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Effects of endogenous production and exogenous administration of H2S on gastric acid secretion in rats

Author(s): seyyed Ali Mard | Maryam Maleki | Mohammad Kazem Gharib Naseri | Alihosein Saberi

Journal: Physiology and Pharmacology
ISSN 1735-0581

Volume: 15;
Issue: 4;
Start page: 499;
Date: 2012;
Original page

Keywords: gastric acid output | NaHS | PAG | rat

Introduction: Recently, hydrogen sulfide has been introduced as the third gas that acts as a transmitter. It has many physiological and pharmacological roles in the human body. The aim of the present study was to investigate the effect of exogenously administered and endogenously produced H2S on the basal and distention-induced gastric acid secretion in rats. Methods: Forty-nine male Wistar rats (150-200 g) were randomly assigned into 7 groups (7 rats per group). To evaluate the effect of H2S on the basal acid secretion, three groups of animals received an IV bolus of NaHS, a H2S donor, at the doses of 20, 40 or 80 μg/Kg. The effects of IV NaHS 20, 40 or 80 μg/Kg were also investigated on distention-induced gastric acid secretion in other three groups. In order to evaluate the effect of endogenously produced H2S on distention-induced gastric acid secretion, one group of animals received IV propargylglycine (PAG), a cystathionine-γ-lyase inhibitor, 100 mg/kg. Results: NaHS decreased the basal and distention-induced gastric acid secretion in a dose-dependent manner (P
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