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- W2017460019 abstract "Cadmium, a toxic environmental pollutant, affects the function of different organs such as lungs, liver and kidney. Less is known about its toxic effects on the gastric mucosa. The aim of this study was to investigate the mechanisms by which cadmium impacts on the physiology of gastric mucosa. To this end, intact amphibian mucosae were mounted in Ussing chambers and the rate of acid secretion, short circuit current ( I sc ), transepithelial potential ( V t ) and resistance ( R t ) were recorded in the continuous presence of cadmium. Addition of cadmium (20 µM to 1 mM) on the serosal but not luminal side of the mucosae resulted in inhibition of acid secretion and increase in NPPB-sensitive, chloride-dependent short circuit current. Remarkably, cadmium exerted its effects only on histamine-stimulated tissues. Experiments with TPEN, a cell-permeant chelator for heavy metals, showed that cadmium acts from the intracellular side of the acid secreting cells. Furthermore, cadmium-induced inhibition of acid secretion and increase in I sc cannot be explained by an action on: 1) H 2 histamine receptor, 2) Ca 2+ signalling 3) adenylyl cyclase or 4) carbonic anhydrase. Conversely, cadmium was ineffective in the presence of the H + /K + -ATPase blocker omeprazole suggesting that the two compounds likely act on the same target. Our findings suggest that cadmium affects the functionality of histamine-stimulated gastric mucosa by inhibiting the H + /K + -ATPase from the intracellular side. These data shed new light on the toxic effect of this dangerous environmental pollutant and may result in new avenues for therapeutic intervention in acute and chronic intoxication." @default.
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- W2017460019 date "2010-06-01" @default.
- W2017460019 modified "2023-09-23" @default.
- W2017460019 title "Cadmium inhibits acid secretion in stimulated frog gastric mucosa" @default.
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- W2017460019 doi "https://doi.org/10.1016/j.taap.2010.03.010" @default.
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