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N-(3-(Aminomethyl)benzyl)acetamidine, an inducible nitric oxide synthase inhibitor, decreases colonic inflammation induced by trinitrobenzene sulphonic acid in rats

机译:N-(3-(氨基甲基)苄基)乙am,一种可诱导的一氧化氮合酶抑制剂,减少三硝基苯磺酸诱导的大鼠结肠炎症

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摘要

Gastrointestinal inflammation has been associated with an increased generation of nitric oxide (NO) and the expression of the inducible NO synthase (iNOS). Using an experimental model of colitis induced by trinitrobenzene sulphonic acid (TNBS),we sought to determine whether the administration of N-(3-(Aminomethyl)benzyl)acetamidine (1400W), a specific inhibitor of iNOS,has a beneficial action on the colonic injury. 1400W (0.4 and 2 mg/kg/day) was administered intraperitoneally from day 5 to 10 after intrarectal instillation of TNBS. TNBS led to colonic ulceration and inflammation, an increase of colonic myeloperoxidase activity and the expression of the calcium-independent NOS from days 1 to 15. 1400W reduced the macroscopic damage and the histological changes induced by TNBS as well as the calcium-independent NOS activity and myeloperoxidase activity determined over 30 min after sacrifice. These findings indicate that the expression of iNOS accounts for most of the damage caused by TNBS and that the administration of 1400W after the onset of colitis has a beneficial action on the colonic injury. (C) 2001 Elsevier Science Inc. All rights reserved. [References: 37]
机译:胃肠道炎症与一氧化氮(NO)的产生增加和诱导型NO合酶(iNOS)的表达有关。使用由三硝基苯磺酸(TNBS)诱导的结肠炎的实验模型,我们试图确定iNOS的特异性抑制剂N-(3-(氨基甲基)苄基)乙am(1400W)的施用是否对INOS具有有益作用结肠损伤。直肠内滴注TNBS后第5天到第10天腹膜内给予1400W(0.4和2 mg / kg /天)。 TNBS导致结肠溃疡和炎症,结肠髓过氧化物酶活性增加以及从第1天到第15天的钙非依赖性NOS的表达。1400W减少了TNBS引起的肉眼可见的损害和组织学变化以及钙非依赖性NOS活性处死后30分钟内测定髓过氧化物酶活性。这些发现表明,iNOS的表达是由TNBS引起的大部分损伤的原因,并且结肠炎发作后给予1400W对结肠损伤具有有益作用。 (C)2001 Elsevier Science Inc.保留所有权利。 [参考:37]

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