Abstract
AIM: To determine whether Helicobacter pylori releases cysteamine into gastric juice as cysteamine is known to be ulcerogenic. METHODS: Samples of fasting gastric juice were collected from 22 individuals (four women); 10 subjects were H pylori negative. The presence of infection was confirmed by examination and culture of gastric biopsies. Cysteamine in gastric juice was measured by reversed phase gradient high performance liquid chromatography with a detection limit of 10 mumol/l. RESULTS: Cysteamine was not detected in any of the gastric juice samples or in extracts of cultured H pylori. CONCLUSIONS: If H pylori produces cysteamine then the amounts produced are insignificant and are unlikely to explain the association between H pylori infection and the development of duodenal ulcer disease.
Full text
PDF

Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Campylobacter-like organisms in the stomach of patients and healthy individuals. Lancet. 1984 Jun 16;1(8390):1348–1349. [PubMed] [Google Scholar]
- Kapuscinski M., Shulkes A., Green M., Read D., MacLellan D. G. Cysteamine can induce duodenal ulceration in rats without depletion of immunoreactive somatostatin. Regul Pept. 1991 Nov 26;36(3):391–406. doi: 10.1016/0167-0115(91)90072-o. [DOI] [PubMed] [Google Scholar]
- Konturek J. W., Konturek S. J., Domschke W. Cholecystokinin in the control of gastric acid secretion and gastrin release in response to a meal at low and high pH in healthy subjects and duodenal ulcer patients. Scand J Gastroenterol. 1995 Aug;30(8):738–744. doi: 10.3109/00365529509096321. [DOI] [PubMed] [Google Scholar]
- Levi S., Beardshall K., Haddad G., Playford R., Ghosh P., Calam J. Campylobacter pylori and duodenal ulcers: the gastrin link. Lancet. 1989 May 27;1(8648):1167–1168. doi: 10.1016/s0140-6736(89)92752-9. [DOI] [PubMed] [Google Scholar]
- Moss S. F., Legon S., Bishop A. E., Polak J. M., Calam J. Effect of Helicobacter pylori on gastric somatostatin in duodenal ulcer disease. Lancet. 1992 Oct 17;340(8825):930–932. doi: 10.1016/0140-6736(92)92816-x. [DOI] [PubMed] [Google Scholar]
- Mårtensson J., Svensson H., Tobiasson P. Influence of the bacterial flora of the gut on sulfur amino acid degradation. A study of patients with bacterial overgrowth before and during treatment with oxytetracycline or metronidazole. Scand J Gastroenterol. 1985 Oct;20(8):959–965. doi: 10.3109/00365528509088855. [DOI] [PubMed] [Google Scholar]
- Neithercut W. D., Williams C., Hossack M. S., McColl K. E. Ammonium metabolism and protection from urease mediated destruction in Helicobacter pylori infection. J Clin Pathol. 1993 Jan;46(1):75–78. doi: 10.1136/jcp.46.1.75. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ohe K., Miura Y., Taoka Y., Okada Y., Miyoshi A. Cysteamine-induced inhibition of mucosal and pancreatic alkaline secretion in rat duodenum. Dig Dis Sci. 1988 Mar;33(3):330–337. doi: 10.1007/BF01535759. [DOI] [PubMed] [Google Scholar]
- Smith D. A. S-amino acid metabolism and its regulation in Escherichia coli and Salmonella typhimurium. Adv Genet. 1971;16:141–165. doi: 10.1016/s0065-2660(08)60357-0. [DOI] [PubMed] [Google Scholar]
- Soda K. Microbial sulfur amino acids: an overview. Methods Enzymol. 1987;143:453–459. doi: 10.1016/0076-6879(87)43080-2. [DOI] [PubMed] [Google Scholar]
- Szabo S., Reichlin S. Somatostatin depletion by cysteamine: mechanism and implication for duodenal ulceration. Fed Proc. 1985 Jun;44(9):2540–2545. [PubMed] [Google Scholar]
- Tarnasky P. R., Kovacs T. O., Sytnik B., Walsh J. H. Asymptomatic H. pylori infection impairs pH inhibition of gastrin and acid secretion during second hour of peptone meal stimulation. Dig Dis Sci. 1993 Sep;38(9):1681–1687. doi: 10.1007/BF01303178. [DOI] [PubMed] [Google Scholar]
- Turnell D. C., Cooper J. D. Rapid assay for amino acids in serum or urine by pre-column derivatization and reversed-phase liquid chromatography. Clin Chem. 1982 Mar;28(3):527–531. [PubMed] [Google Scholar]
- el-Omar E. M., Penman I. D., Ardill J. E., Chittajallu R. S., Howie C., McColl K. E. Helicobacter pylori infection and abnormalities of acid secretion in patients with duodenal ulcer disease. Gastroenterology. 1995 Sep;109(3):681–691. doi: 10.1016/0016-5085(95)90374-7. [DOI] [PubMed] [Google Scholar]
