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Helicobacter pylori and gastric histamine concentrations.
  1. D M Queiroz,
  2. E N Mendes,
  3. G A Rocha,
  4. J R Cunha-Melo,
  5. A J Barbosa,
  6. G F Lima, Jr,
  7. C A Oliveira
  1. Laboratory of Research in Bacteriology, Faculdade de Medicina, Universidade Federal de Minas Gerais, Brazil.

    Abstract

    An enzyme isotopic assay was used to determine the histamine concentration in the gastric mucosa of patients positive for Helicobacter pylori with (n = 11) and without duodenal ulceration (n = 9) and in negative controls (n = 7). A significant difference was observed when the histamine content of H pylori negative subjects was compared with that of positive patients. On the other hand, there was no significant difference in histamine concentration between H pylori positive patients with duodenal ulceration and those without duodenal ulceration. H pylori positive patients with and without duodenal ulceration had significantly lower gastric histamine concentrations than H pylori negative subjects. The lower gastric histamine concentration observed in H pylori positive patients might be due to increased histamine release which could in turn induce increased gastric acid secretion.

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