Effects of a New Benzimidazole Derivative, NC-1300-O-3, on gastric Secretion and Gastroduodenal Lesions in Rats.
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概要
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We examined the effects of a new compound, NC-1300-0-3 {2-[2-N-methyl -N-(2-methylpropyl) amino] benzylsulfinyl benzimidazole}, on the gastric mucosal proton pump (H<SUP>+</SUP>, K<SUP>+</SUP>-ATPase) activity, gastric secretion and gastroduodenal lesions in rats. The compound potently inhibited the enzyme activity in a concentration-dependent manner, the IC<SUB>50</SUB> being 5.3 × 10<SUP>-6</SUP> M at pH 6.0 and 1.4 × 10<SUP>-5</SUP> M at pH 7.4. NC-1300-0-3 markedly and persistently (for more than 24 hr) inhibited basal gastric secretion in male or female animals when administered by the p.o. route. The compound also significantly inhibited gastric secretion by the intraduodenal (i.d.), intragastric (after pylorus ligation) and i.p. routes, but only weakly by the s.c. route. Repeated p.o. administration of the compound for 1 week also significantly inhibited gastric secretion. Histamine-stimulated gastric secretion was also significantly inhibited by the i.d. administration of the compound. NC-1300-0-3, administered p.o., potently prevented water-immersion stress-, histamine-, indomethacin-, prednisolone and compound 48/80-induced gastric lesions. In addition, it also significantly prevented the formation of gastric lesions induced by various necrotizing agents. Mepirizole and cysteamine-induced duodenal ulcers were also prevented by the compound. The antisecretory and antilesion activities of NC-1300-0-3, administered p.o., were not altered on its combination with 2% NaHCO<SUB>3</SUB>.
- 公益社団法人 日本薬理学会の論文
著者
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Okabe Susumu
Department Of Applied Pharmacology Kyoto College Of Pharmacy
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Kuwahara Kayoko
Department of Applied Pharmacology, Kyoto Pharmaceutical University
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Akimoto Yasushi
Department of Applied Pharmacology, Kyoto Pharmaceutical University
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Yamasaki Shinichi
Department of Applied Pharmacology, Kyoto Pharmaceutical University
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