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Effect of Proton Pump Inhibitors on the Secretion of Bicarbonates and Pepsinogen Induced by Chemical Stimulation of the Gastric Mucosa

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Proton pump inhibitors were shown to affect the sensitivity of the gastric mucosa to chemical agents. This effect is associated with inhibition of proton back-diffusion and increase in the permeability of the gastric epithelium. We studied the effect of omeprazole on gastric secretion of bicarbonates and pepsinogen induced by irritation of the gastric mucosa in narcotized rats with a hypertonic solution of high acidity (500 mM NaCl, pH 2.0). Irritation of the gastric mucosa increased the basal secretion of bicarbonates and potentiated the secretion of \( \mathrm{HCO}_3^{-} \) and pepsinogen induced by electrostimulation of the vagus nerve. Omeprazole stimulated the prostaglandin-induced increase in the basal secretion of \( \mathrm{HCO}_3^{-} \) and pepsinogen. By contrast, bicarbonate production in response to vagal stimulation was suppressed in the presence of omeprazole. Our results indicate that proton pump blockade has a modulatory effect on gastric secretion of bicarbonates and pepsinogen induced by chemical stimulation of the gastric mucosa.

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Authors and Affiliations

  1. I. P. Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia

    V. A. Zolotarev & R. P. Khropycheva

Authors
  1. V. A. Zolotarev
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  2. R. P. Khropycheva
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Correspondence to V. A. Zolotarev.

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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 154, No. 10, pp. 406-409, October, 2012

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Zolotarev, V.A., Khropycheva, R.P. Effect of Proton Pump Inhibitors on the Secretion of Bicarbonates and Pepsinogen Induced by Chemical Stimulation of the Gastric Mucosa. Bull Exp Biol Med 154, 415–418 (2013). https://doi.org/10.1007/s10517-013-1964-0

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  • DOI: https://doi.org/10.1007/s10517-013-1964-0

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