Direct effects of nitric oxide on histamine release from rat enterochromaffin-like cells

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• 作者：Naozumi Shibata ; Hidetaka Matsui ; Tomoyuki Yokota ; Bunzo Matsuura ; Kazutaka Maeyama and Morikazu Onji
• 关键词：Gastric acid secretion ; NO (nitric oxide) donor ; Gastrin
• 刊名：European Journal of Pharmacology
• 出版年：2006
• 出版时间：27 March 2006
• 年：2006
• 卷：535
• 期：1-3
• 页码：25-33
• 全文大小：233 K

文摘

The direct effects of nitric oxide (NO) on enterochromaffin-like (ECL) cells have not yet been demonstrated. In this study we investigated the direct effects of NO donors on rat ECL cells. The NO donor, NOR3 (10 and 100 μM), decreased gastrin-induced histamine release. 100 μM NOR3 increased cGMP levels and reduced gastrin-induced calcium influx. ODQ, an inhibitor of guanylate cyclase, completely blocked NOR3-induced inhibition of histamine release. These results suggest that NO inhibits gastric acid secretion via suppression of gastrin-induced histamine release through a pathway in which NO activates guanylate cyclase, in addition to increasing cGMP levels and reducing gastrin-induced calcium influx. The use of NO as a new type of gastric acid inhibitor that decreases histamine levels in the stomach would be beneficial as increased histamine levels resulting from use of a histamine H₂ receptor antagonist or proton pump inhibitor have various effects on tumors and immunological functions.