Résumé
OBJECTIVE:To study the protective effect of Weidean tablets on rats with stress-induced gastric ulceration. METH-ODS:Water immersion restraint stress method and empty stomach were employed to establish rat models with gastric ulceration. 60 SD rats were equally randomized into normal control group(isometric sodium chloride injection),model group(isometric sodium chloride injection),ranitidine group(0.015 g/kg),and groups of high,medium and low doses(1.70,0.87 and 0.43 g/kg)of Wei-dean tablets. General situation of stomach was observed .The gastric mucosal injury index,the NO content in serum,and the activi-ties of SOD and iNOS and the contents of MDA and PGE2 in the gastric tissue were detected for rats. Pathomorphological observa-tion of rats’gastric tissues was conducted under the microscope. RESULTS:Compared with normal control group,the rats in the model group had higher gastric mucosal injury index,lower content of NO in serum,and weaker activity of SOD,stronger activity of iNOS,higher content of MDA and PGE2,in the gastric tissue. There was statistical significance (P<0.01 or P<0.05). Dark matter,severe deformation and necrosis of gastric mucosal cells in rats were noted,as well as multiple large-area superficial ulcers. Compared with the model group,the rats in groups of high,medium and low doses of Weidean tablets had lower gastric mucosal injury index,higher content of NO in serum,and stronger activity of SOD,weaker activity of iNOS,lower content of MDA and higher content of PGE2,in the gastric tissue. There was statistical significance(P<0.01 or P<0.05). General situation of stomach and the pathomorphological condition of rats’gastric tissues were improved. CONCLUSIONS:Weidean tablets has protective ef-fect to some extent on rats with stress-induced gastric ulceration,the mechanism is related to the improvement of serum levels of anti-oxidation index in rats.