ml of absolute ethanol.The length of gastric lesion were measured by ulcer index.② Aspirin model:the rats were received 300 mg/kg of aspirin and 0.1 mol/L hydrochloric acid (0.5 ml/100 g).The following procedures were as ①.③ Hydrochloric acid model:the rats were received 1 ml of 0.7 mol/L hydrochloric acid. The following procedures were as ①. ④ Prednisolone model: all groups were administrated with above 6 agents or normal saline for 5 days.During the 2nd-5th day,the rats were subcu aneously injected with prednisolone (250 mg/kg) daily. Rats were killed on 5th day,and the lesions were mcasured by ulcer index.Gastric mucosal tissue of No.1,5 and ]0 rat in the control group and the hydrotalcite group were picked up to measure the intercellular space width using transmission electron microscopy. Results In four kind of models,the ulcer index were significantly lower in rats treated with mucosal protective agents than that in the controls (P＜0.05),expecially in hydrotalcite group (P＜0.01).The width of intercellular space in the hydrotalcite group was significantly narrower than that in controls (P＜0.05).Conclusions All of the mucosal protective agents can be against the gastric mucosal lesion induced by ethanol,hydrochloric acid,aspirin or prednisolone.Among them,the hydrotalcite is even better.The effect of hydrotalcite is further confirmed by observation of intercellular space width.