Abstract
The aim of this study was to investigate the effect of N-G-nitro-L-arginine-methyl ester (L-NAME), a nitric oxide synthase inhibitor, on the gastric mucosal barrier in rats. A group of Swiss albino rats received L-NAME (60 mg/kg/d) in their drinking water daily for 21 d. The mucin and prostaglandin E2 (PGE2) contents of the gastric mucosa were measured in gastric tissue samples. L-NAME intake did not affect gastric mucin, but it significantly reduced PGE2, a component of the gastric mucosal barrier. The results of this study imply that nitric oxide plays an important mediatory role in maintaining the gastric mucosal barrier. The inhibition of nitric oxide may be involved in the increased vulnerability of the gastric mucosa to injurious stimuli in rats.
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