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  • Title: Factors influencing Helicobacter pylori eradication with 2 week combination therapy of lansoprazole and amoxycillin: intragastric distribution of colonization and gastric mucosal atrophy.
    Author: Saita H, Murakami M, Takahashi Y, Sou Y, Kaitani K, Nishio K, Kita T.
    Journal: J Gastroenterol Hepatol; 1998 Jul; 13(7):725-31. PubMed ID: 9715425.
    Abstract:
    In Japan, gastric ulcers are often accompanied by marked gastric mucosal atrophy. We evaluated the dual therapy of double-dose lansoprazole and amoxycillin for Helicobacter pylori eradication in Japanese ulcer patients and investigated the effects of intragastric distribution of H. pylori colonization and gastric mucosal atrophy on eradication with this combination therapy. Seventy-six H. pylori-positive ulcer patients received lansoprazole (30 mg) plus amoxycillin (500 mg) twice daily for 2 weeks (LA-60 group), lansoprazole (30 mg once daily) plus amoxycillin (500 mg twice daily) for 2 weeks (LA-30 group) or lansoprazole (30 mg once daily) for 6 or 8 weeks (LPZ group). Infection was evaluated by light microscopy, culture and biopsy urease tests. Helicobacter pylori colonization was classified as localized to the corpus (localized type) or involving the antrum and corpus (whole type). Fundic mucosal atrophy was graded according to endoscopic and histological features. Eradication was achieved in 67.6% in the LA-60 group, 31.6% in the LA-30 group, and 0% in the LPZ group, and moderate or severe histological gastritis was improved in the LA-60 group. Eradication was better in localized-type colonization (92%) than whole-type (56%), and better with fundic mucosal atrophy (84%) than without, but poor in both whole-type colonization and scanty mucosal atrophy (47%). The LA-60 therapy achieves better eradication in Japanese ulcer patients with localized H. pylori colonization and/or gastric mucosal atrophy, which are likely to be important predictors for the successful eradication with dual therapy.
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