Effect of teprenone on acute gastric mucosal lesions induced by cold-restraint stress.

The effects of intragastric administration of teprenone on acute gastric mucosal lesions induced by cold-restraint stress was investigated using a model of obstructive jaundice. Rats received teprenone 200 mg/kg/day for a week before stress; nontreated rats served as controls. Teprenone suppressed stress-induced depressions in defensive factors (blood flow, transmucosal potential difference, hexosamine content and lectin staining of carbohydrate residues) and suppressed increases in lesion-enhancing factors (gastric mucosal lysosomal enzyme activity and thiobarbituric acid reactants showing lipid peroxidation). Intragastric pH did not change significantly with teprenone but the ulcer index decreased. These results showed that teprenone protects gastric mucosa against stress, even in the presence of obstructive jaundice.