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Carbenoxolone gastroprotective mechanism: Participation of nitric oxide/ GMP/K pathway in ethanol-induced gastric injury in the rat

Fundamental and Clinical Pharmacology, ISSN: 0767-3981, Vol: 25, Issue: 6, Page: 717-722
2011
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Article Description

Carbenoxolone, a semi-synthetic triterpenoid, exhibits gastroprotective activity related to the participation of nitric oxide (NO); however, the complete NO/ GMP/K channels pathway for carbenoxolone is unknown. Therefore the aim of this study was to examine the NO/ GMP/K channels pathway as the gastroprotective mechanism of carbenoxolone in the ethanol-induced gastric injury model in the rat. Oral administration of carbenoxolone (30mg/kg, p.o.) exhibited gastroprotective effect against ethanol-induced gastric injury in rats. Pretreatment with N -nitro-l-arginine methyl ester (L-NAME, 70mg/kg, i.p.); 1H-[1,2,4]oxadiazolo[4,3-a]quinoxaline-1-one (ODQ, guanylate cyclase inhibitor, 10mg/kg, i.p.); or glibenclamide (K channels inhibitor, 1mg/kg, i.p.) reversed the gastroprotective effect of carbenoxolone for ethanol-induced gastric injury. Furthermore, gastric prostaglandins and NO levels increased after carbenoxolone administration in ethanol-induced gastric injury in rats. In conclusion, our results suggest that the increase of NO levels in gastric tissue after pretreatment with carbenoxolone activates the NO/ GMP/K channels pathway, the principal gastroprotective mechanism of carbenoxolone. © 2010 The Authors Fundamental and Clinical Pharmacology © 2010 Société Française de Pharmacologie et de Thérapeutique.

Bibliographic Details

Chávez-Piña, Aracely Evangelina; Tapia-Álvarez, Gabriela Rubí; Reyes-Ramínrez, Adelfo; Navarrete, Andrés

Wiley

Pharmacology, Toxicology and Pharmaceutics; Medicine

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