Effect of a new antiulcer drug, leminoprazole, on the gastric mucosal H+, K+-ATPase activity in rats.
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- MATSUKURA Hitoshi
- Research Laboratories, Nippon Chemiphar Co., Ltd.
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- MASUDA Makoto
- Research Laboratories, Nippon Chemiphar Co., Ltd.
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- UCHIDA Aoi
- Research Laboratories, Nippon Chemiphar Co., Ltd.
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- KAMISHIRO Toshiro
- Research Laboratories, Nippon Chemiphar Co., Ltd.
Bibliographic Information
- Other Title
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- 新規抗潰よう剤レミノプラゾールのラット胃粘膜H`+´,K`+´‐ATPase阻害作用の検討
- シンキ コウ カイヨウザイ レミノプラゾール ノ ラット イ ネンマク H +
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Description
The inhibitory action of leminoprazole on the activity of rat gastric mucosal H+, K+-ATPase was investigated in vitro and ex vivo. Leminoprazole and omeprazole concentration-dependently inhibited the H+, K+-ATPase activity, and their IC50 values were 31 μM and 24 μM, respectively, at pH7.4. Leminoprazole dose-dependently inhibited the H+, K+-ATPase activity at 3 and 6 hr after the administration at 10-100 mg/kg, p.o. Leminoprazole (60 mg/kg, p.o.) inhibited the H+, K+-ATPase activity persistently, and the duration of its inhibitory action was much longer than that of omeprazole (30 mg/kg, p.o.). In pylorus-ligated rats, good correlations between the respective inhibitory rates against gastric acid output and H+, K+-ATPase activity was found after the administration of leminoprazole. These results suggest that leminoprazole inhibits the gastric acid secretion by its ability to inhibit the H+, K+-ATPase activity in rats; its inhibitory activity was comparable to that of omeprazole. In addition, leminoprazole (100 mg/kg) inhibited the H+, K+-ATPase activity even when administered intragastrically after pylorus-ligation, suggesting that this drug can inhibit H+, K+-ATPase activity directly from the gastric lumen. Moreover, leminoprazole (100 mg/kg, p.o.) when administered repeatedly for 2 or 4 weeks inhibited the H+, K+-ATPase activity to the same degree as the single administration.
Journal
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- Folia Pharmacologica Japonica
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Folia Pharmacologica Japonica 104 (2), 91-100, 1994
The Japanese Pharmacological Society
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Keywords
Details 詳細情報について
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- CRID
- 1390282679247961984
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- NII Article ID
- 130000759700
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- NII Book ID
- AN00198335
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- ISSN
- 13478397
- 00155691
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- NDL BIB ID
- 3898544
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- PubMed
- 7927073
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed