Nitric oxide modulates pancreatic edema formation in rat caerulein-induced pancreatitis

Takashi Abe, Tooru Shimosegawa, Akihiko Satoh, Reishi Abe, Yoshifumi Kikuchi, Masaru Koizumi, Takayoshi Toyota

研究成果: Article査読

26 被引用数 (Scopus)

抄録

This study was designed to investigate the role of nitric oxide (NO) in the formation of pancreatic edema in caerulein-induced pancreatitis in rats. Pancreatitis was produced by two intraperitoneal injections of caerulein, and plasma amylase concentration, pancreatic edema index (pancreatic wet weight/body weight), and Evans blue extravasation (as a measure of vascular permeability) were evaluated 5h after the first injection. Four doses (1, 2.5, 5, and 10 mg/kg) of NG-nitro-L-arginine (l-NNA), an NO synthase inhibitor, were subcutaneously administered at -0.5, 0.5, 1.5, 2.5, and 3.5h after the first injection of caerulein. l-NNA significantly lowered the edema index, the wet/dry weight ratio of the pancreas, and Evans blue extravasation in the rats with pancreatitis. The maximal effect was obtained by l-NNA at a dose of 2.5 mg/kg; this inhibited the increase in pancreatic edema formation from the control value by 60%-70%. Intraperitoneal injections (20 mg/kg, five times) of l-arginine, a substrate for NO production, partly reversed the l-NNA-induced inhibition of pancreatic edema formation, but d-arginine, an enantiomer of l-arginine, did not show any effect. Plasma amylase concentrations were not significantly affected by any dose of L-NNA, nor were they affected by l- or d-arginine. These findings strongly suggest that endogenous NO plays an important role in the formation of pancreatic edema in caerulein-induced pancreatitis in rats, probably by increasing vascular permeability and protein extravasation.

本文言語English
ページ(範囲)636-642
ページ数7
ジャーナルJournal of gastroenterology
30
5
DOI
出版ステータスPublished - 1995 10 1

ASJC Scopus subject areas

  • Gastroenterology

フィンガープリント 「Nitric oxide modulates pancreatic edema formation in rat caerulein-induced pancreatitis」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル