effect of hydro-alcoholic extract of persian oak (quercus brantii) in experimentally gastric ulcer

persian oak (quercus brantii lindl., the fagaceae family) is a medicinal plant which seed flour is used to treat inflammatory and gastric ulcers by the tribes in southwestern iran. the current study was done to evaluate the effect of hydro-alcoholic extract of q. brantii seed flour for treatment of gastric ulcers induced by ethanol in wistar rats. the hydro-alcoholic extract of q. brantii was tested orally at doses of 250, 500, and 1000 mg/kg, control group and standard drug (omperazole) on experimentally gastric ulceration. at the 3, 6, 9, and 14th days, ulcer index in mm2 and histopathological findings were evaluated. results indicated the size of ulcers significantly reduced at 9, and 14 days after of q. brantii extract treatment. curative effect in the hydro-alcoholic induced gastric damage was 100% at 1000 mg/kg and omeprazole, 99.8 % at 500 mg/kg, and 95.4% at 250 mg/kg after 14 days. results of histopathological investigation showed the thickness of ulcerated mucosa was similar to the normal mucosa with 1000 mg/kg of q. brantii hydro-alcoholic extract after 14 days but in the groups treated by 250, and 500 mg/kg, superficial erosions were visible in the central portion of the healed ulcers. in conclusion, the hydro-alcoholic extract of q. brantii had active components (tannin = 8.2%) that accelerates ulcer healing and thus supported its traditional use.