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. 1979 May;189(5):637–641. doi: 10.1097/00000658-197905000-00014

Influence of Hydrogen Ion Concentration on Bile Acid Induced Acute Gastric Mucosal Ulcerogenesis

Wallace P Ritchie Jr, Kenneth J Cherry Jr
PMCID: PMC1397202  PMID: 36049

Abstract

Aggressive treatment with H2 receptor blocking agents and/or antacids has been advocated as effective prophylaxis against and treatment for “stress ulcer,” based on the logical but infrequently tested assumption that the severity of the disease is critically determined by the concentration of intraluminal acid. The present study investigated this assumption in a model which employed topical acid, topical bile acid and mucosal ischemia to induce ulcerogenesis. With vascularized, chambered ex vivo wedges of canine proximal gastric wall, groups of animals were studied during three sequential periods using topical test solutions (TS) containing either 0 mM, 100 mM or 160 mM HCI. During period 1, mucosae were exposed to TS alone; during period 2, either to TS containing 1 mM sodium taurocholate (TC) or to TS and concomitant vasopressin infusion (VP); and during period 3, to TS + TC + VP. Parameters evaluated included net H+ flux (△H+), aminopyrine clearance (AC), a measure of mucosal blood flow, net TC flux (△TC) and the lesion index, graded 0-5. The data indicate that in nonischemic mucosa exposed to constant [TC], AC was significantly increased, △H+ (“back-diffusion”) increased as a linear function of [H+] and no lesions were observed. Under the same circumstances in ischemic mucosa, △H+ increased as linear function of [H+]. As a consequence, lesion severity was also a linear function of [H+]. △TC was enhanced at low pH but bore no relation to the degree of mucosal damage induced. Assuming applicability of the model, these studies provide support for the use of H2 receptor blocking agents and/or antacids to prevent or ameliorate “stress ulcer” disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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