Abstract
Application of mild irritants (1 M NaCl; pH 2.0) on the gastric mucosa potentiates the protective secretion of bicarbonates by epithelial cells. This response is mainly mediated by capsaicin-sensitive afferent nerve endings located in the submucosa. It was shown that activation of vanilloid type 1 receptors (TRPV1) induced by exogenous acidification of GM is not sufficient to potentiate the production of HCO3, including production depending on neuronal NO synthase. However, the effect of exogenous acid on TRPV1 leads to activation of endothelial NO synthase that restrict the gastric secretion of [Formula: see text].
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