Abstract
The plants that compound the Pfaffia genus are used in folk medicine to treat gastric disturbances. This study examined the effects of a crude hydroalcoholic extract of Pfaffia sp on the gastrointestinal tract. Female Wistar rats were pretreated orally (p.o.) with the hydroalcoholic extract of Pfaffia (0.5, 1 and 2 g.kg-1) before the induction of ulcer with hypothermic restraint stress (HRS), ethanol (ET) or indomethacin (IND). Control animals received water (C) or ranitidine (60mg/kg) p.o. The hydroalcoholic extract of Pfaffia (0.5, 1 and 2 mg.kg-1) protected rats against HRS and ET - induced ulcers, but was not able to protect the gastric mucosa against IND - induced ulcers. When injected into the duodenal lumen, the hydroalcoholic extract of Pfaffia inhibited basal and stimulated acid secretion in pylorus-ligated rats. These results indicate that this plant has a protective action against gastric lesions of the mucosa involving the reduction of gastric acid secretion.
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