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High quality of ulcer healing in rats by lafutidine, a new-type histamine H2-receptor antagonist: involvement of capsaicin-sensitive sensory neurons

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image of Inflammopharmacology

This study was conducted to determine whether the low recurrence rate of ulcers after treatment with lafutidine, an antiulcer drug possessing both an antisecretory and gastroprotective activities, was mediated by capsaicin-sensitive sensory neurons (CSSN). Chronic gastric ulcers in rats were induced by serosa-searing. The ulcer healing and recurrence were evaluated by endoscopy. Drugs were orally administered. Desensitization of CSSN was induced by pretreatment with capsaicin. Lafutidine (30 mg/kg) accelerated the ulcer healing significantly, and the recurrence rate was much lower than that for the vehicular control. In CSSN-desensitized rats, lafutidine also accelerated the ulcer healing significantly, but the low recurrence rate shown in normal rats was counteracted. The recurrence rate of the combination of famotidine (30 mg/kg) and teprenone (100 mg/kg) was lower than that of famotidine alone. In conclusion, the low recurrence rate of ulcers after lafutidine treatment in rats seems to depend on the gastroprotective mechanisms involving CSSN.


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